GEOLOGGEOLOGYY OOFF THTHEE NORTHERNORTHERNN STANSBURSTANSBURYY RANGERANGE,, TOOELTOOELEE COUNTYCOUIif.PY,, UTAUTAHH

bbyy

DwighDwightt EllswortEllsworthh ArnoldArnold

A, thesisthesis submittedsubmitted toto thethe facultyfaculty ooff thethe UniversityUniversity ofof UtahUtah inin partialpartial fulfillmentfulfillment ofof thethe requirementsrequirements forfor thethe degreedegree ofof

l-1asterMaster ofof ScienceScience

DepartmentDepartment ofof GeologyGeology

LIBRARLIBRARYY UNIVERSITYUNIVERSITY OFOF UTAHUTAH UniversityUniversity ofof UtahUtah

JJune, 1956 37%.ZiZ ^e5 1956 This Thes is for the E .. So d eg::cee

by

DHight Eo Arnold

has been approved by

� --dr�Chairman, SUP0 visor pommittee

upervisory Committee

, Supervisory Committee--- �� Head� Major Department

368566 TABLTABLEE OOFF CONTENTCON TENTSS Page

INTRODUCTIOINTRODUCTIONN •. o 0 0 • • 0 ~ • 0 • • 0 • G 0 o 0 () 0 soo 1

LocatioLocationn .• »0 .• .• • • 0 0 • c • • 1 G © e O * & • 0 PreviouPr eviouss WorWorkk anandd ExplorationExploration co•• o 0 • c • • 1 PurposPurposee o0 ©0 o0 o0 o•• o o• o0 •••• • * • • • 0 2

Field.d WorWorkk c0 »0 « 0 .9 •G •(J «0 .• . 0 " • " • G • 0 • 0 2

AcknowledgementAcknowledgementss • 0 0 • • o 0 o 0 O O

STRATIGRAPHSTRATIGRAPHYY ...... • OOOO . . O O U .o .0 •. o • • · . 5

CambriaCambriann SystemoSystem, 0 o 0 • 0 o • .. O O 0 O 0 • • • 5

Opex Formation 0 • 0 0 • 0 0 0 • 0 o .. 6 Opex Formation 0 o o o o • o UnnameUnnamedd CambriaCambriann (?(?)) FormationFormation .. .. 0 o 0 9

OrdoviciaOrdoviciann SystemoSystem 0 0 .00 11 " 0 • • • • 0 . "

Garden City Limestone 0 • 0 • • • • Garden City Limestone Oo O O o a « 12 SwanSwan PeaPeakk (?(?)) FormationoFormation o ...o o 0o o0 6 " 15 FisFishh HaveHavenn DolomiteDolomite O0 •O 0O o 0 0o •o e• 0 • o. 18

DevoniaDevoniann System.System, " • . • . • 0 o 0 • • ~ e 20

0 0 • ~ 0 0 0. • 22 StansburyStansbury FormationFormation ••o o o o Dolomite Conglomerate 0 • 0 • Dolomite Conglomerate ••o o o • 0 • 0 23

MississippianMississippian SystemSystem • • • 0 o 0 0 0 o • • oooooooo · .. 31

UnnamedUnnamed MississippianMississippian Formation.Formationo 0 0 0 0 32

0 0 • • 0 Madison-DeseretMadison-Deseret LimestoneLimestone. ,••• 0 « . HumbugHumbug FormationFormation 0« 0• •o 0• 0• 0. 0* •. 0 • • • ~f

GreatGreat BlueBlue LimestoneLimestone •« 0• .0 „• • • .• • • • 0 44

MississippianMississippian (?)(?) ~- PennsylvanianPennsylvanian BedsBeds ... 47 • 0

ManningManning CanyonCanyon FormationFormation o 0 0 0 47 •o C>o •o o•

STRUCTURE 0 o • o 0 0 o 0 0 e 0 000 o 0 STRUCTURE.o o .9 .o .• oocooo.e . o o o © © o 49

Folds.Fold Soeooooocouoeoooo 0 0 •• 0 0 • " 0 • • 0 • o•• 0 o .. 49 FaFaul ul.t S 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .. 0 49 DevonianDevonian (?)(?) Uplift.Uplift 0 •• 0 ••• 0 0 •• 50 oooooooooo · "

LAKELAKE BONNEVILLEBONNEVILLE SHORELINESSHORELINES • o 0 0 Q o 0 o c o o • 0 51

iii111 .fage

EECONOMICONOMI C GEOLOGYGEOLOGY 0. 0. 0. 0• " . o 0 o 0 0 • . 00 0 " • 0

Qu.aI'ryiQuarryinngg OpeOperationrationss 0 0 0 0 " U 0 " " 0 0 0 0 53

BIBBIBLIOGRAPHLIOGRAPHYY e0 . 0 « 0 • 0 « " „0 .0 " o 0 9 000 00 0" 0 0 56

1v ILLUSTRATIONILLUSTRATIONSS

FigureFigur ess

FollowinFollowingg PagPagee

FiFig.g . 1 IndeIndexx MaMapp .• ... .0 ••• #..~ .»'#».••#•-.0 • • • • • • 0 • • . • .• 11

FigFig.. 2 GeneralizeGeneralizedd StratigraphiStrat igraphicc ColumnColumn*. .e ... •.. . 55 FigFig.. 3 CumulativCumulativee SizSizee FrequencFrequencyy CurvCurvee ofof ConglomeratConglomeratee iinn ththee StansburStansburyy FormatioFormationn .• 242k

FigFig.. k4 SizSizee FrequencFrequencyy HistograHistogramm ofof ConglomeratConglomeratee iinn ththee StansburyStansbury FormatioFormationn .. • • • • • • • • • • • • • .. . 2525 FigFig., 55aa AngulaAngularr UnconformitUnconformityy BetweeBetweenn thethe ConglomeratConglomeratee MembeMemberr ooff ththee StansburyStansbury FormatioFormationn anandd ththee RepeateRepeatedd FishFish Haven Dolomite at Dolomite, Utah. . . . 26 Haven Dolomite at Dolomite, Utah .... e • • 26 FigFig.. 5b5b AngulaAngularr UnconformitUnconformityy BetweeBet\o1eenn thethe BasaBasall MississippianMississippian DolomitDolomitee andand GardenGarden CityCity StrataStrata iinn ththee TimpieTimpie

AreAreaa • • • • . e e • • • • • • 0 • • 0 » • 2626

Fig.Fig. 6 PossiblePossible ExplanationExplanation forfor ththee RepeatedRepeated FishFish HavenHaven DolomitDolomitee inin ththee NorthernNorthern StansburyStansbury RangRangee •...... • • .. • • e • .. • ••. 2727

Fig.Fig. 7 ConglomerateConglomerate inin StansburyStansbury FormatioFormationn • •. •. 2828 Fig.Fig. 8 ConglomerateConglomerate inin StansburyStansbury FormatioFormationn • •. .• 2929

Fig.Fig. 9.9 ProvoProvo ShorelineShoreline DepositsoDeposits . •. •„ eo.« , * 0, ..• .• 3300 Fig.Fig. 1010 ContactContact BetweenBetween Madison-DeseretMadison-Deseret LimestoneLimestone andand UnnamedUnnamed MississippianMississippian FormationFormation • • • •. .. • • • • • • ..« ..» 0. ...• . 3636

Fig.Fig. 1111 CorrelationCorrelation DiagramDiagram ofof PaleozoicPaleozoic RocksRocks inin NorthcentralNorthcentral Utah.Utah...... • e. o.. . •. 46*+6

Fig.Fig. 1212 CorrelationCorrelation DiagramDiagram ofof PaleozoicPaleozoic RocksRocks inin NorthcentralNorthcentral Utah.Utah...... • • • • ^7

v Fol ..;. )vJl.ng Pag>3

FigoFigo 1313 GeologicGeologic SectionSection ofof northernnorthern

Stansbury Range «) 0 0 0 0 0 0 u " I.t 0 0 0 Ir8 Stansbury Range O O O O Q O O FigoFigo 14ih GeologicGeologic SectionSection ofof NortheraNorthern

Stansbury Range «) 0 0 • • 0 0 \J 0 C ... GI 0 Stansbury Range c o o o u o a Figo 15 GeologicGeologic MapMap ofof NorthernNorthern StansburyStansbury RangeRang*. o ..o «)o 0o • e "e

FigoFigo 1616 Bonneville,Bonneville^ Provo?Prove? Andand StansburyStansbury Shol'elineShoreline FE~atUI'esFeatures nean3arr J.i'lllX:~Flux, Ut[-l.hUtai 0 " 0 ..

FigoFigo 1717 BonnevillBonneVillee andand ProvoProve ShorelineShoreline FeatureFeaturess neanearr Grantsville(}I'antsville~. UtahUtah "• 0 " 0 "

FigoFig0 1818 LimestoneLimestone QuarryQuarry anan~d MillMill atat

Fluxj Utah, Q • " • • 0 Flux, Utah..il l • t * t f * : I • 'lIableTable

TableTable 1 AnalYSisAnalysis ofof RockRock andand HockRock Products,)Products

Flux and Dolomite., Utah 0 " " " Flux and Dolomite, Utah .....O O O O 6 " 0 0 53

vivi ININTRODUCTIOTRODUCTIONN

LoLocatiocationn

TheThe StansburyStansbury RangeRange isis lolocatecatedd inin thethe easterneastern partpart ofof

TooeleTooele CountY9County9 Utah99 inin thethe nnortheasterortheasternn parpartt ofof thethe BasinBasin

andand RangRangee ProvinceoProvince« TheThe rangrangee isis 2525 milemiless longlong andand 2 toto 1010

milesmiles wide.wide. TheThe crestlinecrestline passepassess aboutabout 5 milemiless westwest ofof

Grantsville,Grantsville, UtahoUtaho TheThe rangrangee isis coconsiderensideredd toto bebe a north=north­

wardward extensionextension ofof thethe Onaqu i MountainsMountains andand isis separatedseparated fromfrom

thesthesee mountainsmountains toto thethe southsouth byby a lowlow dividedivide knowknownn asas JohnsonJohnson Pass.Pass.

TheThe areaarea coveredcovered byby thisthis reporr eportt (see(see indexindex map)map) isis aa

relativelyrelatively smallsmall sectionsection ofof thethe northernnorthern partpart ofof thethe Stans=Stans­

burybury Range.Range. ItIt isis readilyreadily accessibleaccessible fromfrom U,o SoS. HighwayHighway

40-50*f0-50 whichwhich skirtsskirts thethe easterneastern sideside ofof thethe rangrangee northwestnorthwest

ofof Grantsville,Grantsville, Utah9~ andand thethe northernorthernn titipp ofof thethe rangerange atat

Timpie,Timpie, Utah.Utah.

PreviouPreviouss WorkWork andand ExplorationExploration

TheThe geologygeology ofof thethe StansburyStansbury RangeRange was·was investigateinvestigated

brieflybriefly bbyy thethe pioneeplo~eerr geologistsgeologists ofof Wheeler1u's$ famedfamed surveyssurveys

weswestt ofof thethe 100th100th meridiameridiann (1875)(1875) . aan,ndd King 80 s surveysurvey alongalong

thethe 40th*fOth parallelparallel (1878)0(I878). InIn l890~I89O9 GoG0 KoK„ Gilbert iss classicalclassical monographmonograph onon LakeLake BonnevilleBonneville waswas publishepublishedd inin whicwhichh hehe in~in­

eludedcluded datadata onon thethe shorelineshoreline featuresfeatures foundfound inin thethe StanStansbursburyy

1 112°

- -

./ , , ... \ =:. :. BOX ELDER CO . .••:- ...... ' ~,,- -- ~ ... - , TOOELE CO. ,:-'" : \ \ \

UOS. S.. HWYHWY. . 40 —_ 50 8 0

:::- \

: "\1,, \, ~lIf',II' ::

~~ -:. ";I." \1,, , " , " /111"1 'I I, , II1I :. I, I" "'~~ " SCALESCALE ININ MILESMILES ... , .." ' ... : .. - : ": o 10 20 --,, y u\% r ...," " '! II" .*- /AX ~." I, '" Z V TINT1C « TOOELE CO . "', ',' -: TOOELE- CO--- ~.---- r )- MTNS. \ N JUAJUABB COCO . , ... .0 - ;-~"" '",,\~ '11 t!r~H~CO. I,.. .JUABOUAB COCO. . , , = .:-"",\ " .11 : : '1/11"" ',~

INDEXINDEX MAPMAP OFOF NORTHCENTRALNORTHCENTRAL UTAHUTAH SHOWINGSHOWING LOCATIONLOCATION OFOF NORTHERNNORTHERN STANSBURYSTANSBURY AREAREAA ANDAND

OTHEROTHER LOCALITIESLOCALITIES REfERREDREFERRED TTOO ININ TEXTTEXT

C'''' 1 I:

2

MountainsMountains andand brieflybriefly commentedcommented onon hihiss observationsobservations ofof thethe

faultfault structurestructure ofof thethe rangerange.o,

R.R. E.E. MarselMarselll madmadee a geologicalgeological reconnaissancreconnaissancee ofof thethe

SouthSouth WillowWillow - Mt.Mt. DesertDesert sectionsection ofof ththee southernsouthern parpartt ofof thethe

rangerange whicwhichh resultedresulted inin anan unpublishedunpublished reportreport inin 192501925*

MoreMore recentlyrecently,, HubertHubert CoCo LambertLambert studiedstudied thethe structurestructure

andand ththee stratigraphystratigraphy ofof ththee southernsouthern StansburyStansbury Range .o ThisThis

studystudy formedformed ththee basibasiss forfor a MasterisMaster8s ThesisThesis atat ththee UniversityUniversity

ofof Utah.Utah.

TheThe writewriterr beganbegan a studystudy ofof thethe northernnorthern partpart ofof thethe

rangerange inin ththee SpringSpring ofof 1953,1953? atat thethe suggestionsuggestion ofof DroDr. WilliamWilliam

LeeLee Stokes,Stokes, ProfessoProfessorr ofof Geology,Geology, UniversitUniversityy ofof UtahoUtah.

PurposePurpose

TheThe purposespurposes ofof thithiss investigationinvestigation werewere:: (1)(1) toto obtainobtain

a detaileddetailed stratigraphicstratigraphic sectionsection ofof thethe PaleozoicPaleozoic rocksrocks inin

thisthis areaarea withwith associatedassociated paleontologipaleontologicc data;data; (2)(2) ttoo explainexplain

thethe unusuaunusuall conglomerateconglomerate sectionsection inin thethe PaleozoiPaleozoicc rocks:rocks; (3)(3)

toto determinedetermine thethe geologygeology ofof thethe economiceconomic productsproducts derivedderived

fromfrom thethe area.area.

FieldField WorkWork

FieldField workwork wawass carriedcarried onon intermittentlyintermittently fromfrom April,April, 19531953

throughthrough NovemberNovember,, 19540195^. TheThe stratigraphicstratigraphic sectionssections werewere mea­mea­

suredsured byby Brunton-tapeBrunton-tape traverse.o ProfilesProfiles werweree runrun acrossacross

thesthesee sectionssections witwithh a PaulinPaulin Micro-altimeteMicro-altimeterr andand geologicgeologic 3 crosscross sectionssections werewere constructedconstructed fromfrom thesethese data.data. PertinentPertinent geologicgeologic datadata andand availableavailable sectionsection cornerscorners werweree plotteplottedd onon aerialaerial photographsphotographs withwith a 1:20,0001:20,000 scale.scale. ThisThis informationinformation waswas transferredtransferred toto a mapmap basebase byby radial-lineradial-line assemblyassembly fromfrom whichwhich a geologicgeologic mapmap waswas mademadeo.

AcknowledgementsAcknowledgements

TheThe writerwriter isis particularlyparticularly gratefulgrateful toto DrDr.. WilliaWilliamm LeeLee

Stokes,Stokes, HeadHead ofof thethe DepartmentDepartment ofof GeologyGeology atat thethe UniversityUniversity ofof Utah,Utah, forfor hishis helpfulhelpful guidanceguidance inin thethe preparationpreparation ofof thisthis report.report.

AnAn expressionexpression ofof gratitudegratitude isis alsoalso duedue DrDr.. ArmandArmand J.J.

EardleyEardley andand Dr.Dr. F.F. W.W. ChristiansenChristiansen forfor theitheirr helpfulhelpful sugges­sugges­ tion~tions andand constructiveconstructive criticismscriticisms bothboth inin thethe fieldfield worworkk andand inin thethe preparatiopreparationn ofof thethe manuscriptmanuscripto.

SpecialSpecial thanksthanks areare duedue WalterWalter Sadlick~Sadlick, UniversitUniversityy ofof Ne­Ne­ braska,braska, HelenHelen Duncan,Duncan, AllisonAllison R.R. PalmerPalmer andand EllisEllis LL.. Yochelson,Yochelson

U.S.G.S.,U.S.G.S., ChristinaChristina LochmanLochman Balk,Balk, UniversityUniversity ofof NeNeww Mexico,Mexico,

MerrillMerrill Stainbrook,Stainbrook, Brandon,Brandon, Iowa,Iowa, L.L. L.L. Sloss,Sloss, NorthwesternNorthwestern

University,University, andand HowardHoward R.R. Cramer,Cramer, FranklinFranklin andand MarshalMarshalll Col­Col­ legelege forfor fossilfossil identifications.identifications.

TheThe authorauthor isis indebtedindebted toto MaximMaxim K.K. Elias,Elias, UniversitUniversityy ofof

Nebraska,Nebraska, forfor graciouslygraciously allowingallowing hishis paleontologicpaleontologic -findingsfindings inin thethe GreatGreat BlueBlue formationformation ofof thisthis areaarea toto bbee includedincluded inin thisthis report.report.

ManyMany thanksthanks gogo toto membermemberss ofof thethe SaltSalt LakLakee CityCity officeoffice ofof thethe GulfGulf OilOil CorporationCorporation withwith whomwhom thethe authorauthor workeworkedd whilewhile 4k preparinpreparingg thisthis reportreport forfor thethe useuse ofof fieldfield andand draftingdrafting equip­equip­ menmentt whicwhichh greatlygreatly aidedaided thethe completioncompletion ofof thisthis work.work*

FelloFelloww studentsstudents andand friends,friends, FrankFrank FrischknechFrischknechtt andand

ErnieErnie MuranyMurany helpfullyhelpfully assistedassisted inin thethe measuringmeasuring ofof ·thethe strat­strat­ igraphicigraphic sections.sections.

JohJohnn GardnerGardner andand ·W.W. FoF. (Bill)(Bill) Miller,Miller, UtahUtah LimLimee andand StoneStone

CompanyCompany,, SaltSalt LakeLake City,City, werewere mostmost cooperativecooperative iinn theirtheir expla­expla­ nationnation ofof thethe miningmining,, treatmentreatmentt andand useusess ofof thethe limestonelimestone productsproducts involvedinvolved inin thatthat firm'sfirm's operationsoperations atat FluxFlux andand Dolo­Dolo­ mite,mite, UtahUtah,, andand FarrellFarrell VV.. Howe,Howe, IllinoisIllinois PowderPowder ManufacturingManufacturing

CompanyCompany representative,representative, discusseddiscussed thethe blastingblasting proceduresprocedures usedused inin thesethese operations.operations.

HaroldHarold EE.. Thomas,Thomas, U.S.G.SU.S.G.S.. WaterWater SupplySupply Branch,Branch, SaltSalt LakeLake

City,City, Utah,Utah, generouslygenerously madmadee aerialaerial photographphotographss ofof thethe areaarea availableavailable forfor ththee author'authorVss use.use.

ManyMany thanksthanks areare duedue ProfessoProfessorr RaRayy MarsellMarsell forfor thethe counselcounsel andand guidanceguidance graciouslygraciously offeredoffered toto ththee writerwriter inin thethe prepara­prepara­ tiontion ofof thisthis report.report.

TheThe writerwriter isis indebtedindebted toto hihiss wife,wife, Alida,Alida, whowho assistedassisted immeasurablyimmeasurably inin thethe preparatiopreparationn ofof th~the illustrations.illustrations. STRATIGRAPHSTRAT IGRAPHYY

ThThee PaleozoiPaleozoicc stratstrataa outcroppinoutcroppingg iinn ththee northernorthernn Stans~Stans­ burburyy MountainMountainss rangrangee iinn agagee frofromm UppeUpperr CambriaCambriann toto

PennsylvanianPennsylvanian.. ThThee basbasee ooff ththee CambriaCambriann anandd totopp ooff thethe

PennsylvaniaPennsylvaniann araree nonott exposeexposedd iinn ththee areareaa studiestudiedod <>

ThThee sectiosectionn herheree iiss a thicthickk sequencsequencee comprisecomprisedd mainlmainlyy ofof marin~arinee carbonatcarbonatee rocksrocks.. ThThee clastic/carbonatclastic/carbonatee ratiratioo iiss veryvery loloww althougalthoughh interbeddeinterbeddedd sandsandss araree prominenprominentt iinn ththee UpperUpper

MississippiaMississippiann stratastrata.. Two-thirdTwo-thirdss ooff ththee DevoniaDevoniann sectiosectionn inin ththee eastereasternn parpartt ooff ththee areareaa undeunderr consideratioconsiderationn iiss repre­repre­ sentedsented bbyy a thicthickk dolomitdolomitee conglomeratconglomeratee witwithh associatedassociated interbeddeinterbeddedd quartzites.quartzites.

FoForr purposepurposess ooff thithiss reportreport,, twtwoo areaareass withinwithin ththee north­north­ ernern StansburyStansbury MountainMountainss araree discussed.discussed. OnOnee ooff thesthesee isis referrereferredd ttoo iinn ththee textextt aass thethe FluxFlux area,area, andand thethe strati­strati­ graphicgraphic sectionsection measuremeasuredd herehere~, asas thethe FluxFlux sectionsection afterafter FluxFlux9, Utah,Utah, whicwhichh isis nearby.nearby. ThThee otherother areaarea lieslies toto thethe weswestt inin sectionssections 15,1?, 2222,, 2727 andand 34,3fc, ToT. IS.,IS., RRo. 7Wo7W. ThisThis areaarea isis referredreferred toto inin thethe texttext asas ththee TimpieTimpie areaarea afterafter Timpie,Timpie, Utah,Utah, a nearbynearby stationstation onon thethe WesternWestern PacificPacific RailroadoRailroad. TheThe easterneastern oror FluxFlux areaarea waswas mappedmapped inin detail,detail, thethe TimpieTimpie areaarea waswas notnot mappedmapped butbut a stratigraphicstratigraphic sectionsection waswas measuredmeasured thereothere.

TheThe CambrianCambrian SystemSystem

TheThe CambrianCambrian sectionsection ofof thethe northernnorthern StansburyStansbury MountainsMountains isis relativelyrelatively incompleteincomplete asas onlyonly thethe UpperUpper CambrianCambrian waswas foundfound

5 , --- PENN.PENN. ~- --- Block,Black, fissile shale with thin, fine crystallinecrystalline --?-- ManningManning CanyonCanyon ------limestoneslimestones. . shaleshale ------

GreatGreat BlueBlue limestonelimestone r~~T Medium to dark gray, thin bedded, fossiliferousfossiliferous limestone;limest.()fle; upper half cherty.cherty. r~rr

Z

TTT Zto/jfDarkr praygray,, fine crystalline, fossiliferous, mediummedium MadMadison-Desere ison- Deserett . to thin bedded limestonejlimestone; cherty near the top.top. limestonelimestone . FTT

Z-ZZ Gray, fine crystalline, fosSIliferousfossiliferous ddomitedolomite wdhwith UnnamedUnnamed formationformation I interbedded chert near the bosebase..

o 0 Z ·0· 8 o Q Light gray, fine crystalline, thin bedded limestonelimestone a::or o GardenGarden CityCity limestonelimestone withwith interbedded siltstone; intraformationalintrafbrmational pe/iJlepebble conglomerates in the upper port.part.

. T. I 7TT7. dSdco" 0 aaij a:or UnnamedUnnamed ''"oormationr mat ion Fine crystalline, cherty, mottled dolomitejdolomite; :E 0 .. T~L/ /" medium to thin bedded.bedded. -* Qa... Opex forma1tion TTT/ / thin bedded; contains fossiliferous, olive-greenolive-green o L-__-L ______~~~?-:,~ shalesham un~unit, ~------~ GENERALIZEDGENERALIZED STRATIGRAPHICSTRATIGRAPHIC COLUMNCOLUMN " NORTHERNORTHERNN STANSBURYSTANSBURY RANGERANGE 6 ttoo bbee representedrepresented.. ThThee CambriaCambriann rockrockss araree besbestt exposeexposedd andand werweree measuremeasuredd iinn ththee TimpiTimpiee areareaa iinn sectionsectionss 2222 anandd 2727,, T.T.

IS.IS.,, RR.. 7W.7W.

TwTwoo distinctivdistinctivee lithologielithologiess araree presentpresent;; ththee uppeupperr iiss a thicthickk sequencsequencee ooff finfinee ttoo mediumediumm crystallincrystallinee dolomitedolomite,, andand ththee lowelowerr iiss siltsiltyy dolomitdolomitee anandd shale.o ThThee uppeupperr uniunitt iiss re~re­ ferreferredd ttoo aass ththee UnnameUnnamedd CambriaCambriann (?(?)) formatioformationn iinn thisthis reportreport;; ththee lowelowerr uniunitt iiss tentativeltentativelyy correlatecorrelatedd witwithh tthhee

OpeOpexx formatioformationn ooff ththee TintiTinticc mininminingg districtdistrict,, UtaUtahh (Loughlin,(Loughlin,

1919),1919), anandd iiss ssoo designateddesignatedo.

ThThee Cambrian-OrdoviciaCambrian-Ordoviciann contaccontactt aass determinedeterminedd iinn thisthis areaarea coincidecoincidess witwithh ththee lithologilithologicc breabreakk betweebetweenn ththee uniunitt rere­­ ferredferred ttoo aass ththee Gardenn Cityy limestonlimestonee anandd ththee underlyingunderlying . thicthickk beddebeddedd dolomitedolomite sequencesequence.. ThiThiss contaccontactt isis recognizedrecognized iinn ththee FluFluxx areaarea weswestt ofof tht hee quarrquarryy aatt DolomiteDolomite,, UtahUtah,, inin sectionsection 2525,, T.T. IS.IS.,, RR.. 7W.7W. TheThe samesame contactcontact mamayy bbee obserobservevedd inin thethe TimpieTimpie areaarea inin ththee eastward-dippingeastward-dipping stratastrata inin sectionsection

27,27, TT.. IS.,IS., R.R. 7W.,7W., andand thethe extremeextreme nortnorthh enendd ofof thethe rangerange inin ththee westward-dippinwestward-dippingg stratastrata immediatelyimmediately southsouth ofof U.o SoS. High­High­ wayway 40^+0 inin sectionsection 16,16, T.T. IS.~IS., R.R. 7W.7W.

FossilsFossils maymay eventuallyeventually proveprove thatthat thethe upperupper partpart ofof thethe thickthick beddedbedded dolomitedolomite sequencesequence isis OrdovicianOrdovician inin ageage andand thusthus reviserevise thethe tentativetentative positionposition ofof thethe Cambrian-OrdovicianCambrian-Ordovician boundaryboundary here.here.

OpexOpex FormationFormation

ThreeThree hundredhundred andand fortyforty feetfeet ofof thethe OpexOpex formationformation 'i.verweree 7 measuredmeasured inin thethe areaarea studiedostudiedc TheThe formationformation isis representedrepresented

bbyy a sequencesequence ofof siltysilty dolomitesdolomites withwith a 20-foot20-foot shaleshale unitunit aboutabout 1431^3 feetfeet belobeloww thethe contactcontact withwith thethe UnnamedUnnamed CambrianCambrian

(1)(?) formation.formation. A fossilfossil collectioncollection fromfrom thethe shaleshale wawass sentsent toto AllisoAllisonn RR.. Palmer,Palmer, U.S.G.S.U.S.G.S.,, whowho furnishedfurnished thethe followingfollowing report:report:

I1 linguloidlinguloid brachiopodbrachiopod (unidentifiable)(unidentifiable)

HousiHousiaa sp.sp. cranidiumcranidium andand pydgidiapydgidia

~This"This isis a veryvery characteristiccharacteristic UppeUpperr CambrianCambrian tri­tri- lobitelobite thathatt hahass a veryvery narrownarrow stratigraphicstratigraphic rangerange inin andand jusjustt belobeloww thethe ElviniaElvinia zonezone.. TheThe horizonhorizon fromfrom whichwhich youyou collectedcollected thethe trilobitestrilobites correlatescorrelates withwith thethe upperupper parpartt ofof ththee DunderbergDunderberg shaleshale inin thethe EurekaEureka district,district, NevadaNevada,, andand manymany otherother NevadNevadaa lo­lo­ calities;calities; witwithh ththee OrrOrr inin ththee HouseHouse RangeRange,, andand withwith thethe WormWorm CreekCreek quartzitequartzite oror immediatelyimmediately overlyingoverlying bedbedss inin ththee WasatchWasatch Range.Range. ItIt alsoalso correlatescorrelates withwith thethe uppeupperr 3030 feetfeet ofof thethe OpexOpex inin thethe TinticTintic d:Lstrict.district,"tI

TheThe shaleshale waswas 2020 feetfeet thickthick wherewhere measured,measured, butbut itit pinch­pinch' eses outout entirelyentirely awayaway fromfrom thethe axisaxis ofof thethe anticlineanticline andand thickensthickens towardtoward thethe centercenter ofof thethe foldofold.

IItt shouldshould bbee emphasizedemphasized thatthat thethe bottombottom ofof thethe measuredmeasured sectionsection representsrepresents thethe lowestlowest stratigraphicstratigraphic levellevel thatthat couldcould bbee foundfound inin thethe areaarea andand doesdoes notnot representrepresent thethe truetrue strati­strati­ graphicgraphic basbasee ofof thethe OpexOpex formationoformation. ThereThere werewere nnoo lithologiclithologic breaksbreaks oror diagnosticdiagnostic fossilsfossils encounteredencountered inin thethe uniunitt underly­underly­ inging t~ethe shaleshale whicwhichh woulwouldd aidaid inin determiningdetermining thethe truetrue basebase ofof thethe UpperUpper Cambrian.Cambrian. TheThe writer,writer, thereforetherefore,, assumesassumes thatthat thethe basbasee ofof thethe OpexOpex formationformation lieslies somesome distancedistance beneathbeneath thethe lowermostlowermost measuredmeasured strataostrata*

.. 8

OpeOpexx FormatioFormationn ThicknessThickness iinn feetfeet

!1.• DolomiteDolomite:: graygray,, finelfinelyy crystallinecrystalline;; hashas mucmuchh silsiltt intersperseinterspersedd througthroughh ththee dolomitedolomite anandd presenpresentt aass interbeddeinterbeddedd siltsiltyy partings;partings; tatann ttoo rustrustyy weathereweatheredd surfacesurface;; ththee siltsilt contencontentt increaseincreasess downwardownwardd anandd ththee lowelowerr 8787 feefeett ooff thithiss uniunitt weatherweatherss ttoo a nearlynearly solisolidd orange-buforange-bufff color. o ••••••• 0 0 •• 1431^3

22.# ShalShalee anandd siltstonesiltstone:: olive-greeolive-greenn witwithh somesome mauvmauvee coloringcoloring;; hardhard,, compactcompact,, ververyy brittle;brittle; dendritidendriticc manganesmanganesee staistainn ververyy commocommonn alongalong ththee beddinbeddingg planesplanes;; acrosacrosss ththee canyocanyonn fromfrom wherwheree thithiss uniunitt wawass measuremeasuredd thithiss samsamee inter~inter­ vavall containcontainss intercalateintercalatedd finelfinelyy crystallinecrystalline limestonlimestonee bedbedss abouaboutt 3 ttoo 6 incheinchess thicthickk andand abouaboutt 1122 ttoo 1818 incheinchess apartapart;; somsomee limestonelimestone pebblepebbless araree presenpresentt alsoalso;; HousiHousiaa spspo« o0 „ 0 . • „o. « 0-200-20 33.. DolomiteDolomite:: densedense,, finelfinelyy crystallinecrystalline;; blackblack oonn fresfreshh surface,surface, weatherinweatheringg lighlightt gragrayy toto rustrustyy witwithh ththee lattelatterr coloringcoloring apparentlyapparently causecausedd bbyy ththee siltsilt content;content; somsomee thithinn limylimy silsiltt partingpartingss araree presenpresentt alsoalso,, weatherweatherss outout liklikee a boxworboxwork.k • • • • • • • . • •. . <0> * 0 . 0 • 2121

4. DolomiteDolomite:: gray-black,gray-black, weatherweatherss lighlightt graygray ttoo rustyrusty;; thinthin,, rustrustyy partingpartingss ofof limlimyy siltsilt throughoutthroughout;; thithiss uniunitt exhibitsexhibits highlhighlyy ir­ir­ regularegularr beddinbeddingg anandd isis thinthin beddedbedded toto flaggyflaggy throughoutthroughout (l-*(l-~f inchinch beds);beds); a slope-formerslope-former andand noticeablynoticeably leslesss resistantresistant thanthan thethe restrest

0 • • • • ofof ththee formation.formation* •« • • • • • • • e• * . . • • ~l51

5~.. Dolomite:Dolomite: lightlight gray,gray, finelyfinely crystalline;crystalline; weathersweathers tantan andand lightlight gray;gray; mediumediumm ttoo thin­thin- beddedbedded;; thinthin siltsilt partingspartings presenpresentt whichwhich weather rusty ••••• 0 • 0 •••••• 0 O. 10 weather rusty » . 0 o • • 10

6.6. Dolomite:Dolomite: likelike NooNoe ~5 butbut thick-beddedthick-bedded andand moremore resistantresistant ••••e«ooooo««*oee 0 • 0 0 0 0 0 ••• 0 ••o 0 63^3

7» Dolomite:Dolomite: likelike No.No. ~o5» 00.00« * «. » <> G« •. •* 0« c« • 0• 3232

MeasuredMeasured OpexOpex formationformation 3403*+0 (incomplete)(incomplete) 9

UnnamedUnnamed CambrianCambrian (?)(?) FormationFormation

TheThe UnnamedUnnamed CambrianCambrian (?)(?) formationformation consistsconsists ofof finfinee toto mediumediumm crystalline,crystalline, cherty,cherty, mottledmottled dolomitesdolomites whicwhichh areare generallygenerally mediumediumm toto thick-beddedthick-bedded throughoutothroughout. ThinThin dolomite­dolomite- pebble-conglomeratepebble-conglomeratess areare presentpresent inin thethe uppeupperr thirdthird ofof thisthis unitunit;; 688688 feetfeet ofof thisthis formationformation werewere measuredmeasured inin thethe areaarea studied.studied. A faultfault withwith anan estimatedestimated 50-?0- ttoo 100-foot100-foot displadisplacece=­ mentment isis presentpresent wherewhere thisthis uniunitt waswas measuredmeasured requirinrequiringg anan offsetoffset inin ththee measuredmeasured section.section.

TrilobitesTrilobites werewere collectedcollected fromfrom a beddinbeddingg planeplane somesome 450k-JO feetfeet aboveabove thethe basbasee ofof thithiss unitounit. ThereThere areare aboutabout 6060 feetfeet ofof stratastrata presentpresent betweenbetween thethe faultfault andand ththee bebedd inin whichwhich thesethese fossilsfossils werewere found.found. ThisThis collectioncollection waswas sentsent ttoo ChristinaChristina

LochmanLochman Balk,Balk, whwhoo furnishedfurnished thethe followingfollowing information;informations

ProsaukiaProsaukia misamisa (Hall)(Hall) IdahoiaIdahoia sp:--sp.

"Your"Your collectioncollection representsrepresents ththee ProsaukiaProsaukia subzonesubzone ofof ththee FranconianFranconian stagestage ofof thethe UpperUpper Cambrian;Cambrian; toto bbee correlatedcorrelated witwithh ththee uppeupperr halhalff ooff thethe Francon­Francon­ ianian formationformation andand equivalentequivalent formationso"formations."

TheThe followingfollowing sectionsection waswas measuredmeasured inin thethe TimpieTimpie areaarea inin sectionssections 2222 andand 27,27, T.T. lSD,IS., RoR. 7Wo:7W.s

UmamedUtnamed CambrianCambrian (?)(?) FormationFormation ThicknessThickness inin feetfeet

1, Dolomite:Dolomite: black,black, weatherweatherss mottledmottled graygray andand lightlight gray;gray; veryvery finelyfinely crystallinecrystalline andand somewhatsomewhat limy;limy; ptttedpitted weatheringweathering surface;surface; chertchert nodulenoduless areare scatteredscattered throughoutthroughout andand

0 weatheweatherr rusty.rusty. •. •. . •. . • ••••••• 0 .o .0 1010

2,, DolomiteDolom~te:: lightlight graygray toto gray,gray, weatheringweathering 1100

UnnameUnnamedd . CaflbriaCambriann (?(1)) FormatioFormationn (Cont.(Cont o)) ThicknessThickness iinn feetfeet

darkerdarker;; slightlslightlyy limylimy;; thithiss uniunitt occuroccurss inin leslesss resistantresistant,, scatterescatteredd outcrop,outcrop., .0 . 0 .•• . o0 6060

33.. DolomiteDolomite:: dardarkk graygray~, weatherweatherss graygray;; finelyfinely crystallinecrystalline;; massivmassivee anandd poorlpoorlyy bedded;bedded; pittepittedd weatherinweatheringg surfacesurface;; fossifossill fragments*o 2626

~. DolomiteDolomite:: graygray,? weatherweatherss lighlightt graygray;; gener­gener­ allallyy finfinee crystallinecrystalline;; poorlpoorlyy beddebeddedd andand somewhasomewhatt limylimy;; grittygritty~, pittepittedd weatheringweathering

surfacesurface;; leslesss resistantresistant.. .0 ... • • • . • ~•• ..• • . • • • ~8^8

55.. DolomiteDolomite:: ververyy mucmuchh liklikee ththee abovabovee unitunit bubutt mediumediumm crystallincrystallinee iinn texturetexture., .0 . • . 0 .• . 0 22

66.. DolomiteDolomite:: finelfinelyy crystallinecrystalline;; poorlpoorlyy bed­bed­ dededd anandd somewhasomewhatt limylimy;; ththee uppeupperr thirthirdd ofof thithiss uniunitt iiss leslesss resistanresistantt anandd occuroccurss inin scatterescatteredd outcropoutcrop;; containcontainss fossifossill frag-frag­

mentments.s ...... Cit • • • • • • • .0 • 0 . • 48hQ

77.. DolomiteDolomite:: dardarkk graygray,, weatherweatherss ththee same;same; poorlpoorlyy beddebeddedd anandd massivemassive;; finelfinelyy crystal­crystal­ linlinee bubutt weatherweatherss somewhatsomewhat friablefriable soso dolomitdolomitee "sand"sand"" mamayy bbee presenpresentt iinn thisthis intervalinterval;; abundantabundant "bulls-eye""bulls-eye" algaalgall (?)(?) bodiebodiess presenpresentt ••••••••••••• 0 • 0 1515

OFFSETOFFSET ACROSSACROSS FAULTFAULT

8.8, Dolomite:Dolomite: blackblack,, weatherweatherss darkdark graygray;; dense,dense, veryvery finefine crystalline;crystalline; abundantabundant lightlight graygray nodularnodular chertchert throughoutthroughout whichwhich weathersweathers lightlight brown;brown; medium-beddedmedium-bedded,, blockyblocky;; therethere isis a 6-foot6-foot bebedd ofof dolomitedolomite pebblepebble conglom­conglom­ erateerate aboutabout 8787 feetfeet aboveabove thethe base;base; 5050 feetfeet aboveabove thethe basebase therethere isis a beddingbedding planeplane whichwhich isis coveredcovered withwith trilobitetrilobite fragments;fragments; ProsaukiaProsaukia misamisa (Hall)(Hall) andand IdahoiaIdahoia sposp. 0. 0. 0. . 110110

9.9. Dolomite:Dolomite: darkdark gray,gray, weathersweathers lightlight gray;gray; generallygenerally finelyfinely crystallinecrystalline althoughalthough somesome mediummedium crystallinecrystalline texturestextures areare foundfound throughout;throughout; veryvery littlelittle chertchert isis presentpresent inin thistlllS unitUnrt ••••••00000900000*000 0 • 0 • 0 ••••••••0 0 11ll

10.10. Dolomite:Dolomite: darkdark graygray toto black;black; weathersweathers lightlight graygray toto rusty;rusty; thin~beddedthin-bedded toto flaggyflaggy withwith abundantabundant tabulartabular chert;chert; dolomitedolomite isis 1111

UnnameUnnamedd CambrianCambrian (?)(?) FormationFormation (Cont(Contoo )) ThicknessThickness inin feetfeet

finelyfinely crystallinecrystalline andand itsits beddingbedding isis well­well- defineddefined butbut somewhatsomewhat wavy;wavy; thisthis unitunit containscontains a I-foot1-foot dolomitedolomite pebble-conglomer­pebble-conglomer­ ateate aboutabout 1 footfoot aboveabove thethe base;base; thethe pebblespebbles areare blacblackk andand graygray andand rangrangee inin sizesize fromfrom 11 ttoo 5 millimetersmillimeters across;across; theythey areare sub-roundedsub-rounded toto wellwell rounderoundedd inin shapeoshape. •. 0. 0. e• 0. . 0 0. •. 0. . 0 1010

11.11. DolomiteDolomite:: darkdark gragrayy toto blacblackk weatheringweathering lightlight graygray;; massivemassive andand lessless well-bedded;well-bedded;

finefine crystallinecrystalline texturetexture throughoutthroughouto. 0• * 0 U. 0• 66

12.12. Dolomite:Dolomite: mottl$dmottled graygray andand blacblackk onon bothboth thethe freshfresh andand weatheredweathered surface;surface; ververyy densedense andand veryvery finelyfinely crystalline;crystalline; containscontains manymany small,small, black,black, oval-shapedoval-shaped andand roundedrounded peb-peb­ blesbles (?)(?) throughout .•••••••• ...... 0. 0. . • 0. 0. 3030

13.13• Dolomite:Dolomite: blackblack andand white,white, finelyfinely crystal­crystal­ lineline dolomitedolomite stripesstripes runningrunning parallelparallel toto thethe bedding;bedding; veryvery cherty;cherty; abundantabundant nodularnodular chert,chert, gray,gray, weatherinweatheringg lightlight brown.brown. 0... • • . • 33

Ilt.1km Dolomite:Dolomite: likelike NoNo.5;. 5; thisthis unitunit containscontains somesome graygray nodularnodular chertchert throughouthroughoutt whichwhich weatherweatherss ~ightlight browbrownn •••••.••. 0 • o • 3232

15.15. Dolomite:Dolomite: ligh~ightt gray,gray, weathersweathers gray-tan;gray-tan; densedense andand finelyfinely crystallinecrystalline texture;texture; thisthis unitunit formsforms a massivemassive andand resistantresistant ledge.ledge. •. •. 5353

16.16. Dolomite:Dolomite: darkdark graygray toto blackblack,, weatheringweathering ttoo a somewhatsomewhat mottledmottled graygray andand darkdark graygray colorcolor throughout;throughout; thethe lowerlower 5555 feetfeet ofof thisthis uniunitt isis cherty,cherty, containingcontaining gray,gray, nodu-nodu­ larlar chertchert whichwhich weathersweathers lightlight brown.brown. 0. 0. e.. . 171171

17.17. Dolomite:Dolomite: likelike thethe aboveabove unitunit butbut iiss lessless resistantresistant andand weathersweathers rounded .0 0• 0. 0• 0• 0. • 0 0. 5353

TotalTotal UnnamedUnnamed CambrianCambrian (?)(?) formationformation 688688

TheThe OrdovicianOrdovician SystemSystem

A completecomplete OrdovicianOrdovician sectionsection waswas foundfound andand measuredmeasured justjust \ southsouth andand westwest ofof thethe UtahUtah LimeLime andand StoneStone Company1sCompany's quarryquarry atat 12

Dolomite,Dolomite, Utah,Utah, inin sectionsection 25,2j, ToT« ISo,IS., R.R. 7W.7W.

ThreeThree distinctdistinct lithologiclithologic unitsunits areare presenpresentt here—here--aa 10w~low­ erer limestonelimestone sequencesequence witwithh prominenprominentt interbeddedinterbedded siltstone;siltstone; aa middlemiddle uniunitt ofof interbeddedinterbedded siltstone,siltstone, sandstonesandstone andand limestonelimestone cappedcapped bbyy a thinthin quartzite;quartzite; and,and, anan uppeupperr sequencesequence ofof finelyfinely - crystalline,crystalline, veryvery resistanresistantt dolomitedolomite beds.beds.

TheseThese formationsformations correlatecorrelate inin essentialessential detailsdetails witwithh thethe

OrdovicianOrdovician sectionsection ofof thethe LoganLogan quadranglequadrangle inin northeasternnortheastern

UtahUtah (Richards,(Richards, 1913)1913) andand areare accordinglyaccordingly consideredconsidered ttoo bebe thethe GardenGarden CityCity limestone,limestone, thethe SwanSwan PeaPeakk (?)(?) formationformation andand ththee FishFish HavenHaven dolomite.dolomite.

HintzeHintze (1951)(195D recognizedrecognized thethe GardenGarden CityCity limestonelimestone onon thethe westwest sideside ofof thethe StansburyStansbury RangeRange inin ththee vicinitvicinityy ofof

GrantsvilleGrantsville Peak.Peak. HeHe foundfound nono indicationindication ofof thethe upperupper quartzitequartzite membememberr ofof ththee SwanSwan PeakPeak formationformation there,there, althoughalthough hehe doesdoes mentionmention thethe presencepresence ofof a shalyshaly membermember ofof ththee SwanSwan

PeakPeak formationformation overlyingoverlying thethe GardenGarden CityCity strata.strata.

TheThe GardenGarden CityCity limestonelimestone andand ththee SwanSwan PeakPeak (?)(?) forma­forma­ tiontion areare faultedfaulted outout inin thethe southernsouthern partpart ofof sectionsection 36,36, T.T.

IS.,IS., R.R. 7W.,7W., andand southsouth ofof thisthis ththee onlyonly OrdovicianOrdovician stratastrata ex­ex­ posedposed areare ththee bedbedss ofof thethe upperupper FisFishh HavenHaven andand thesthesee areare faultedfaulted againstagainst MississippianMississippian rocks.rocks.

GardenGarden CityCity LimestoneLimestone

TheThe GardenGarden CityCity limestonelimestone consistsconsists ofof marinemarine lilimestonmestonee andand interbeddedinterbedded siltstonesiltstone whicwhichh conforconformablmablyy overliesoverlies CamCambriabriann dolomite.dolomite. 1313

ThereThere areare threethree broabr oadd lithologlithologiicc didivisionvisionss withiwithinn thithiss

forformationmation.. The basalbasal fourthfourth isis mmadad e upup ofof dardarkk gray,gray., finelyfinely

crystallinecrystalline limestonelimestone whichwhich weathersweathers generallygenerally gray.gray. ThisThis

unitunit containscontains somesome minominorr siltysilty bedsbedso. TheThe middlmiddlee halhalff ooff thethe

formationformation isis predominantlypredominantly interbeddedinterbedded limestonelimestone andand siltstone,siltstone,

withwith thethe latterlatter inin sufficientsufficient quantitiesquantities ttoo givgivee anan over-allover-all

bandedbanded appearanceappearance toto thisthis part.part. TheThe upperupper fourtfourthh ooff ththee forfor­­

mationmation weathersweathers withwith a distinctdistinct purplish-graypurplish-gray colorcoloro. IntrIntraa­-

formationalformational limestonlime~tonee pebble-conglomeratepebble-conglomeratess areare commoncommon

throughoutthroughout thisthis unitunit andand becomebecome moremore numerousnumerous neanearr ththee top.top.

- ThereThere isis a noticeablenoticeable siltsilt contentcontent butbut notnot inin enoughenough quantityquantity

toto causecause a rustyrusty weatheredweathered surfacesurfaceo.

TheThe correlationcorrelation ofof thisthis formationformation waswas mademade oonn ththee basisbasis

ofof lithologiclithologic andand paleontologipaleontologicc similaritysimilarity toto ththee typtypee sectionsection

ofof thethe GardenGarden CityCity limestonelimestone inin ththee RandolphRandolph quadranglequadrangle

(Richa~ds,(Richards, 1913).1913).

RossRoss (19;1)(195D hashas mademade anan extensivelyextensively detaileddetailed lithologiclithologic-­

andand paleontologicpaleontologic studystudy ofof thethe GardenGarden CityCity limestonelimestone atat itsits

typetype sectionsection andand inin otherother areasareas inin northeasternnortheastern Utah.Utah.

HintzeHintze (1951)(1951) correlatedcorrelated thethe lowerlower OrdovicianOrdovician sectionsection inin

thethe StansburyStansbury MountainsMountains aroundaround GrantsvilleGrantsville PeakPeak witwithh ththee Gar­Gar­

5 denden CityCity formationformation andand recognizedrecognized Ross g (1949(19^9,9 1951)1951) faunalfaunal

zoneszones f,"GttGM anandd "J"J"" iinn thithiss interval.interval.

TheThe authorauthor mademade a fossilfossil collectioncollection frofromm ththee uppeupperr partpart

ofof thethe GardenGarden CityCity limestonelimestone inin thethe unmappedunmapped westerwesternn areareaa ofof

thisthis reportreport inin sectionsection 16,16, T.T. IS.~IS., R.R. 7Wo7W. wherwheree ththee gentlygently

eastward-dippingeastward-dipping stratastrata formform a prominentprominent ridgridgee jusjustt southsouth andand 14 easteast ofof Timpie,Timpie, Utah.Utah. TheThe collectioncollection containscontains thethe followingfollowing trilobitestrilobites::

KirkellKirkellaa declevitadeclevita RossRoss zonezone nJI1"J"

TrigonoceraTrigonocera typicatypica RossRoss zone "H"

ThisThis fossilfossil collectioncollection agreesagrees mormoree closelyclosely withwith ththee fau­fau- nanall zoneszones nearnear ththee totopp ofof thethe GardenGarden CityCity formationformation atat itsits typetype sectionsection thanthan itit doesdoes withwith thosthosee foundfound inin thethe OpohongaOpohonga limestonelimestone ofof thethe TinticTintic district.district. HintzeHintze (1951)(1951) collectedcollected fossilsfossils neanearr thethe toptop ofof thethe OpohongaOpohonga limestonelimestone andand recognizedrecognized faunalfaunal zonezone "F""F" there.there. ThisThis zonezone isis foundfound inin thethe lowerlower partpart ofof ththee GardenGarden CityCity limestonelimestone inin itsits typtypee area.area.

TheThe followingfollowing sectionsection waswas measuredmeasured westwest ofof ththee quarryquarry neanearr Dolomite,Dolomite, Utah:Utah:

GardenGarden CityCity LimestoneLimestone ThicknessThickness inin feetfeet

1.1. Limestone:Limestone: darkdark gray,gray, weathersweathers toto a purp­purp­ lish-graylish-gray colorcolor throughoutthroughout witwithh somesome minorminor lightlight graygray coloring;coloring; thin-beddedthin-bedded,, finefine andand mediummedium crystallinecrystalline texturetexture;; containscontains somesome siltysilty partingspartings whichwhich weatherweather rustrustyy bubutt thesethese areare a ververyy subordinatesubordinate feature;feature; intraforma­intraforma- tionationall pebblpebblee conglomeratesconglomerates areare commoncommon throughouthroughoutt thisthis uniunitt andand areare foundfound toto bebe moremore numerousnumerous nearnear thethe top;top; ththee limestonelimestone pebblespebbles areare sub-roundedsub-rounded andand sub-angularsub-angular inIn shapeshape surroundedsurrounded bbyy a siltysilty matrixmatrix;; some-some­

whawhatt irregularirregular beddingbedding.. „0 Q« 0» 0< , 0* •o 0o 0„ 0 0 . 0 . 0 106106

2.2. Limestone:Limestone: darkdark gray,gray, weathersweathers lightlight graygray withwith a noticeablynoticeably pittepittedd surface;surface; thin~thin, blockblockyy beddinbeddingg throughoutthroughout;; therethere areare numer­numer­ ousous brownbrown siltsilt partingspartings presentpresent inin thisthis unitunit whichwhich weatheweatherr rustyrusty andand givegive a somewhatsomewhat

bandedbanded appearanceappearance atat a distance.distance, o0 0„ 0» 0« •» ••. . 269269

3.3. Limestone:Limestone: lightlight gray,gray, finelyfinely crystallinecrystalline limestonelimestone whichwhich weathersweathers gray;gray; thin-bedded;thin-bedded; 15

GardenGarden CityCity LimestonLimestonee (Conto)(Contc) ThicknessThickness iinn feetfeet

interbeddedinterbedded layerslayers ofof siltsilt whicwhichh weatherweather rustyrusty andand constituteconstitute probablyprobably aboutabout aa thirdthird ofof thethe unit;unit; a veryvery prominentlyprominently bandedbanded weatheringweathering surfacesurface o. ••. . 0. 0„ 0» . 0 o 0 •. o.. . 120120

4.k* Limestone:Limestone: darkdark graygray colorcolor weathersweathers lightlight gray;gray; finefine crystalline;crystalline; containscontains thinthin part­part­ ingsings ofof rustrust coloredcolored siltsilt inin subordinatesubordinate

amounts;amounts; pittedpitted weatheringweathering surface.surface. a0 . • <> 0 .•• . 118118

5.5* Limestone:Limestone: blue-gray,blue-gray, w~athersweathers gray;gray; , veryvery finefine crystalline;crystalline; mediummedium toto thin-bedded;thin-bedded; siltsilt partingspartings presentpresent inin minorminor amounts .••• .. . • 7373

6.6. Limestone:Limestone: muchmuch likelike No o. 5 butbut anan in­in­ creasecrease inin thethe siltsilt contentcontent givesgives thisthis unitunit a veryvery lightlight rustrust colorcolor onon thethe weatheringweathering surface.surface • • • • • • • • • • • • • • • 0 • • • 27274^

TotalTotal GardenGarden CityCity limestonelimestone 960960

(1) SwanSwai . n PeakPeak (?) FormationFormation

TheThe SwanSwan PeakPeak (?)(?) formationformation herehere consistsconsists ofof a sequencesequence

OfOf interbeddedinterbedded siltstones,siltstones, limestoneslimestones andand sandstonessandstones whichwhich areare cappedcapped byby a quartzite.quartzite.

TheThe contactcontact ofof thisthis formationformation withwith thethe overlyingoverlying FishFish

HavenHaven dolomitedolomite isis distinct,distinct, butbut thethe lowerlower boundarboundaryy waswas placedplaced tentativelytentatively wherewhere thethe "typical""typical" limestonelimestone lithologylithology ofof thethe

GardenGarden CityCity forma~ionformation givesgives wayway throughthrough a narronarroww zonezone ofof colorcolor changechange toto a lithologylithology ofof predominantlpredominantlyy highhigh siltsilt con­con­ tent.tent. ThisThis underlyingunderlying unitunit weathersweathers a deepdeep rusrustt ttoo orangeorange Qolorcolor throughoutthroughout inin contrastcontrast toto thethe purplishpurplish-gra- grayy bedbedss ofof thethe underlyinunderlyingg GardenGarden CityCity limestonelimestoneo.

HintzeHintze (1951),(195D, inin a regionalregional studystudy ofof ththee OrdovicianOrdovician~, 1616 recognizedrecognized a lowerlower shaleshale membermember butbut notnot thethe uppeupperr quartzitequartzite membermember ofof thethe SwanSwan PeakPeak formationformation onon thethe westwest sideside ooff thethe

StansburyStansbury Mountains.Mountains.

ItIt shouldshould bebe emphasizedemphasized thatthat thethe upperupper membermember ofof thethe SwanSwan

PeakPeak (?)(?) formationformation inin thethe areaarea coveredcovered byby thithiss studystudy iiss nonott a­a clean,clean, vitreous,vitreous, fucoidalfucoidal quartzitequartzite asas foundfound inIn ththee typtypee sec­sec­ tion,tion, bubutt ratherrather a combinationcombination ofof dirty,dirty, silty~silty, quartzitequartzite andand quartziticquartzitic sandstone.sandstone.

Dr.Dr. Stokes,Stokes, ~valWalte terr Sadlick,Sadlick, andand thethe authorauthor mademade a fosfossi 8ill collectioncollection inin thethe upperupper partpart ofof thethe formationformation inin sectionsection 36,3^-,

T.T. IS.,IS., R.R. 7W.7W.

TheThe followingfollowing fossilsfossils werewere identified:identified:

Brachiopods:Brachiopods:

FinkelnburgiaFinkelnburgia sp.sp. HesperonomiaHesperonomia dinorthidesdinorthides UlrichUlrich anandd CooperCooper zoneszones IIJII"J" andand "K""K" (?)(?)

Trilobites:Trilobites: LachnostomaLachnostoma latucelsumlatucelsum RossRoss zonezone IIJ""J" KirkellaKirkella declevideclevit taa Ros'sRoss zonezone "J""J"

1 cephlapodcephlapod (unidentifiable)(unidentifiable)

ItIt isis interestinginteresting toto notenote thatthat thethe fossilsfossils collectedcollected fromfrom thethe SwanSwan PeakPeak (?)(?) formationformation ofof thisthis areaarea correlatecorrelate withwith thethe faunalfaunal zoneszones lIJ","J", "K","K", oror IILII"L" (?)(?) \

TwoTwo interpretationsinterpretations seemseem evidentoevident0 ThisThis unitunit maymay bebe cor~cor­ relatedrelated eithereither withwith thethe uppeupperr chertycherty membermember ofof tbethe GardenGarden CityCity

formationformation onon thethe basisbasis ofof ththee faunalfaunal zoneszones representedrepresented bere~heres ~ oror correlatedcorrelated witwithh thethe SwanSwan PeakPeak formationformation onon ththee basisbasis ofof lithologiclithologic similarityosimilarity,, TheThe latterlatter procedureprocedure wouldwould seemseem toto agreeagree withwith Webb'sWebbfs (1949)(19^9) viewsviews asas advancedadvanced byby HintzeHintze (1951)(1951) inin hishis OrdovicianOrdovician study:study:

"Webb"Webb hahass shownshown thatthat bothboth ththee SwanSwan PeakPeak (?)(?) quartz=quartz- iteite ofof centralcentral UtahUtah andand ththee SwanSwan PeaPeakk formationformation ofof nortbeasternnortheastern UtahUtah areare olderolder thanthan thethe EurekaEureka quartz­quartz- iteite ofof Nevada.Nevada. TheThe SwanSwan PeakPeak (?)(?) quartzitequartzite isis regressiveregressive,, accordingaccording ttoo Webb,Webb, thinningthinning inin westernwestern UtahUtah toto disappeardisappear inin easterneastern Nevada,Nevada, gradinggrading intointo successivelysuccessively youngeryounger PogonipPogonip zoneszones westwardo"westward

TheThe followingfollowing intervalinterval waswas measuredmeasured westwest ofof DolomiteDolomite*~.

Utah:Utah:

SwanSwan PeaPeakk (?)(?) FormationFormation ThicknesThicknesss inin feetfeet

1.1. QuartziteQuartzite andand quartziticquartzitic sandstone:sandstone: dirty­dirty- graygray color,color, weatheringweathering rusty;rusty; dense,9 silty,silty, quartzitequartzite bedsbeds 1-61-6 inchesinches thick;thick; interbedded~interbedded, finefine grained,grained, silty,silty, quartziticquartzitic sandstonesandstone whichwhich weatherweatherss inin a box-work;box-work; sandstonesandstone con­con­ tainstains somesome calcitecaleite cement;cement; quartzitequartzite impure~impure, notnot atat allall likelike thethe clean,9 vitreous,vitreous, "typical""typical" SwanSwan PeakPeak quartzite;quartzite; thithiss uniunitt isis medium-medium- beddebeddedd •••••••••.•••••.•• 0 0 0 2222

2.2. Sandstone:Sandstone: darkdark graygray color,color, weathersweathers tantan toto rustrustyy withwith a grittygritty surface;surface; mediummedium toto tbin­thin- beddedbedded;; veryvery finefine grained,grained, containingcontaining muchmuch

silt;silt; thinthin quartziticquartzitic lenseslenses throughoutothroughout« 0„ 00 0 0 1166

3.3» Limestone:Limestone: blue-gray,blue-gray, weathersweathers thethe same;same; mediummedium crystalline;crystalline; containscontains mucmuchh siltsilt andand 1818

SwanSwan PeakPeak (?)(?) FormationFormat ion (Cont.)(Conto)i ThicknessThickness inin feetfeet

somesome quartzquartz grains;grains; thin-beddedthin-bedded anandd lessless resistanresistantt throughout .••• ... 0 . ••••••• o • 1212

4.km Siltstone:Siltstone: blue-gray,blue-gray, weatherweatherss tantan toto rustyrusty;; thin-beddedthin-bedded andand notnot ververyy resistant.resistant. •. •. 4k 5m Limestone:Limestone: likelike NoNo.3;. 3; thin-beddedthin-bedded toto shaly; forms a non-resistant slope 0.... 0 0 . 22 shaly; forms a non-resistant slopeo0 • • 22 6.6m Siltstone:Siltstone: likeiike NoNo.4;. k; weathersweathers orange-orange- rusrust t...... 0 0 0 • • 22

7.7* Sandstone:Sandstone: gray,gray, weatherweatherss thethe same;same; veryvery finefine grained;grained; containscontains abundantabundant siltsilt part­part­ ings;ings; thethe siltsilt partingspartings weatherweather rusty,rusty, givinggiving a bandedbanded effecteffect ttoo thethe unitunit asas aa wholewhole;; thin-beddedthin-bedded ••••••••••• 0 • • 3838

8.8. Siltstone:Siltstone: darkdark gray,gray, weathersweathers toto a bril­bril­ liantliant rusty-orangerusty-orange color;color; containscontains somesome limylimy siltsilt partings.partings • • • • •• •• • • • 11

TotalTotal SwanSwan PeakPeak (?)(?) formationformation 117117

FishFish HavenHaven DolomiteDolomite

TheThe FisFishh HavenHaven dolomitedolomite consistsconsists ofof dense,dense, finelyfinely cry­cry­

stalline,stalline, darkdark graygray ttoo blacblackk dolomitedolomite bedbedss which,which, inin outcrop,outcrop,

formform a resistantresistant hillhill aboveabove ththee generallygenerally lessless resistantresistant

slope-formingslope-forming SwanSwan PeakPeak (?)(?) andand GardenGarden CityCity formations.formations.

AlternatingAlternating bedsbeds ofof blackblack,, gray,gray, oror mottledmottled dolomitedolomite

lendlend a distinctlydistinctly bandedbanded patternpattern toto thithiss formationformation asas a wholewholeo.

TheThe basabasall one-fourthone-fourth isis moremore massivemassive inin charactercharacter thanthan

thethe overlyingoverlying partpartss whichwhich areare mediummedium toto thick-beddedothick-bedded. TheThe

upperupper one-fourthone-fourth hashas a distinctivedistinctive nearlynearly lithographiclithographic tex-tex­

tureture.. 1199

ThThee bottobottomm halhalff ooff ththee formatioformationn iiss fossiliferous,fossiliferous, beinbeingg mormoree ssoo towartowardd ththee basebase.. HalysiteHalysitess spsp.. araree fairlyfairly plentifulplentiful,, anandd manmanyy solitarsolitaryy coralcoralss resemblinresemblingg StreptelasmaStreptelasma ar~ree scatterescatteredd throughouthroughoutt thithiss fossiliferoufossiliferouss intervalinterval. 0 Frag­Frag­ mentmentss ooff crinoicrinoidd columnalcolumnalss araree fairlfairlyy commoncommon,, anandd ononee smallsmall - grougroupp ooff coloniacoloniall coralcoralss wawass notedonoted.

ThiThiss serieseriess ooff dolomitedolomitess iiss tentativeltentativelyy correlatecorrelatedd withwith ththee FisFishh HaveHavenn dolomitdolomitee ooff ththee RandolpRandolphh quadranglquadranglee iinn north­north­ erernn Utautahh (Richards(Ri'chards,, 1913).1913)•

ThThee followinfollowingg sectiosectionn iiss presenpresentt weswestt ooff DolomiteDolomite,, Utah~Utah:

FisFishh HaveHaven• n DolomitDolomitet i e ThicknessThickness iinn feetfeet

1.1. DolomiteDolomite:: darkdark gragrayy toto blackblack,, weathersweathers graygray anandd dardarkk gray;gray; texturtexturee almostalmost litho­litho­ graphic;graphic; medium-beddemedium-beddedd anandd blockyblocky;; nono fossils ...... • • 2626 2.2. Dolomite:Dolomite: lightlight gray,gray, weathersweathers toto aa whitish-gray;whitish-gray; d~nse,dense, nearlynearly lithographiclithographic texture; pitted weathering surface. 0 0 , • , , 8,3 texture; pitted weathering surface. 0 c • • 3. Dolomite:Dolomite: dense,dense, finelyfinely crystalline;crystalline; darkdark gray,gray, weathersweathers graygray onon a pittedpitted surface;surface; medium-bedded .•••••••••• • 0 • 0 •• 6262

4.km Dolomite:Dolomite: graygray andand black;black; weathersweathers alter­alter­ natelynately inin lightlight graygray andand mottledmottled bands;bands; dense;dense; medium-beddedmedium-bedded becomingbecoming thick-beddedthick-bedded nearnear thethe top;top; pittedpitted weatheringweathering surface .••• . . 6262

5. Dolomite:Dolomite: medium-bedded,medium-bedded, black;black; weathersweathers mottledmottled onon a pittedpitted surface;surface; manymany whitewhite ~* dolomite veins...... 0. 0. •. 0, 0 , 0 • 60 dolomite veins ••••••••• 0 0 60 •« 6.6. Dolomite:Dolomite: dense,dense, finelyfinely crystalline;crystalline; black,black, weatheringweathering inin alternatealternate darkdark andand lightlight graygray bands;bands; medium-bedded;medium-bedded; fossilsfossils veryvery scarce;scarce; HalysitesHalysites sp.:sp.: moremore fossiliferousfossiliferous nearnear thethe

basbase e .• •. •• •• •• •a •• 0o 0o 0• •• 0o •• •. 0o aQ o0 0 0 0 0 e 0 0 0 51 2020 •t FishFish HavenHaven DolomiteDolomite (Cont.)(Cont.) ThicknessThickness inin feetfeet

7. Dolomite:Dolomite: dense,dense, black;black; bandedbanded weather-weather­ inging surfacesurface likelike NooNo, 6;6; bedbedss thick,thick, generallygenerally 3 feetfeet oror greater;greater; fossiliferous,fossiliferous, especiallyespecially inin thethe upperupper part;part; crinoidcrinoid colum­colum- nalsnals andand HalysiteHalysitess spo;sp*; veryvery fewfew StreptelasmaStreptelasma (?)(?) SPasp. notenotedd andand onlyonly oneone poorlypoorly preservedpreserved colonialcolonial coral.coral • • • • •...... ••• • • • • • 0 0 •••« 78

8.8. Dolomite:Dolomite: darkdark graygray toto blackblack,, weathersweathers darkdark graygray andand mottledmottled oonn a pittepittedd surface;surface; dense;dense; massive;massive; abundantabundant HalysitesHalysites sposp© atat

0 0 0 thethe basbasee ofof thithiss uniunitt ••••••.•• „ 0 . 109109

9. Dolomite:Dolomite: dense,dense, finelyfinely crystalline;crystalline; darkdark gray,gray, weathersweathers lightlight gray;gray; somewhatsomewhat mot-mot­ tledtled onon a pittepittedd weatheringweathering surface;surface; mas­mas­ sive;sive; fossiliferous;fossiliferous; crinoidcrinoid columnalscolumnals andand StreptelasmaStreptelasma (?)(?) SPasp, noted ,•• ..»•*.< 0 0 0 • , 0 •••. • • 3232

TotalTotal FishFish HaveHavenn dolomitedolomite 563563

TheThe DeVonianDevonian SystemSystem

NoNo representationrepresentation ofof thethe SilurianSilurian systemsystem waswas observedobserved I inin thethe areaarea studiesstudies andand DevonianDevonian stratastrata overlieoverlie thethe Ordovi-Ordovi­ ciancian FishFish HavenHaven dolomitedolomite withwith nnoo apparentapparent angularangular discord-discord­ ance.ance. AnAn unbrokenunbroken sectionsection ofof DevonianDevonian rocksrocks withwith summitsummit andand basebase exposedexposed waswas foundfound andand measuredmeasured inin thethe FluxFlux areaareao.

Here,Here, ththee basebase ofof thethe DevonianDevonian sectionsection isis tentativelYtentatively placedplaced bbyy ththee authorauthor atat thethe firstfirst distinctdistinct lithologiclithologic breakbreak aboveabove typicaltypical FishFish HavenHaven dolomitedolomite bedsobeds. OnOn thisthis basisb~is,, ththee lowestlowest

DevoniaDevoniann stratumstratum isis a non-resistannon-resistantt Slope-formerslope-former whicwhichh isis mainlymainly coveredcovered andand abruptlyabruptly overliesoverlies resistantresistant dolomitedolomite ledgesledges ofof FishFish HavenHaven lithologyolithology. ItIt isis quitequite probablprobablee thatthat thethe coveredcovered intervalinterval representsrepresents a transitiotransitionn upwardsupwards intointo 2121 thethe overlyingoverlying dolomitedolomite pebble~conglomeratepebble-conglomerate bedobed.

TheThe DevonianDevonian sectionsection measuremeasuredd inin ththee FluFluxx areaarea maymay bebe sub-dividedsub-divided intointo 6 lithologiclithologic unitunitss asas follows:follows: (1)(1) a basalbasal unitunit composedcomposed chieflychiefly ofof finelyfinely crystalline~crystalline, blackblack,, dolomitedolomite bedsbeds whichwhich areare somewhatsomewhat siltysilty andand containcontain thinthin bedsbeds ofof dolo-­dolo-- mitemite pebble-conglomerate;pebble-conglomerate; (2)(2) calcite-cementedcalcite-cemented sandstonesandstone whichwhich containcontain somesome interbeddedinterbedded sandysandy dolomite;dolomite; (3)(3) a thickthick sequencesequence ofof marinemarine dolomitedolomite conglomerateconglomerate withwith associatedassociated in-in­ terbeddedterbedded quartzites.quartzites. ThisThis uniunitt formsforms bbyy farfar ththee thickestthickest partpart ofof thethe DevonianDevonian sectionsection inin thisthis area,area; (4)(*+) a coveredcovered in­in­ tervalterval ofof softsoft materialmaterial whichwhich formsforms a non-resistantnon-resistant saddlesaddle thatthat cancan bebe tracedtraced withwith certaintycertainty alongalong thethe easterneastern sideside ofof ththee rangrangee inin thisthis area.area. DiggingDigging inin thithiss intervalinterval yieldedyielded somesome piecespieces ofof fine-grainedfine-grained sandstonesandstone andand yelloyelloww andand orangeorange siltstones;siltstones; (5)(5) mottlemottledd limestone;limestone; (6)(6) a thithinn dolomitedolomite unitunit whichwhich containscontains scatteredscattered quartzquartz grainsgrains throughoutthroughout andand be-be­ comescomes increasinglyincreasingly sandysandy upwardsupwards gradinggrading intoInto a l2-foot12-foot quartzitequartzite bebedd withwith 4-6*f-6 inchesinches ofof reliefrelief onon ththee upperupper surfaceosurface. TheThe erosionalerosional contactcontact witwithh thethe overlyingoverlying basabasall MississippianMississippian dolomite beds may be seen in section 30, T« IS., R. 6W in dolomite beds may be seen in section 30, To ISo, Ro 6w oe?, in ththee lowlow saddlesaddle jusjustt easteast ofof thethe quarryquarry atat DolomiteDolomite~, UtahoUtah. ThisThis unconformitunconformityy correlatescorrelates welwelll witwithh ththee erosionalerosional breakbreak atat ththee toptop ofof ththee thickthick DevonianDevonian quartzitequartzite sequencesequence onon Stans­Stans­ bury Island. (Hughes, personal communication, 195V). bury Island. (Hughes, personal communication 9 1954)0 TheThe basalbasal dolomitedolomite andand sandstonesandstone unitsunits werewere measuremeasuredd inin sectionsection 25,25, T.T. IS.,IS., R.R. 7Wo,7W., inin thethe saddlesaddle ofof a hillhill duedue southsouth 2222 ofof thethe plantplant atat Dolomite,Dolomite, Utah.Utah. TheThe remainderremainder ofof thethe sectionsection waswas measuredmeasured inin partpartss ofof sectionsection 6,6, T.T. 2S2S.o, R.R. 6We,6W., andand sec-sec­ tiontion ·'1l,, T.T. 2S.,2S., R.R. 7W.,7W., unsurveyed.unsurveyed.

TheThe authorauthor collectedcollected somesome poorlypoorly preservedpreserved brachiopodsbrachiopods fromfrom thethe limestonelimestone intervalinterval whichwhich lieslies beneathbeneath ththee upperupper quartzitequartzite unit.unit. ThisThis collectioncollection waswas mademade inin BroadBroad Canyon,Canyon, inin sectionsection 12,12, T.T• 2S.,2S., R.R. 7Wo7W. TheseThese werewere examinedexamined bbyy WalterWalter

SadlickSadlick whwhoo reportedreported ofof oneone specimen:specimens

"A"A badlybadly crushedcrushed specimenspecimen withwith nono exteriorexterior preser­preser­ ved.ved. TheThe outlineoutline isIs ofof a CyrtospiriferCyrtospirifer typetype.. InIn addition,addition, thethe dentaldental laminaelaminae areare alsoalso ofof a Cyrto­Cyrto­ spiriferspirif er type.type. OnOn thatthat basisbasis alone,alone, thethe specimenspecimen hahass affinitiesaffinities withwith Devonian-typeDevonian-type ofof brachiopods.brachiopods. However,However, thethe pre-Madisonpre-Madison MississippianMississippian brachiopodsbrachiopods areare poorlypoorly known,known, andand forfor thatthat reasonreason a definitedefinite ageage assignmentassignment cannotcannot bebe given."given."

OfOf thethe twotwo moldsmolds whichwhich werweree obtained,obtained, SadlickSadlick statestated~d %

"These"These moldsmolds resembleresemble thethe genusgenus PaurorynchaPauroryncha onon thethe basibasiss ofof a deepdeep andand widwidee sulcus.sulcus. TheThe foldfold hashas 66 ribsribs similarsimilar toto thosethose ofof P.P. endlichi.o I havehave nevernever seenseen anythinganything likelike thisthis inin thethe Mississippian."Mississippian."

InIn thethe summersummer ofof 1954,1951+, Mr.Mr. SadlickSadlick visitedvisited thisthis areaarea andand collectedcollected fossilsfossils fromfrom thethe samesame intervalInterval jusjustt easteast ofof thethe quarryquarry atat Dolomite,Dolomite, UtahUtah,, andand aboutabout 12-1512-1^ feetfeet beneatbeneathh thethe upperupper quartzitequartzite bed.bed. HeHe identifiedidentified thesethese definitelydefinitely asas

PaurorynchaPauroryncha endlichi.endlichi. InIn discussingdiscussing thisthis form,form, StokesStokes reports:report

"At"At thethe presentpresent time,time, thisthis isis consideredconsidered toto bbee aa DevonianDevonian formform butbut ifif furtherfurther studystudy ofof^typ, typee sec­sec­ tionstions provesproves itit toto bebe Mississippian,Mississippian, ththee StansburyStansbury sectionsection willwill havehave toto bebe revisedrevised accordingly."accordingly." - Mr.Mr. , SadlickSadlick alsoalso collectedcollected a fishfish toothtooth somesome 50JO feetfeet be-be­ neatneathh thethe upperupper quartzitequartzite bed.bed.

AtAt thethe suggestionsuggestion ofof WmoWin. L.L. Stokes,Stokes, thethe namnamee "Stansbury"Stansbury 2323 formation"formation" isis herebyhereby proposeproposedd forfor ththee DevonianDevonian outcropsoutcrops inin thethe northernorthernn StansburyStansbury RangeoRange. EquivalentsEquivalents areare foundfound alsoalso onon

StansburyStansbury "Island""Island" andand probablyprobably atat thethe CityCity CreekCreek SalientSalient nearnear

SaltSalt LakeLake City,City, UtahUtah.. AdditionaAdditionall informationInformation onon thethe arealareal ex-ex­ tenttent ofof thisthis unitunit willwill bebe reportereportedd atat a laterlater date.date.

'T' TheThe unitunit isis typicallytypically developeddeveloped inin sectionsection 6,6, T~.. 2S2S. .. , R« ..

6w.6W. , andand sectionsection 1,1, ToT. 2S2S.o,'1 R. .. 7W7¥ (unsurveyed) ... HerHeree thethe

StansburyStansbury formationformation isIs representedrepresented inin thethe followingfollo\tfing lithologiclithologic sequence:sequence: (1)(1) basabasall dolomitedolomite beds;beds; (2)(2) sandstone;sandstone; (3)(3) dolo­dolo­ mitemite conglomerate;conglomerate; (h)(~) siltstone;siltstone; (5)(5) limestone;limestone; (6)(6) thinthin dolomitedolomite withwith "floating""floating" quartzquartz graingrainss gradinggrading upwardsupwards intintoo aa quartzitequartzite atat ththee top.top. A detaileddetailed sectionsection isis givengiven inin thisthis re-re­ porportt pp.pp. 27-31.27-31.

TheThe difficultydifficulty inIn makingmaking a positivepositive correlationcorrelation ofof thisthis stratigraphicstratigraphic sequencesequence witwithh recognizedrecognized DevonianDevonian sectionssections inin nearbnearbyy areasareas ledled toto thethe introductionintroduction ofof a newnew namnamee forfor thethe outcropsoutcrops ofof DevonianDevonian ageage inin thethe northernnorthern StansburyStansbury RangeRange ...

TheThe DolomitDolomitee ConglomerateConglomerate

TheThe mostmost unusuaunusuall stratigraphicstratigraphic unitunit inIn thethe FluxFlux areaarea isis thethe thicthickk accumUlationaccumulation ofof dolomitedolomite conglomerateconglomerate whicwhichh com­com­ priseprisess mostmost ofof ththee DevonianDevonian sectionsection there..there. TheThe conglomerateconglomerate isis mademade uupp mostlymostly ofof unsortedunsorted dolomitedolomite pebblespebbles,, cobblescobbles andand boulders,boulders, enclosedenclosed inin a dolomitedolomite matrixmatrix... QuartziticQuartzitic matrixmatrix- occursoccurs inin minominorr amountsamounts andand isis oftenoften associatedassociated witwithh thethe in-in­ terbeddedterbedded quartzitesquartzites whichwhich occuroccur inin thethe sectionsection ... 242k

OneOne strikingstriking featurefeature whichwhich maymay bebe observedobserved throughoutthroughout thethe entireentire thickJ:1essthickness ofof thisthis unitunit isis thethe unsortedunsorted naturenature ofof thethe componentcomponent fragments.fragments. TheseThese werewere oftenoften oobservebservedd toto rangerange fromfrom 11 millimillimetemeterr toto 3030 centimeterscentimeters inin dimensidimensioonn in,in, oror par­par­

tiallytially in,in9 anyany givengiven squaresquare footfoot ofof outcropoutcrop surface.surface.

A sizesize analysisanalysis waswas takentaken ofof a randomrandom eexposurxposuree ofof thethe conglomerate.conglomerate. ToTo accomplishaccomplish this,this, a tapetape measuremeasure waswas laidlaid outout alongalong lOOfe~t100 feet ofof thethe conglomerateconglomerate exposureexposure perpendicularperpendicular toto thethe strikestrike ofof thethe beds.beds. TheThe sizesize ofof anyany rockrock fragmentfragment onon oneone sideside ofof thethe tapetape alongalong thisthis lineline waswas recordedorecorded. SinceSince thethe visiblevisible outlinesoutlines representrepresent onlyonly a two-ditwo-dimensionamensionall Vievieww,, thethe longestlongest exposedexposed dimensiondimension ofof eacheach fragmentfragment wawass recordedrecorded witwithh thethe assumptionassumption that hatt thisthis woulwouldd givegive anan averageaverage didiameteame terr whenwhen thethe larglargee numbernumber ofof frfragmentagmentss foundfound inin suchsuch anan inintervaterval isis consideredconsidered.. OnlyOnly diadiametermeterss ofof 1 centicentimetemeterr oror ggreatereaterr werewere recorded. The maximum size encountered was 74l centimeters o recorded. The maximum size encountered was 7b centimeters0

FroFromm thesethese data,data, a cumulativecumulative sizesize frequencyfrequency curvcurvee andand a sizesize frequencfrequencyy histograhistogramm werweree constructeconstructedd (Se(Seee Figs .0 33_.--&,&4) k) 0. _ ,.i;

ThThee sizesize frequencfrequencyy curvcurvee showshowss a fairlyfairly highighh degredegreee ofof sortinsortingg iinn ththee componencomponentt sizes~zess ranginrangingg frofromm 1 ttoo 9 centi­centi­ metersmeters.. ThiThiss sizesize rangrangee accountaccountss foforr 664^ percenpercentt ofof thethe numbenumberr ooff rocrockk fragmentfragmentss recordedrecordedo. HoweverHowever,, tht hee breabreakk iinn thethe curvcurvee abovabovee ththee 9 centimetecentimeterr sizesize anandd ththee 3 breakbreakss iinn ththee re­re­ maindemainderr ooff ththee curvcurvee attesattestt ttoo ththee degredegreee ooff laclackk ooff sortingsorting presenpresentt iinn ththee uniunitt aass a wholwholee whewhenn ththee volumvolumee representerepresentedd byby thesthesee largelargerr fragmentfra~mentss Iiss ~onsideredoconsidered. 100

<~> 90

80 < 70 . ~u Z ... C< > =>60 ...(» III: ~ < III eo - > <> 5 <> :: 40 < 2 1~ ( => > u <> 30 ~ 000° 0o 0o 20 dl00 00 ~.f 10 -'" OC ;ii9 ,0 .... ~ 100 50 1010 5 DIAMETERDIAMETER ININ eH.CN.

Fig.Fig. 3 CumulativeCumulative sizesize frequencyfrequency curvecurve ofof conglomerateconglomerate inin thethe StansburyStansbury formation.formation. 25

ThThee predominancpredominancee ofof dolomitedolomite fragmenfragmenttss inIn thisthis coconglomnglom-­ erateerate isIs unusualunusual.. TheThe onlyonly ddeviatioeviationn fromfrom thisthis compositioncomposition isis thethe presencpresencee ofof a fewfew redred quartziticc cobblescobbles andand pebblespebbles scatteredscattered througthroughh tthhee uppeupperr partpart of thethe section.. A thinthin inIn­­ tervalwithlimyterval with limy mamatritrixx waswas ffounoundd nearnear thethe middmiddllee ofof tthhee sectsectioi onn butbut thithiss ccoulouldd nonott bebe tracedtraced laterlaterallallyy forfor anyany appapprere-­ ciableciable distance.distance.

Roc k typetypess cocommommonn ttoo tthhee UppeUpperr CCambriaambriann sectionsection ofof thethe areaarea areare representedd bbyy a vvarietarietyy ofof ddolomitolomitee frfragmentsagment s~, somesome mmottleottledd andd cchertyherty,, oothertherss ooliticoolitic (?)(?) oror containincontaining

"twiggy""twiggy" bodiesbodies,, andand a feww whicwhichh aarr ee siltsilty y. o RoRocck ttypeypess ooff

• I.'" thethe OrdoviciOrdoviciaann FishFish HaveHavenn dolomite,, incincludinludingg ggrayish-whiter ayish-white,, nearlnearlyy litlithographihog r aphicc dolomite,, andand blue-graybl ue- gray,, finefinell yy crcrystalystal­­ lineline dolomite,dolomite, areare identifiable. . ThereThere areare alsoo a fewfew frfragmentagmentss ofof vverer yy finefine ggrainerainedd quaquartzitrtzitee whicwhichh resembleresemble tthhee

SwanSwan PeakPeak.. TheThe GardenGarden Cityy lithololithologiesgies,9 ifif presentpresent,, aarree dolomitizeddolomitized beyondbeyond recognitionrecognition.. ItIt isis sugsuggestegestedd thathatt thethe lessless resistantresistant siltyy limestoneslimestones ofof thisthis formaformatiotionn woulwouldd bebe mormoree solublesoluble henchencee woulwouldd notnot asas lilikelkelyy bebe includedincluded inin tthihiss depositdeposit inin anyany ggreareatt amountamount..

TheThe frafragmentgmentss areare genegenerallrallyy sub-roundedsub-rounded toto rounderoundedd inin shapeshape andand ththee matrima trixx aaccountccountss forfor onlyonly a minomi no~r proportioproportionn ofof ththee totaltotal volumevolume.. FairlFairlyy wwelell defineddefined beddinbeddingg isis prepresensentt throughouthroughoutt thit hiss interintervalval..

ThereThere areare 12371237 feetfeet ofof conconglomeratglomeratee presenpresentt wherewhere thethe sectionsection waswas mmeasureeasuredd bubutt jusjustt 2 miless southsouth ofof thisthis locationlocation ~60 ~------~

50

III N US 20

10

o o 10 'S 20 25 30 15 40 411 !SO 55 60 65 70 75 DIAMETERDIAMETER ININ CMeM..

FigFig.. 4 SizeSize frequencyfrequency histogramhistogram ofof conglomerateconglomerate inin thethe stansburyStansbury formation.formation. 2266 onlyonly 22ti feetfeet ofof conglomerateconglomerate areare presentpresent onon ththee northnorth ssidi dee ofof

MinersMiners Canyon.Canyon. OOnn thethe southsouth sideside ofof MinersMiners Canyon,Canyon, GardenGarden

CityCity stratastrata areare foundfound notnot farfar belobeloww thethe basbasee ofof thethe Mississip­Mississip­ pianpian stratastrata andand therethere isis a distinctdistinct angularangular discordancediscordance be­be­ tweentween thethe twotwo.. OnOn ththee northnorth sideside ofof thethe samesame cnayon,cnayon, thethe conglomerateconglomerate andand thethe uppeupperr unitsunits ofof thethe StansburyStansbury formationformation underlieunderlie thethe bas~lbasal MississippiaMississippiann stratastrata withwith nono apparentapparent angu­angu­ larlar differencediffe~ence.. TheThe relativerelative displacementdisplacement betweenbetween thethe pre­pre-

MississippianMississippian bedsbeds onon,-eithe,' eitherr sid!?side ofof thethe canyoncanyon isis suggestivesuggestive ofof pre-Mississippiapre-Mississippiann uplifupliftt toto thethe south,south, whichwhich waswas a sourcesource foforr thethe conglomerateconglomerate deposit.deposit.

AnotherAnother possiblpossiblee sourcesource forfor thisthis conglomerateconglomerate isis presentpresent inin thethe TimpieTimpie Area,Area, sectionssections 2222 andand 27,27, T.T, IS.,IS., R.R. 7W.7W. where,where, aboutabout 150150 feetfeet ofof GardenGarden CityCity stratastrata overlieoverlie ththee CambrianCambrian rocksrocks conformablyconformably bubutt areare inin turturnn overlainoverlain bbyy basab~sall Missis­Missis­ sippiansippian stratastrata withwith anan angularangular discordancediscordance ofof aboutabout 2020 degreesdegrees

(Fig.(Fig. ,5.'b)5b) •.. iI':..

TheThe conglomerateconglomerate restsrests under,under, against,against, andand alsoalso overlaps,overlaps, a repeatedrepeated sectionsection ofof FishFish HavenHaven stratastrata inin thethe areaarea ofof tthhee quarryquarry atat DolomiteDolomite,, Utah.Utah. ThisThis repetitionrepetition ofof stratastrata isis be­be­ lievedlieved ttoo bbee thethe resultresult ofof a sharpsharp uplifupliftt ttoo thethe westwest whichwhich causedcaused a largelarge massmass ofof thethe FishFish HavenHaven dolomitedolomite toto slideslide intointo thethe areaarea ofof depositiondeposition wherwheree itit wawass eventuallyeventually inundatedinundated byby conglomerateconglomerate (Fig.(Fig. ~£>>.)<><,, ~ ) o Q TheThe erosionalerosional surfacesurface onon toptop ofof thisthis displaceddisplaced rockrock bodbodyy wouldwould seemseem toto indicateindicate thathatt atat leasleastt parpartt ofof thethe timetime itit wawass eithereither emergentemergent oror waswas subjectsubject toto thethe scouringscouring actionaction ofof ththee waveswaves.. ItIt isis certaincertain thatthat itit waswas FigoFigo 5a5a AngulaAngularr unconformitunconformityy betweenbetween thethe conglomerconglomer=­ ateate membermember ofof thethe StansburyStansbury formationformation anandd thethe repeatedrepeated FishFish HavenHaven dolomitedolomite (Of(Ofh h)) atat Dolomite,~ UtahoUtaho

FigoFigo 5b5b AngulaAngularr unconformityunconformity betweebetweenn ththee basabasall Mis=Mis­ sissippiansissippian dolomitedolomite (Cu)(Gu) andand thethe GardenGarden CityCity stratastrata

(Ogc)(Ogc) inin thethe TimpieTimpie area0o TheThe unnameunnamedd CambrianCambrian (?)(?) formationformation (Su)(Su) outcropsoutcrops inin thethe foregroundforegroundo0 2727 fullyfully submergedsubmerged laterlater becausebecause thethe toptop isis coveredcovered withwith an esti­esti matematedd ,0-7,50-75 feetfeet ofof conglomeratconglomeratee whicwhichh overliesoverlies itit withwith anan angulal"angular discordancediscordance ofof aboutabout 2200 degreesdegrees (Fig.(Figo ,a)5a)o • . «• ,.

In'summaryIn'summa~y,* ththee notablenotable featuresfeatures ofof thethe conglomerateconglomerate aregare

(1)(1) a widewide rangrangee ofof fragmentfragment size;size; (2)(2) poorpoor sortingsorting exceptexcept inin ~ thethe smallersmaller components;components; (3)(3) compositioncomposition ofof predominantlpredominantlyy ononee rGOkrock type;type; (~)(k) sub-roundedsub-rounded toto rounderoundedd shapeshape ofof thethe fragrnentfragmentss~g

(,)(5) thethe depositdeposit isis wedge-shapewedge-shapedd andand relativelyrelatively veryvery thick;thick;

(6)(6) fairlyfairly wellwell defineddefined bedding;bedding; (7)(7) thethe matrixmatrix hahass thethe samesame compositioncomposition asas thethe rocrockk fragmentsfragments andand makemakess upup onlyonly a smallsmall partpart ofof totaltotal volumevolume ofof ththee deposit.deposit*

ThThee generalgeneral physicalphysical characteristicscharacteristics ofof thethe conglomerateconglomerate

(i.e.(i.e. componentcomponent size,size, shape,shape, andand sorting)sorting) areare remarkablremarkablyy simi­simi larlar ttoo thosthosee ofof ththee ProvoProvo shorelineshoreline depositsdeposits inin thisthis areaarea withwith thethe exceptionexception thatthat ththee latterlatter hahass ververyy littlelittle matrixmatrix (Figs.(Figs. 7.87i 8 & 9).9). -- . TheThe followingfollowing DevoniaDevo~iann sectionsection waswas measuredmeasured inin ththee FluxFlux area:area: .

StansburyStansbury Form~tionFormation ThicknessThickness inin feetfeet

1.1. Quartzite:Quartzite: lightlight brownbrown ttoo tantan~, weathersweathers rustyrusty;; medium-beddedmedium-bedded;; constituentconstituent quartzquartz grainsgrains areare sub-angularsub-angular andand poorlpoorlyy sortedsorted asas toto size;size; becomebecomess dolomiticdolomitic towartowardd thethe , basebase;; *f-4-66 inchesinches ofof relierelieff onon thethe toptop pre­pre­ sentsent atat ththee nortnorthh endend ofof ththee area.area. •. •. •0 •. .o •. 1212

2.2. Dolomite:Dolomite: darkdark gray~gray, weathersweathers tan-gray;tan-gray; finelyfinely crystalline;crystalline; "floating'floating11n quartzquartz graingrainss throughoutthroughout,, mormoree numerounumerouss nearnear thethe toptop;; quartzquartz grainsgrains areare sub-angularsub-angular inin shapeshape andand varvaryy inin sizesize fromfrom 1-31-3 millimeters .••• ... 0 . • 99 w E

~~-- ______~s~s~ ss.. ~m~e~m~b~e~r~o~f~S~t~a~n~Sb~U~r~Y~f~m~member of Stansbury fm.. ____------J I ---- dolo.. membem emberr ooff StcnsburStiJ"sburyy fmfm..

FisFishh HaveHavenn dolomitdolomitee (Of(Ofh h))

HypotheticaHypotheticall conditionconditionss aatt timtimee ooff depositiodepositionn ooff sandstonesandstone membememberr ooff StansburStansburyy formationformation.. IncipienIncipientt uplifupliftt ttoo thethe weswestt commencecommencess ttoo supplsupplyy coarscoarsee sediments.sediments.

sea

. 5Sss. ---___ 2 _.-- --~ ^^^^^ Ofh ------=.' ' *——- „ dolo..

ContinueContinuedd uplifupliftt createcreatess highlanhighlandd frofromm whicwhichh coarscoarsee conglomer­conglomer­ atatee iiss derivederivedd anandd alsalsoo opportunitopportunityy foforr dislocatiodislocationn ooff largelarge blocblockk bbyy gravitgravityy sliding.sliding.

sea

DestructioDestructionn ofof highlanhighlandd produceproducess ththee conglomerateconglomerate membememberr ofof thethe StansburyStansbury formationformation whicwhichh burieburiess ththee larglargee blockblockss ofof FishFish Haven.Haven. LateLaterr sedimentssediments covercover conglomerateconglomerate andand unconformity.unconformity.

Ogc

PresentPresent structurestructure ofof FluxFlux area.area

Fig.Fig. 6 PossiblePossible explanatipnexplanation forfor repeatedrepeated FishFish HavenHaven inin thethe northernnorthern StansburyStansbury Range.Range. 2828

StansburyStansbury FormatioFormationn (Cont(Cont>o )) ThicknessThickness inin feetfeet

3.3. Limestone:Limestone: darkdark gray~gray, weathersweathers a distinct­distinct­ lyly mottlemottledd graygray andand blackblack color;color; finelyfinely crystalline,crystalline, somewhatsomewhat dolomitic;dolomitic; "floating""floating" quartzquartz grainsgrains scatteredscattered throughoutthroughout thethe easterneastern area.area .••*.. • • • •« • •»«••••.*.. • • • • • • 0 0 • * 0 3939

4.km CoveredCovered interval:interval: samplessamples ofof red,red, fine­fine­ grainedgrained quartziticquartzitic sandstonesandstone andand yellowish,yellowish, limlimyy siltstonesiltstone werewere dugdug outout ofof thisthis inter­inter­ valval whicwhichh formsforms a saddlesaddle throughoutthroughout thethe easterneastern area.area* • • • • • • . • • • • • a 0 ... 3535

5.5. Conglomerate:Conglomerate: fragmentsfragments generallygenerally variousvarious shadesshades ofof blacblackk andand gray;gray; dolomitedolomite frag­frag­ mentsments iinn a dolomitedolomite matrix;matrix; somesome redred quartziticquartzitic cobblescobbles scatteredscattered throughout;throughout; fragmentsfragments sub-roundedsub-rounded toto roundedrounded inin shapeshape andand poorlpoorlyy sortedsorted asas toto size;size; widewide rangerange ofof sizesize ofof rocrockk constituentsconstituents bubutt muchmuch ofof ththee volumevolume ofof ththee unitunit isis mademade upup ofof frag-frag­ mentsments exceedingexceeding 6 inchesinches across ,0 •..... • • • o.. 329329 6.6. Conglomerate:Conglomerate: likelike thethe above;above; inin thethe lowerlower half,half, fragmentsfragments 6 inchesinches oror largerlarger accountaccount forfor moremore thanthan halfhalf ofof thethe volume;volume; iinn thethe upperupper half,half, thethe constituentsconstituents areare generallygenerally smallersmaller bubutt increaseincrease inin sizesize

fromfrom 2-52-5 inchesinches •••••••••• Q •. •* •. •. 6666

7. Conglomerate:Conglomerate: 1 inchinch fragmentsfragments commoncommon atat ththee basbasee increasingincreasing inin sizesize upwardsupwards wherewhere fragmentsfragments 3 inchesinches oror greatergreater accountaccount forfor

halhalff ofof ththee volumevolume exposed ...... 0 c0 • • ...... 8989

8.8. Conglomerate:Conglomerate: sizesize increasesincreases upwardsupwards generallygenerally andand 12-1812-18 inchinch boulderboulderss areare com-com­ monmon inin uppeupperr half.half. •...... • • • • • ~ • • • • •. 0 6767

9. Conglomerate:Conglomerate: sandy,sandy, rust-coloredrust-colored matrix,matrix, becominbecomingg lessless sandysandy andand grayergrayer inin colorcolor towartowardd ththee top;top; 3-inch3-inch cobblescobbles areare commOncommon andand accountaccount forfor nearlynearly halhalff ofof thethe volumevolume

of this Interval...... 0 • • • • . • • .. • 0 . . 30 of this interval. • • • a .. . 30 10.10. Quartzite:Quartzite: whitewhite toto tan,tan, weathersweathers rusty­rusty- tantan;; mediummedium grained;grained; formsforms a resistantresistant ledge;ledge; pittedpitted weatherinweatheringg surfacesurface wherewhere calcitecalcite cementcement occursoccurs inin appreciableappreciable FigoFigo 7a7a PhotoPhoto showingshowing thethe greatgreat rangrangee ofof partiparticlclee sizesize inin thethe conglomerateconglomerate ofof thethe StansburyStansbury forformationmationoo

FigoFigo 7b7b RandomRandom viewview ofof conglomerateconglomerate outcropoutcrop inin thethe

StansburyStansbury formationoformation0 NoteNote hammerhammer forfor sizeosize 0 2929

StansburyStansbury FormatioFormationn (Cont,)(Cont.) ThicknessThickness inin feetfeet

quantities;quantities; beddinbeddingg generallygenerally 3™3~4^ feetfeet thickthick throughout .... • 0 •».•••.• • 0 ••••• c• 0 o .. .. 119119

11.11. Conglomerate:Conglomerate: tantan matrixmatrix witwithh veryvery finefine sandsand grainsgrains nearnear ththee basebase;; unitunit becomesbecomes mormoree rustyrusty towartowardd thethe totopp asas ththee quartzquartz contentcontent increasesincreases upwardsupwards andand gradesgrades intointo ththee quartzite;quartzite; aboutabout halhalff ofof thisthis uniunitt byby volumvolumee isis madmadee uupp ofof fragmentfragmentss 3-63-6 inchesinches acrossacross ••••• 0 0 0 G ••• 0 • 0 0 • 0 o •o 1919 12. Quartzite:Quartzite: whitewhite ttoo lightlight tantan,, weathersweathers tantan toto rustyrusty;; hard,hard, resistant;resistant; containscontains specksspecks ofof ironiron (?)(?) mineralmineral throughout.throughout. 0.. .. . 0 11

13. Conglomerate:Conglomerate: quartziticquartzitic matrixmatrix withwith thethe quartzquartz contentcontent increasingincreasing upwardsupwards;; mostmost fragmentsfragments lessless thanthan 3 inchesinches inin size .••• ... • . 0 5

14.l*f. Conglomerate:Conglomerate: predominantlpredominantlyy graygray matrix;matrix; a veryvery widewide sizesize rangerange inin thisthis interval,interval; ththee lowelowerr thirdthird isis lessless resistantresistant andand oc­oc­ curscurs inin somewhatsomewhat scatteredscattered outcropoutcropo. 0.... 0 • o . 0 408*+08

15.15. Conglomerate:Conglomerate: largerlarger fragmentfragment sizessizes pre­pre­ dominantdominant withwith manymany greatergreater thanthan 1 footfoot across .•••••••••••••• . • • 0 000 5959

16.16. Quartzite:Quartzite: lightlight brownbrown,, weathersweathers rusty;rusty; resistant;resistant; medium-grained.medium-grained. 0• »•••••• • • 0 • • 0 • • 0 33

17.17. Conglomerate:Conglomerate: brownbrown matrix;matrix; smallersmaller sizedsized fragmentsfragments predominanpredominantt inin thisthis inter-inter­ valval;; maximummaximum sizesize aboutabout 2 inchesoinches. 0• •«•« • 0 • 0 . 0 42h2

18.18. Sandstone:Sandstone: rusty,rusty, weathersweathers thethe same;same; somewhatsomewhat coarse~grained;coarse-grained; dolomitedolomite frag=frag­ mentsments scatteredscattered throughoutthroughout thisthis unitunit becominbecomingg moremore numerounumerouss towardtoward thethe toptop andand gradinggrading intointo thethe conglomerate .... . 0. 0. 0. . 0 • •. 49*f9

19.19• Dolomite:Dolomite: darkdark gray,gray, weathersweathers lightlight graygray toto tantan witwithh a grittygritty surface;surface; sandy,sandy, coarselycoarsely crystalline;crystalline; thinthin bedded;bedded; containscontains

0 • 0 0 0 • 0 calcareouscalcareous cement ,••••••. * . 0 . « . „ * <> 0 „ . . 66

20.20. Sandstone:Sandstone: lightlight tantan,, weathersweathers rusty,rusty; calcareouscalcareous cement;cement; medium-bedded;medium-bedded; medium­medium- grained;grained; basabasall 3 feetfeet ofof thithiss unitunit isis aa quartzitequartzite ••••••••••• 0 0 0 • 0 0 0 45V5 Fig.Figo 8a8a PhotoPhoto showingshowing thethe markedmarked similaritysimilarity inin characteristicscharacteristics betweenbetween thethe conslomerateconglomerate ofof thethe StansburyStansbury formationformation (foreground)(foreground) andand thethe ProvoProvo shorelineshoreline depositsdeposits (upper(upper right)right) 0•

FigFigo. 88bb RandoRandomm vievieww ooff conglomeratconglomeratee outcrooutcropp iinn thethe

StansburStansburyy formationformationo0 NotNotee hammehammerr foforr sizeosize0 3300

StansburStansburyy FormatioFormationn (Conte~Conto)) ThicknessThickness iinn feetfeet

2121.. SandstoneSandstone:: gray-tangray-tan,, weatherweatherss lighlightt tantan;; fine-grainedfine-grained;; calcareous,calcareous., .0 .••• • . •o «• .0 3535

2222.. SandstoneSandstone:: lighlightt tantan,, weatherweatherss rusty;rusty; medium-beddedmedium-bedded;; somewhasomewhatt coarse-grainedcoarse-grained l anandd friablefriable;; leslesss resistantresistanto. .0 . 0 . 0 .0 .• .000 . . vG46

23. DolomiteDolomite:: graygray,, weatherweatherss lighlightt gray;gray; coarselcoarselyy crystallinecrystalline; ; grittygritty,, pittedpitted weatherinweatheringg surfacesurface;; formformss a resistantresistant ledge...... ledge •••••••.••••••. *•*...... 0 • 0 • • . 0 9

2h.24. DolomiteDolomite:: blackblack,, weatherweatherss dardarkk gray;gray; finelfinelyy crystallinecrysta~line;; poorlpoorlyy definedefinedd bed­bed­ dingding,, bubutt mediumediumm ttoo thin-beddethin-beddedd neanearr thethe toptop;; manmanyy reredd silsiltt partingpartingss iinn ththee upperupper halhalff ooff thithiss unitunit;; abundanabundantt gastropgastropoodd outlineoutliness bubutt nonnonee werweree founfoundd preservedpreserved welwelll enougenoughh toto permipermitt identification. ••00. • • . 0 47^7

25. DolomiteDolomite:: blackblack,, weatherweatherss mottlemottledd graygray anandd dardarkk graygray;; finelfinelyy crystalline;crystalline; massivmassivee ...... 0 0 o 0 3535

2626.. DolomiteDolomite:: blackblack,, weatherweatherss graygray andand lilighgh tt graygr ay;; finelyfinely crystallinecrystalline;; mediumediumm ttoo thick-thick-

beddedbedded;; formsforms a resistanresistantt ledge .••• ..... 0 0 . 3030

2727.. ConConglomerateglomerate:: dolomitedolomite pebblepebbless raranginngingg fromfrom graygray ttoo blacblackk inin colorcolor enclosedenclosed inIn a dodolomitlomitee matrix;matrix; a fewfew ofof thethe pebblespebbles exceedexceed 1 inchinch iinn sizesize bubutt thethe majoritymajority areare fromfrom 1/4-1/21/^—1/2 Incheinchess aacroscrosss andand sub­sub- roundedrounded inin shape;shape; thisthis unitunit ggraderadess upwardsupwards intointo dolomite .••••• ...... 0 ••••• 0 0 0 0 . 0 5

28.28. Dolomite:: g~aygra\f,, weathersweathers lilighghtt gray;gray; finelyfinely crcrystallineystalline;; thin-beddedthin-bedded through~through­ out;out; a fewfew veryy ssmalmalll dolomitedolomite pebblespebbles occuroccur alongalong thethe beddingbedding nearnear tthhee toptop ofof thisthis unitunit...... ••.• ••••...•...... 0ooo. 0 0 0 o 0 252-5

29. Coveredd interval:interval: likelyy thin-bedded~thin-bedded, siltysilty dolomite .•••..•• ...... •••• 0 • .00. 3737 30.30. Dolomite:Dolomite: gray,gray, weathersweathers lilighghtt gray;gray; finelyfinely crcrystallineys t alline;; very thin-bedthin-beddingding ,, generagenerallllyy lessless thanthan 1 inch;inch; rustyrusty siltslit papartingrtingss areare evideevidenntt onlyonly whenwhen thethe rockrock

isis split ...... 0 t) 0 0 •••0 0 0• ., Q 0 0 o 0 2 Fig 0G 9 ViewView showingshowing size,size, shape,shape, andand degreedegree ofof sortingsorting ofof thethe ProvoProvo shorelineshoreline depositsdeposits westwest ofof thethe quarryquarry atat Flux,Flux, Utah&Utah. 3131

StansburyStansbury FormationFormation (Conto)(Cont.) ThiThicknescknesss inin feetfeet

31.31« Conglomerate:Conglomerate: dolomitedolomite pebblepebbless rangingranging inin colorcolor fromfrom lightlight graygray toto blackblack;; thethe pebblepebbless rangerange inin sizesize fromfrom 1/321/32 toto 22 inchesinches withwith ththee majoritmajorityy greatergreater thanthan 1/21/2 inch;inch; dolomitedolomite matrix,matrix, pebblespebbles sub-angularsub-angular toto sub~roundedsub-rounded inin shape;shape; pittepittedd weatheringweathering

surface• ••••••• •..••.••••••oaao.. ••••••••• 0 • . • 22

32.32, CoveredCovered interval:interval: likelylikely interbeddedinterbedded silts or sands, and dolomites~ • 0 0 • • • 0 silts or sands, and dolomites...... 36 Total Stansbury formation 1741 Total Stansbury formation 17^1 The Mississippian System The Mississippian System The Mississippian System in the northern Stansbury Range The Mississippian System in the northern Stansbury Range is represented by a thick sequence of marine limestone with is represented by a thick sequence of marine limestone with associated sandstone and minor dolomite. The complete sec­ associated sandstone and minor dolomite. The complete sec­ tion is exposed in the eastern area west of the quarry at tion is exposed in the eastern area west of the quarry at Flux, Utah, in Sections 5 & 6, T. 2S., R. 6W. The formations Flux, Utah, in Sections 5 & 6, T. 2S., R. 6W. The formations recognized here have been tentatively correlated with the recognized here have been tentatively correlated with the Oquirrh Mountains section (Gilluly, 1932) and, therefore, Oquirrh Mountains section (Gilluly, 1932) and, therefore, include the Madison-Deseret limestone, the Humbug formation, include the Madison-Deseret limestone, the Humbug formation, and the Great Blue limestone. A Mississippian dolomite se­ and the Great Blue limestone. A Mississippian dolomite se­ quence is also present here, underlying the Madison-Deseret quence is also present here, underlying the Madison-Deseret limestone. This basal unit is tentatively correlated with limestone. This basal unit is tentatively correlated with - the basal Missi~sippian dolomite in the central Wasatch Moun- the basal Mississippian dolomite in the central Wasatch Moun­ tains, and Gilluly1s so-called Jefferson (?) dolomite of the tains, and Gilluly1s so-called Jefferson (?) dolomite of the Oquirrh Mountains on the basis of coral studies by Helen Oquirrh Mountains on the basis of coral studies by Helen Duncan, U.S.G.S., who has reported a Carboniferous fauna in Duncan, U.S.G.S., who has reported a Carboniferous fauna in these formations. (Guidebook No.8, Utah Geological and these formations. (Guidebook No. 8, Utah Geological and 3322

MineralogicaMineralogicall SurveySurvey,, 19520)1952•)

A ververyy unusuaunusuall featurfeaturee ooff thithiss sectiosectionn iiss ththee presencepresence ooff aann erosionaerosionall unconformitunconformityy withiwithinn ththee lowelowerr MississippianMississippian stratastrata.. ThThee basabasall MississippiaMississippiann dolomitdolomitee underlieunderliess knownknown

MadisoMadisonn stratstrataa witwithh nnoo angulaangularr discordancdiscordancee bubutt ththee contactcontact betweebetweenn ththee twtwoo iiss markemarkedd bbyy a smal s malll scalscalee karskarstt topographyotopography.

ThiThiss contaccontactt iiss similasimilarr Iinn naturnaturee anandd positiopositionn witwithh thethe erosionaerosionall unconformitunconformityy presenpresentt betweebetweenn ththee MadisoMadisonn limestonelimestone anandd ththee JeffersoJeffersonn (?(?)) dolomitdolomitee iinn ththee OquirrOquirrhh MountainsMountains.. ItIt iiss notablnotablee thathatt ththee basabasall dolomitedolomitess alsalsoo contaicontainn aann earlyearly

MississippiaMississippiann fauna.fauna. ThiThiss featurfeaturee iiss presenpresentt iinn botbothh thethe

FluFluxx anandd TimpiTimpiee areaareass wherwheree thertheree araree googoodd outcropoutcropss ooff bothboth ththee MadisoMadisonn limestonelimestone andand ththee underlyinunderlyingg dolomitdolomitee unitounit.

ThThee Mississippian-DevoniaMississippian-Devoniann contactcontact iinn ththee TimpiTimpiee Breaarea isis tentativeltentativelyy placeplacedd aatt ththee basbasee ofof ththee lowermoslowermostt dolomitedolomite bedbed inin ththee basabasall MississippiaMississippiann containingcontaining aann abundanceabundance ooff fossilfossil material.material. ThisThis bedbed hashas abundantabundant SyringoporaSyringopora spspo. andand manymany fragmentsfragments ofof crinoidcrinoid columnalscolumnals whichwhich areare 1/21/2 inchinch inin dia­dia­ meter.meter. TheseThese werewere examinedexamined bbyy W¥.o 10L. StokesStokes whowho stated:stated:

"The"The abundanceabundance andand sizesize ofof thesethese crinoidscrinoids wouldwould suggestsuggest a MississippianMississippian ratherrather thanthan a DevonianDevonian ageage forfor thisthis unit."unit."

InIn thethe FluxFlux area,area, thethe basalbasal MMississippiaississippiann stratastrata restrest onon thethe erodederoded surfacesurface ofof thethe quartzitequartzite atat thethe toptop ofof thethe Stans-Stans­ burybury formation.formation.

UnnamedUnnamed MississippianMississippian FormationFormation

TheThe basalbasal MississippianMississippian dolodolomitmi tee foundfound inin thethe northernnorthern 3333

StansburyStansbury rangerange isis inin thethe mainmain finelyfinely crystallinecrystalline witwithh somesome

dolomitedolomite Ilsands""sands" presentpresent nearnear thethe toptop ofof thethe unitounite FossilsFossils

areare fairlyfairly commoncommon inin thethe sequence.sequence0 ManyMany crinoidcrinoid fragmentsfragments andand

Syrin€?oporaSyringopora sp.sp* werewere observedobserved andand cupcup coralscorals areare especiallyespecially

abundant.abundant. A collectioncollection ofof thethe latterlatter fromfrom ththee westerwesternn areaarea waswas sentsent toto HelenHelen DuncanDuncan,, U.S„G.S«,U.S.G.So ,7 whowho reportedreported thethe following~following

"One"One fairlyfairly completecomplete hornhorn coral,coral, thoughthough severelyseverely re-crystallizedre-crystallized,, dididd yieldyield twotwo sectionssections thatthat showshow a carcinoPAylldcarcinophylld axialaxial structureostructure. I amam unableunable toto 1denttfyidentify thethe genus,genus, butbut coralscorals ofof thisthis generalgeneral'' "· ' groupgroup areare nonott knownknown beforbeforee MississippianMississippian timestimes..ooo. ththee largerlarger specimensspecimens (of(of thethe unnumberedunnumbered slabs)slabs) areare carcinophylldcarcinophylld coralscorals similarsimilar toto thethe formform inin lotlot C-2.C-2. TheThe smallsmall specimensspecimens areare "zaphrentoids""zaphrentoids" withwith strongstrong columnellas.columnellas. TheThe materialmaterial isis tootoo poorlypoorly preservedpreserved forfor identificationidentification ofof genera,genera, Qutbut thethe af­af­ finitiesfinities ofof thesethese coralscorals areare distinctlydistinctly Carboni-Carboni­ ferous.ferous. WeWe getget smallsmall "zaphrentoids""zaphrentoids" withwith columnellascolumnellas inin thethe MadisonMadison bubutt I havhavee notnot studiedstudied thethemm sufficientlysufficiently toto knowknow whetherwhether theythey cancan bebe placedplaced inin describeddescribed generaoGooingenera....in anyany event,event, neitherneither carcinophylldscarcinophyllds oror columnellatecolumnellate zaphrentoidszaphrentoids areare knownknown toto occuroccur inin thethe Devonian,Devonian, soso I thinkthink itit isis - safesafe toto saysay youyou gotgot thesethese fromfrom thethe lowerlower Missis-Missis­ sippiansippian dolomite."dolomite."

WalteWalterr SadlickSadlick identifiedidentified a CompositaComposita cfocf. humilishumilis andand oneone

Brachytb,yrisBrachythyris sp.sp. collectedcollected inin thethe lowerlower partpart ofof ththee sequencesequence andand a collectioncollection ofof gastropodsgastropods fromfrom thethe samesame intervalinterval waswas sentsent

toto EllisEllis LL.. YochelsonYochelson,, UoSoGoS.,UoS.GoS*, whwhoo kindlkindlyy suppliedsupplied thethe fol­fol­ lowinglowing report:report:

"The"The threthreee gastropodsgastropods inin collectiocollectionn C areare poorlypoorly preservepreservedd euomphalidsoeuomphalids• OneOne specimenspecimen maymay - tenta~tenta­ tiveltivelyy bbee referrereferredd toto StraparollusStraparollus (Euomphalus)(Suomphalus) utahensiutahensiss HallHall andand WhitfieldoWhitfield. ThisThis speciesspecies isis re­re­ portedported fromfrom thethe MadisoMadisonn ofof UtahUtaho. OnOn ththee otherother handhand,, DevonianDevonian gastropodsgastropods ofof UtahUtah areare poorlypoorly knownknown andand thisthis specimenspecimen mighmightt representrepresent a newnew species."species."

InIn subsequentsubsequent fieldfield work,work, thisthis samesame stratigraphicstratigraphic inter­inter­ vavall wawass measuredmeasured inin thethe easterneastern areaarea andand anotheranother coralcoral 3*

collectioncollection waswas madmadee andand sentsent toto LoLe LLoc Sloss,Sloss, NorthwesterNorthwesternn Uni­Uni versity,versity, whowho reported:reported.

"So"So farfar asas I cancan tell,tell, thethe formsforms ddoo notnot approachapproach anyany thatthat I havehave seenseen fromfrom ththee UpperUpper DevonianDevonian and,and, indeed,indeed, seemseem ttoo havhavee a moremore thanthan passinpassingg resem­resem­ blanceblance ttoo typetypess fromfrom thethe LowerLower MississippianMississippiano. TheThe mostmost easilyeasily recognizedrecognized formsforms areare a speciesspecies ofof TriplophyllitesTriplophyllites whichwhich isis widelywidely representedrepresented inin thethe Madison.Madison."" '

ItIt isis thusthus evidentevident thatthat earlyearly MississippianMississippian timetime isis rep­rep­ resenteresentedd herheree bbyy a dolomitedolomite sequencesequence notnot reportereportedd inin thethe nearbynearby areasareas toto thethe northnorth andand east.east. ThereThere isis a possibilitypossibility thathatt thisthis sequencesequence maymay bbee allall oror inin partpart correlativecorrelative witwithh thethe

GardnerGardner formationformation oror Fitchvil~eFitchville formationformation ofof ththee TinticTintic district.district.

Th~The followingfollowing sectionssections i~lustrateillustrate thethe detailsdetails ofof tthihiss stratigraphicstratigraphic intervalinterval atat thethe FluxFlux andand TimpieTimpie areasareas resrespecpec-­ tively:tively:

UnnamedUnnamed MississippianMississippian ForFormationmation,, Flux ArAreeaa ThicknesThicknesss inin feetfeet

1.1. Dolomite;Dolomite: steel-gray,steel-gray, weatherweatherss inin graygray andand darkdark graygray streaks;streaks; finefine ,grainedgrained dolomitedolomite . sand;sand; mediummedium toto thinthin bedded;bedded; fewfew poorlypoorly pre-pre­ servedserved cupcup coralscorals atat thethe top .•• ...... 0 • 0 • 0 0 . 0 88

2.2. DolomiteDolomite:: gray,gray, weatherweatherss lightlight gray;gray; mediu~medium crystallinecrystalline texture;texture; veryy irregularirregular bedding;bedding; roundedrounded weatheringweathering •••••••..• 0 •• 0 2020

3. Dolomite:Dolomite: likelike Noo. 101. •«..•. . 0 •...... 0 •• 0 • . • •. 77

k9 Dolomite:Dolomite: blacblackk andand darkdark gragrayy,~ weathersweathers same;same; finelyfinely granulagranularr ; ; poorlpoorlyy bedded,bedded, massive...... massive ••••••••. 0 • 0 0 . • ••••..... o . 0 2727

5 m Dolomite:Dolomite: black,black, weatweatherherss darkdark gray;gray; veryvery finefine sugarysugary texturetexture;; thickthick beddedbedded ttoo maSFmas­ sive;sive; veryvery fossiliferousfossiliferous witwithh abundantabundant cupcup coralscorals andand SyringoporaSyringopora sposp. •...... 0 0 0 0 •••. . o. 0. 7575 3535

UnnameUnnc~lmedd Mississ1'p~ianMississippian Formation,Formation, FluxFlux AreAreaa (Cont.)(Cont.) ThicknessThickness inin feetfeet

6.6. DolomiteDolomite andand cnert:chert: blacblackk andand gray,gray, finelyfinely crystallinecrystalline dolomitedolomite bedsbeds 1-61-6 inchesinches thick,thick, interbeddedInterbedded withwith black,black, tabulatabularr chertchert 1-31-3 inchesinches thickthick whicwh~chh weatherweatherss rustyrusty;; fossili-fossili- . ferousferous ••••••••...... Q •••••. 0.so.. 0 0 0 • . 0 H^i

7.7. Dolomite:Dolomite: ' darkdark gray,gray, weatherweatherss gray;gray; veryvery finelyfinely crystalline;crystalline; thinthin beddebeddedd toto flaggyflaggy witwithh thithinn redred siltsilt partingspartings;; abundantabundant cri-cri­ . noidnoid fragmentsfragments throughoutthroughout.. •. •. • •••••• 0 77

8~8. ":Dolo'mite:Dolomite: " likelike No.7No. 7 hubutt thisthis uniunitt isis lessless res~stantresistant andand isis pa~ti~~lypartially coveredcovered •••••• 3232

TotaTotall UnnameUnnamedd MississippianMississippian formation,formation, FluxFlux AreAreaa 220220

Unnamed Mississippian Formation, Timpie Area Thickness Unpamedi , . ., MiSSissippian i ' Formation, Timpie Area Thickness inin feetfeet

1.1. Dolomite:Dolomite: gray-white;gray-white; sugarysugary texture;texture: mas­mas­ sive,sive, resistant;resistant; numerounumerouss cavitycavity filllngsfillings ofof wnitewhite crystallinecrystalline calcitecalcite throughout;throughout; pittedpitted Weatheringweathering surface. ••••••••• . • • 1515 2 .• . . DolomiDolomite te:: . dardarkk gray,gray, weathersweathers lightlight gray;gray; whitewhite dolomitedolomite stringersstringers throughout .•••• .... • . • 22 3.3» Dolomite:Dolomite: bandedbanded graygray andand whitewhite,, granular,granular, dolomite;dolomite; bandinbandingg aboutabout 1 inchinch thickthick generally.generally. •. • • • • • • • • • • • • • • • • 0 22

4.if. Dolomitel;).olomi te:: blackblack,, weatherweatherss darkdark gray;gray; fine­fine­ lyly granulagranu~arr texture;texture; alternatingalternating lightlight graygray bandbandss aboutabout 6 inchesinches thickthick.. •...... • • • • 0 • • . • 66

5.5» DolomiteDolomite:: blackblack,, weathersweathers gray;gray; finelyfinely cry­cry­ $talline;stalline; tabulartabular chertchert nodulesnodules commocommonn inin the.the upperupper part;part; chertchert isis 1 toto 4k inchesinches thickthick andand weathersweathers rusty;rusty; veryvery fossiliferous;fossiliferous; . abundantabundant cupcup corals.corals. •...... • • • • •. • • • • • •• 191191

6.6. Dolomite;Dolomite: likelike NoNo.. 5 bubutt weatherweatherss a light-light­ erer gray.gray. •..... • • • • . • • • • • • • • •..... • • • • . • 1313

7.7* DolomiteDolomite andand chert:chert: lightlight gray,gray, finelyfinely crystallinecrystalline dolomitedolomite andand interbeddedInterbedded tabu­tabu­ ~arlar cherche~t whichwhich weathersweathers rustyrusty;; gradesgrades 36

UnnamedUnnamed MississippianMississippian Formatio~TimpieFormation, Timpie AreaArea (Cont.~onto)) ThicThicknesknesss in feet in feet

downward into thin-bedded, limy dolomite •• 0 35

downward into thin-bedded, limy dolomite0 . . 35 8. Covered interval: probably thin-bedded 8. Covered interval: probably thin-bedded limy dolomite or limestone ••• 0 0 • 0 0 • 0 limy dolomite or limestone, * . „ » . « . . . h7 9. Dolomite:Dolomite: black,black, weathersweathers darkdark graygray toto blackblack;; finelyfinely crystalline;crystalline; mediummedium bedded;bedded; fairlyfairly fo~siliferousfossiliferous witwithh SyringoporaSyrineopora sposp* andand manymany fragmentsfragments ofof largelarge crinoidcrinoid colum­colum- nals about 1/2 inch in diameter 0 0 0 0 • nals about 1/2 inch in diameter.e o c o e o .o *.. 6 TotalTotal UnnamedUnnamed MississippianMississippian formation,formation, TimpieTimpie AreAreaa 317317

UnnamedJ MississippianMississippian Formation-MadisonFormation-Madison LimestoneLimestone ContactContact

TheThe erosionerosion surfacesurface atat thethe toptop ofof thethe basabasall MississippianMississippian

dolomitedolomite sequencesequence isis bestbest exposedexposed inin thethe TimpieTimpie area.area* (See(See

Figs.Figs. ::L10.Qea , & .:L,ob).10b). TheThe contactcontact ofof thethe MadMadiso isonn limestonelimestone withwith

thethe basalbasal unitunit isis remarkablyremarkably clear-cutclear-cut withwith ththee darkdark graygray

limestonelimestone veryvery muchmuch inin contrastcontrast withwith thethe gray-whitegray-white dolomite.dolomite.

TheThe limestonelimestone isis commonlycommonly muchmuch moremore fossiliferousfossiliferous thathann thethe

dolomitedolomite nearnear thethe contact.contact. TheThe dolomitedolomite showshowss numerounumerouss smallsmall

,cavitycavity fillingsfillings ofof whitewhite crystallinecrystalline calcite.calcite.

TheThe ir.regularirregular solutionsolution cavitiescavities intointo whicwhichh ththee limestonelimestone

waswas depositeddeposited varyvary greatlygreatly inin dimensiondimension bothboth lateralllaterallyy andand

vertically.vertically. TheThe greatestgreatest depthdepth observedobserved waswas k4 feetfeet andand thethe

widthwidthss variedvaried fromfrom a fewfew inchesinches toto severalseveral feet.feet.

TheThe Madison-DeseretMadison-Deseret LimestoneLimestone i

InIn thethe StansburyStansbury area,area, therethere isis nnoo stratigraphicstratigraphic breakbreak

andand nono goodgood · fossilfossil evidenceevidence Whichwhich cancan bebe usedused toto separateseparate thethe FigoFigo lOa10a SectionalSectional viewview ofof karstkarst contactcontact betweenbetween thethe Madison-DeseretMadison-Deseret LimestoneLimestone (Cmd)(Cmd) andand ththee basalbasal MississippianMississippian dolomitedolomite (Cu)o(Cu)„ NoteNote hammehammerr forfor scaleoscaleG

FigoFigo lOb10b PlanPlan viewview ofof karstkarst contactcontact betweebetweenn thethe Madison~DeseretMadison-Deseret limestonelimestone (Crnd)(Cmd) andand thethe basalbasal

MississippianMississippian dolomitedolomite (Cu)o(Cu)0 LightLight areasareas areare dolomite,dolomite, darkdark areaarea isis limestonelimestoneo0 3737

DeseretDeseret ~imestonelimestone fromfrom thethe MadisonMadison limestone©o ConsequeConsequentlyntly,,

thethe stratigraphicstratigraphic intervalinterval betweenbetween thethe basalbasal MMississippiaississippiann

dolomitedolomite andand thethe lowermostlowermost sandstonesandstone ofof thethe HumbugHumbug formationformation

isis hereinherein designqteddesignated asas thethe Madison-DeseretMadison-Deseret limestonelimestoneo.

T~isThis unitunit isis well~exposedwell-exposed inin bothboth thethe easterneastern andand west-west­ ~

ernern areasareas andand isis composedcomposed ofof a sequencesequence ofof mediummedium toto thinthin

bedded,bedded, graY,gray, fossiliferousfossiliferous limestonelimestone bedsbeds withwith a transittransitioi onn

zonezone ofof siltstonessiltstones atat thethe topotop0 NodularNodular chertchert isis commoncommon inin

thethe upperupper partpart andand siltsilt partingspartings areare frequentlyfrequently foundfound

throughoutthroughout thisthis interval.interval.

ItIt seemsseems worthyworthy ofof notenote thatthat thisthis sectionsection isis aboutabout one­one- halfhalf timestimes g~eat~rgreater inin thicknessthickness inin thethe TiropieTimpie areaarea thanthan inin

thethe FluxFlux areaarea asas isis thethe basalbasal dolomitedolomite uniunitt underlyingunderlying itoit.

ThisThis woulwouldd seemseem toto suggestsuggest a locallocal deepeningdeepening ofof thethe geosyn­geosyn-

clinecline toto thethe westwest,, or,or, conversely,conversely, a locallocal highighh toto thethe eastoeast.

A brachiopodbrachiopod collection,collection, mademade inin thisthis intervalinterval inin thethe westernwestern areaarea,, wawass examineexaminedd bbyy WalteWalterr SadlickSadlick whwhoo furnishefurnishedd the%h followinfollowingg report~report:

"Antiguitonia"Antiquitonia spsp.. - foundfound iinn ththee MississippiaMississippiann andand highehigherr PaleozoiPaleozoicc rocks.rocks.

LinoproductuLinoproductuss gallatinensigallatinensiss - typicatypicall ooff ththee Madi­Madi­ sosonn limestone.limestone*

SpirifeSpi~iferr "centronatus"centronatus"" grougroupp - characteristicharacteristicc ooff thethe MadisoMadisonn limestonelimestonef; notenotedd bbyy ththee presencepresence ooff 17-2117-21 costacostaee onon ththee lateralaterall slopes."slopes*"

A gastropogastropodd collectiocollectionn frofromm thithiss samsamee areareaa wawass sensentt toto

ElliElliss LL.. YochelsonYQchelson,, U.SoGoSoU.S.GoSo,, whwhoo reportereportedd thth~e following:following: 3838

"The"The bestbest preservedpreserved specimenspecimen ofof ththee lotlot isis iden­iden­ tifiedtified asas StraStraparollu arolluss (EuomphalusEuom halus ) luxusluxus (White)o(White). AnotherAnother StraparollusStraparollus (EuomphalusEuom halus ) isis tootoo poorlypoorly- preservedpreserved forfor specificspecific identificationoidentification. TheThe re­re­ mainingmaining fourfour specimensspecimens areare referablereferable ttoo thethe genusgenus LoLoxonema....eve4 onema •••• evenn thougthoughh mostmost ofof thethe gastropodsgastropods areare poorlypoorly preservedpreserved,, theythey areare typicaltypical MadisonMadison forms.forms. I amam quitequite suresure thatthat youryour identificationidentification ofof thethe formationformation isis correct."correct."

OtherOther fossilsfossils recognizedrecognized bbyy thethe authorauthor inin thisthis formationformation are:are:

TriplophyllitesTriplophvllites sp.sp. SyringoporaSyringopora sp.sp. CompositaComposita humilishumilis ?? StraparollusStraparollus ophirensisophirensis ?? ProetusProetus peroccidensperoccidens FenestellateFenestellate bryoz6abryozoa

TheThe authorauthor waswas unawarunawaree thatthat Wm.Wm. L.L. StokesStokes hadhad previouslypreviously measuredmeasured a totaltotal ofof 997.5997.5 feetfeet forfor ththee combinedcombined thicknessesthicknesses ofof thethe UnnameUnnamedd MississippianMississippian formationformation andand thethe Madison­Madison-

DeseretDeseret limestonelimestone inin thethe FluxFlux area.area. TheThe writer'swriterfs totatotall ofof

838838 feetfeet forfor thesethese samesame units,units, althoughalthough less,less, agreesagrees fairlyfairly closelyclosely withwith thethe measuremenmeasurementt mademade bbyy Dr.Dr. Stokes.Stokes.

TheThe detail~details ofof thithiss stratigraphicstratigraphic intervalinterval areare presentedpresented inin thethe followingfollowing sectionssections measuredmeasured inin thethe FluxFlux andand TimpieTimpie areas,areas, respectively:respectively:

Madison-DeseretMadison-Deseret Limestone,Limestone, FluxFlux AreaArea ThicknessThickness inin feetfeet

1.1. Siltstone:Siltstone: purple?purple, weathersweathers purplpurplee toto brick-red;brick-red; a fewfew llmy,limy, veryvery fine-grainedfine-grained sandstonessandstones present;present; thesethese weatherweather graygray toto rusty;rusty; fragmentsfragments ofof purplepurple shaleshale evidentevident also;also; a non-resistannon-resistantt saddle-former;saddle-former; flaggyflaggy beddingbedding ••••.•..••• 0<,... 0 • • . 0 100100

2.2. Limestone:Limestone: darkdark gray,gray, weathersweathers gray;gray; fine­fine­ lyly crystallinecrystalline throughout;throughout; thin-bedded;thin-bedded; 3939

Madison-DesereMadison-Deserett Limestone,Limestone, FluxFlux AreaArea (Cont(Cont.o ) ThiThicknescknesss inin feetfeet

abundantabundant tabulartabular chertchert 1-31-3 inchesinches thickthick whichwhich weatherweatherss blackblack andand rusty;rusty; poorlypoorly preservedpreserved brachiopobrachiopodd outlinesoutlines andand colonialcolonial

corals;corals; fewfew cupcup coralsocorals0 •. 0• 0• 0. ••••„ . „ <> 0 „ 0 • 0 5353

3* Limestone:Limestone: fossiliferous,fossiliferous, fragmental;fragmental; re­re- crystallizedcrystallized calcitecalcite fragmentsfragments ofof crinoidcrinoid columnalscolumnals setset inin a finefine crystallinecrystalline matrix;matrix; mediummedium ttoo thin-beddethin-beddedd witwithh a fewfew almostalmost fissile,fissile, siltysilty limestonelimestone layerslayers interbedded;interbedded; abundanabundantt nodularnodular andand tabulartabular blacblackk chertchert whicwhichh weathersweathers rustyrusty.. •. •« • •. „~ • • • . • •» • 616l

4.km Limestone:Limestone: lightlight gray,gray* weathersweathers thethe same;same; mediumediumm crystallinecrystalline texture;texture; crinoidcrinoid frag-frag­

mentsments <;indand cupcup coralscorals abundant.abundant. •. 0. • 0„ 0 0 . • . • 1010

5.5. LimestoneLimestone:: darkdark graygray toto blackblack,, weathersweathers ththee same;same; a fewfew interbeddedinterbedded partingpartingss ofof lightlight graygray sandysandy limestone;limestone; smallsmall cupcup coralscorals andand SYringoporaSyringopora sposp. plentiful;plentiful; cri­cri­ noinoidd fragments;fragments; texturetexture finelyfinely crystalline. •• . 151?

6.6* Limestone:Limestone: ververyy mucmuchh likelike NoNo.. 5 bubutt no­no­ ticeablyticeably lessless fossiliferous;fossiliferous; StraparollusStraparollus SPasp. andand TriplophyllitesTriplophvllites SPasp. ••...... 0 •• 0 • • . • 4k

77~. Limestone:Limestone: interbeddeinterbeddedd finelyfinely crystallinecrystalline limestonelime~toness andand darkdark graygray~, sandysandy limestoneslimestones withwith fossilsfossils andand fossilfossil fragments,fragments; thethe latterlatter alsoalso containscontains reredd siltsilt partings;partings; abundantabundant StraparollusStraparollus spo,sp., TriplophyllitesTriplophvllites sp.,sp., andand SyringoporaSyringopora spo;sp.; weathersweathers intointo greatgreat quantitiesquantities ofof talUS.talus«.. 0 • . 0 „ . • 0• •. 0. 143IV3

8.8. Limestone:Limestone: veryvery muchmuch likelike No.No. 7 butbut isis noticeablynoticeably darkerdarker graygray inin colorcolor.. 0. 0. 0. . 0 •. 0. 3030

9.9. Limestone:Limestone: tan,tan, weatherweatherss lightlight gray;gray; veryvery finelyfinely crystalline;crystalline; blacblackk fragmentsfragments enclosedenclosed givgivee a salt-and-peppersalt-and-pepper texturetexture - toto thisthis;; thin-beddethin-beddedd butbut resistant.resistant. •. •. 0. . 0 . 0 0« 66

10.10, Limestone:Limestone: darkdark graygray toto black~black, weathersweathers lighter;lighter; ververyy finelyfinely crystallinecrystalline withwith in­in­ terbeddeterbeddedd layerslayers ofof fossilfossil fragments;fragments; yellow-orangeyellow-orange,, limylimy siltsilt presenpresentt inin layerslayers generallygenerally lessless thathann 1 inchinch thickthick.. 0. •. 0. •. ••. . 7878 40

Madison-DesereNadison-Deserett LimestoneLimestone,. FluFluxx AreAreaa (Cont,(ContoL) Thicl{nessThickness iinn feetfeet

1111.. LimestoneLimestone:: liklikee NoNo.. 1100 bubutt thithiss uniunitt isis leslesss resistanresistantt anandd occuroccurss iinn somewhatsomewhat scatterescatteredd outcropoutcrop.. •0 •...... «. • • .. & 0 • • .. 0 0 o . • 118118

TotaTotall Madison-DesereMadison-Deserett limestonelimestone measuremeasuredd iinn ththee FluFluxx areareaa 6186l8

Madison-DesereNadison-Deserett LimestoneLimestone~? TimpiTim12i~e AreAreaa ThicknessThickness iinn feetfeet

11.. LimestoneLimestone:: blackblack,, weatherweatherss blue-gray;blue-gray; veryvery chertycherty witwithh nodulenoduless uupp ttoo 5 feefeett inin lengthlength alonalongg ththee beddinbeddingg planeplane;; chertchert blackblack,, weatherweatherss dardarkk brownbrown;; limestonelimestone medium-beddedmedium-bedded;; fossiliferousfossiliferous witwithh brachio-brachio- podpod outlineoutliness anandd abundanabundantt cupcup coralscorals.. •... • ••. 228228

22.. LimestoneLimestone:: blackblack,, finelyfinely crystalline;crystalline; somewhasomewhatt mormoree blockblockyy anandd resistanresistantt thanthan NoNo.. 1 anandd noticeablnoticeablyy lesles'ss cherty;cherty; Strap~-Strapa­ rollurolluss sp .•••••••••• . . 0 • • .. • • • • 6363

3.3. Limestone:Limestone: black,black, weathersweathers gray;gray; thin­thin- beddedbedded saddle-former;saddle-former; occursoccurs inin scatteredscattered outcrop.outcrop • • • • • • • • • • • . .. • • • • • 44M+ 4. Limestone:Limestone: finelyfinely crystalline;crystalline; mediumediumm toto thin-bedded;thin-bedded; containscontains a fewfew scatteredscattered chertchert nodulesnodules;; fossiliferous;fossiliferous; StraparollusStraparollus sp.,sp., LoxonemaLoxonema sp.,sp., andand abundantabundant smallsmall cupcup corals;corals; blockblockyy beddingbedding.. ~...... 0 • C ••. 5656

5.5» Limestone:Limestone: black,black, weathersweathers gray;gray; finelyfinely crystalline;crystalline; containscontains red,red, limylim5r siltsilt part­part­ ingsings throughout;throughout; thin-beddedthin-bedded saddle-former;saddle-former;

occursoccurs inin scatteredscattered outcrop.outcrop. •...... 0 0 • 0 • . • 7373

6.6. Limestone:Limestone: likelike No.No. 5 butbut isis generallygenerally medium-bedded;medium-bedded; formsforms a resistantresistant ledge.ledge. eo.... 47kj

7. Limestone:Limestone: thin-beddedthin-bedded toto flaggy;flaggy; saddle­saddle- former;former; abundantabundant smallsmall cupcup corals.corals. 0...... o . 0 40^0

8.8. Limestone:Limestone: mediummedium toto thin-bedded;thin-bedded; finelyfinely crystalline;crystalline; interbeddedInterbedded withwith flaggy,flaggy, sandysandy limestonelimestone layers;layers; containscontains somesome nodu­nodu­ larlar chert;chert; StraparollusStraparollus sp.sp. andand plentifulplentiful smallsmall cupcup corals ...... 9 • 0 • & 0 ••• 0 .... 1431V3 41hi

}Madison-Desere1adison-Deserett Limestone,Limestone? TimpieTimpie AreaArea (Cont.)(Cont,) ThThicknesi cknesss inin feetfeet

9.9» CoveredCovered interval:interval; probablyprobably thin-bedded~thin-bedded, sandy limestone •• e 0 0 • 0 0 0 0 • 0 • • • 85 sandy limestone* * • 0 c • , • » . « o , 0 • 85

10.10, Limestone:Limestones blackblack,, weathersweathers graygray;; finefine crystalline;crystalline; mediummedium toto thin-bedded;thin-bedded; oc-oc­

curscurs inin scatteredscattered outcrop., 0• ••. , .0 . • ceO' , • ,0 8030

11.11, Limestone:Limestones blackblack,, weathersweathers graY9gray, mediummedium ttoo thin-beddedthin-bedded;; flaggyflaggy inin a fewfew places;places; finelyfinely crystalline;crystalline; containscontains a fewfew red. siltsilt partings;partings; a resistantresistant ledge-former;ledge-former; fewfew largelarge cupcup coralscorals ••••••••••«••» 0 0 0 • 0 0 • 0 e 0 * 0 o.* , 105105

12.12, Limestone:Limestone: black,black, weathersweathers gray;gray; medium­medium- beddedbedded,, formsforms a resistantresistant ledge;ledge; containscontains thinthin beqsbeds ofof softer,softer, sandysandy limestonelimestone andand tabulartabular chertchert beds ,••••••• ••••*»«*•«•* 0 • Q 0 • •« • 2222 TotalTotal Madison-DeperetMadison-Deseret limestonelimestone measuredmeasured inin thethe TimpiTimpiee areaarea 986986

TheThe HumbugHumbug FormationFormation

ThThee HumbugHumbug formationformation alonealone accountsaccounts forfor nearlynearly one-halfone-half thethe combinedcombined thicknessesthicknesses ofof ththee MississippiaMississippiann formationsformations pre­pre­ sentsent inin thethe northernnorthern StansburyStansbury RangeRange., ThisThis formationformation isis representedrepresented bbyy a sequencesequence ofof interbeddedinterbedded limestoneslimestones andand sandsand™~ stonesstones containingcontaining manymany bedsbeds ofof gradationalgradational lithology.lithology. ItIt isis a~ fairlyfairly resistantresistant unitunit andand thethe steeply=dippingsteeply-dipping ledgesledges formform high~igh,, resistantresistant hills.hills.

VerVeryy fewfew fossilsfossils werewere foundfound inin thisthis uniunitt soso thethe toptop ofof thisthis formationformation isis tentativeltentativelyy placeplacedd wherewhere thethe lithologylithology changeschanges fromfrom interbeddedinterbedded limestoneslimestones andand sandstonessandstones toto thethe pre­pre­ dominantdominant limestonlimestonee lithologlithologyy ofof thethe GreatGreat BlueBlue formation.formation.

TheThe followingfollowing sectionsection wavJaSs measuredmeasured weswestt ofof thethe Flux quar­quar- ryy andand thethe author'sauthorfs totaltotal ofof 15091509 feetfeet agreesagrees closelyclosely withwith thethe 42k2

15381538 feetfeet ofof stratigraphicstratigraphic sectionsection measuredmeasured inin ththee samesame loca­loca­ tiontion earlierearlier byby WmWmo. LoL. Stokes:Stokes:

TheThe HumbuHumbugg FormationFormation ThicknessThickness inin feetfeet

1.1. QuartziteQuartzite andand quartziticquartzitic sandstone:sandstone: tatann toto buffbuff,, weatherweatherss rusty;rusty; fine-grained,fine-grained, mediummedium bedded;bedded; containscontains somesome calcitecalcite cement;cement; be­be­ comescomes moremore calcareouscalcareous downwardsdownwards andand ththee lowerlower thirthirdd ofof thisthis unitunit isis a partiallpartiallyy limylimy sandstone ,...... • •••.«. . 0 ...... • « » <» » • <» • . 0« 5959

2.2. Limestone:Limestone: lightlight graygray toto tantan,, weathersweathers aa deepdeep rustrust color;color; veryvery sandy;sandy; irregularirregular bed-bed­ ding,ding, thithinn toto flaggyoflaggy, • • • " . . • • • . ••, 40^0

3* Limestone:Limestone: blackblack,, weathersweathers darkdark gray;gray; blockblockyy bedding ,...... " .. 0 •• 0 o • . • 2222

1 +, Limestone:Limestone: likelike No.2No, ...... 0 l*f 4. " 0 " . . .. 14

5« Limestone:Limestone: likelike NoNo.3, 3 *...... • 0 " " •. ". ••# •... •. 66 6.6, CoveredCovered interval:interval: a fewfew scatteredscattered outcropsoutcrops ofof sandysandy limestone..limestone, •...... • • " • .. . • • . . 0 • • 3232

7.7, Sandstone:Sandstone: tan-graytan-gray color,color, weathersweathers rusty;rusty; veryvery fine-grained;fine-grained5 quartzitic;quartzitic; containscontains somesome calcitecalcite cement;cement; thin-bedded,thin-bedded, irregularirregular totO blOCkyblocky., •..... • eo" . • 0.....o..e«o • • .. • 0 " • • 0 ••, 1212

8.8, CoveredCovered interval:interval: sandysandy limestonelimestone float, ••. 0, 40kO

9, Limestone:Limestone: black,black, weatherweatherss darkdark gray;gray; coarsecoarse crystalline;crystalline; thin-beddedthin-bedded witwithh rust­rust- coloredcolored siltsilt partingpartingss throughout, •• ..... 0 •• .. .. 99

10.10. CoveredCovered interval:interval: probablyprobably non-resistantnon-resistant sandysandy oror siltysilty limestones ,...... " " • .. 5353

11.11. LimestoneLimestone:: darkdark gray,gray, weathersweathers ththee same;same; sandy,sandy, coarsecoarse crystalline;crystalline; thin-bedded,thin-bedded, somewhatsomewhat blocky;blocky; containscontains thinthin siltsilt part-part­ ingsings throughout...... 0 .. " • 0 ...... • 2626

12.12. LimestoneLimestone:: darkdark gray,gray, weathersweathers rustrustyy toto purplish;purplish; fossiliferousfossiliferous fragmental;fragmental; thin-thin-

beddedbedded,, sandy ,...... ,»«•••«•««««. 0 ••• " • 0 .... 0 .. . .. 77

/ ^3

TheThe HumbugHumbug FormatioFormationn (Cont.(Cont~) Thicl;:nessThickness inin feetfeet

13.13. CoveredCovered interval:interval: probablyprobably a calcareouscalcareous sandstonesandstone oror sandysandy limestonelimestone transitiontransition fromfrom thethe limestonelimestone aboveabove toto thethe underly-underly- ingmg quartzitequartzite ...... oeo.ooo.so.o OOOOO_i,lo.ooo ..o «.. 3333 lLs-. Quartzite:Quartzite: tan,tan, weathersweathers rusty;rusty; finefine grained;grained; hard,hard, compact;compact; beddinbeddingg blocky...... « ... 66

15.1?. CoveredCovered interval:interval: somesome fine,9 limylimy sand-sand- stonestone floatiloat ...... j)OO(llOOOOflOO. o 00 00 000 .. 0 .. 87Q7

o 16.16. Quartzite:Quartzite: likelike Noc 14.1^. •. ..* •. •. •. . . . • • 4 17.17• Sandstone:Sandstone: lightlight gray,gray, weathersweathers lightlight graygray toto tan;tan; "salt"salt andand pepper"pepper" texture;texture; mediummedium toto coarsecoarse grained;grained; thin-bedded* ... 0 •. •. 2828

18.18. Quartzite:Quartzite: tantan toto lightlight brown;brown; weathersweathers brown;brown; fine-grained;fine-grained; hardhard,, compact;compact; con-con­ tainstains somesome calcitecalcite cementcement ...... , . •. •. 8181 19.19. Sandstone:Sandstone: lightlight gray,gray, weatherweatherss lightlight brownbrown toto rusty;rusty; medium-grained;medium-grained; somewhatsomewhat limy .••• . . 129129

20.20. Limestone:Limestone: darkdark gray,gray, weatherweatherss gray;gray; thethe toptop isis sandysandy gradinggrading upwardsupwards intointo sand­sand­ stone;stone; generallygenerally finelyfinely crystalline...... 2121

21.21. Limestone:Limestone: graygray toto blackblack,, weatherweatherss graygray toto deepdeep rust;rust; finelyfinely crystallinecrystalline butbut con­con­ tainstains a highhigh percentagepercentage ofof ververyy finefine quartzquartz particleparticless throughout;throughout; thin-beddedthin-bedded toto flaggy.flaggy. 0. l6l

22.22. LimestoneLimestone andand chert:cherts black,black, finelfinelyy cry­cry­ stallinestalline limestonelimestone whichwhich weathersweathers darkdark graygray interbeddedinterbedded withwith blacblackk tabulartabular chertchert whicwhichh weathersweathers rusty;rusty; irregularirregular bedding;bedding; . thin,thin, 1-31-3 inchesinches thickthick~...... 0 ...... 122122 23.23. Sandstone:Sandstone: graygray ttoo tan,tan, weathersweathers tantan toto rusty;rusty; fine-grained;fine-grained; liny,limy, somewhatsomewhat fri­fri­ able,able, glauconitic;glauconitic; poorlypoorly bedded ...... u • • . • 3333 24.2*+. QuartziteQuartzite andand quartziticquartzitic sandstoDo:sandstones lightlight browbrOlmn andand tan,tan, 11160.weather tlJerss brouncrown t.oto :eusrusty ty;; slightlyslightly limv;limy; medium-beddedmediuD-~edded., Llockv:blocky; r1au­glau­ conitic;conitic; ththe"e basalbasal fourthfourth of'thi~of'this uniu~it'in­t In­ creasedcreased downwarddownward inin liDOline contentcontent gradinggrading intointo thin-bedded,thin-bedded, less-resistant?less-resistant, linylimy sandsand andand sandysandy Ilne~line...... '. . . . . ". . 168168 44

TheThe HumbugHumbug FormationFormation (Conto)(Cont0) Th:-c~messThickness inin feetfeet

25.25*. Limestone:Limestone: black,black, weathersweathers gray;gray; finefine crystalline;crystalline; veryvery cherty;cherty; chertchert bedsbeds 1-61-6 inchesinches thickthick connoncommon throughoutthroughout thisthis unitunit andand manymany smallsmall chertchert nodulesnodules areare present;present; chertchert black,black, weathersweathers rusty;rusty; abundantabundant crinoidcrinoid fragments.fragments. 0. 0• •. ~. •. G• •••• • , 0• . 0 • „ 0 48**8

26.26. Chert:Chert: solidsolid bedbed ofof blackblack chertchert whichwhich weathersweathers rusty.rusty* • «.*....•«.'-.«•0 0 0 • • • • • 0 • o 0 0« • 4k

2". LimestoneLimestone andand chert:chert: blackblack limestonelimestone whicwhichh weathersweathers gray,gray, interbeddedinterbedded withwith blacblackk tabu13rtabular chertchert w~ichwhich weathersweathers rusty;rusty; limestonelimestone bedsbeds 2-52-5 inchesinches thick.thick, tabulartabular cbertchert bedsbeds aboutabout 1 inchinch thickothick* :.000.0 • 0 0 • • * • 8989

28.28. Sandstones:Sandstones: graygray andand tan,tan, weathersweathers graygray toto rusty;rusty; calcareous;calcareous; cross-beddingcross-bedding wellwell developeddeveloped inin thisthis unit;unit; thin-bedded;thin-bedded; in­in­ terbeddedterbedded fine-grainedfine-grained compactcompact sandstonessandstones witbwith medium-grained,medium-grained, friablefriable sandstones;sandstones; a fewfew thin,thin, sandysandy limestonelimestone bedsbeds included..included. . 102102

29.29. Sandstone:Sandstone: gray,gray, tantan andand drabdrab greengreen color,color, weathersweathers somewhatsomewhat rusty;rusty; fine­fine­ grained,grained, limy;limy; thin-bedded;thin-bedded; bardhard andand com-com­ pact,pact, almostalmost quartziticquartzitic inin spots.spots. •...... • ••. 7373

TotalTotal HumbugHumbug formationformation 15091509

GreatGreat BlueBlue LimestoneLimestone

ThisThis formationformation isis mademade upup ofof a thickthick sequencsequencee ofof graygray andand blue-gray,blue-gray, mediummedium toto tbin-beddedthin-bedded limestonelimestone whicwhichh isis gen­gen­ erallyerally lessless resistantresistant thanthan thethe limestonelimestone ofof thtbee underlyingunderlying

HumbugHumbug formation.formation.

SomeSome ofof thethe limestonelimestone bedsbeds areare quarl'iedquarried atat Flux,Flux, Utah~Utah, --- forfor commercialcommercial useuse byby thethe UtahUtah LimeLime andand StoneStone CompanyCompany~, SaltSalt

LakeLake City,City, Utah.Utah • >f455

MaximMaxim KK.. Elias,Elias, NebraskaNebraska GeologicalGeological Survey,Survey, hahass madnc.;..uee anan extensiveextensive fossilfossil collectioncollection fromfrom ththee FluxFlux quarriesquarries andand isis pre­pre paringparing a manuscriptmanuscript onon hishis findings.findings. HHee hahass veryvery graciouslygraciously allowedallowed hishis fossilfossil identificationsidentifications toto bbee includedincluded inin thisthis the-the sis;sis; portionsportions ofof hihiss letterletter ttoo ththee writewriterr follow:follows

"My"My identificationsidentifications ofof thethe faunafauna fromfrom thethe quarriesquarries atat Flux,Flux, UtahUtah,, andand 1tlhichwhich I listlist belmv?below, datedate ttoo 194519^5 andand areare toto bbee reviserevisedd iinn ththee lightlight ofof mymy ownown currentcurrent revisiorevisionn ofof BritisBritishh CarboniferousCarboniferous bryozoansbryozoans (some(some FluxFlux bryozoansbryozoans beingbeing nearestnearest toto them)them) onon ththee actualactual BritishBritish bryozoanbryozoan materialmaterialss loan?dloaned toto meme fromfrom Glas­Glas­ gow,gow, Scotland;Scotland; andand ththee paperspapers subsequentsubsequent toto 19~·519^5 onon coralcoralss (by(by ParksParks anandd others)others) andand ZelleZellerr andand othersothers onon forams.forams. MyMy wholewhole manuscriptmanuscript onon FluxFlux exposuresexposures andand itsits faunafauna isis toto bbee somewhatsomewhat revisedrevised soso asas toto absorbabsorb somesome specimensspecimens fromfrom minminee andand Sadlick1sSadlick's jointjoint neneww collectioncollection fromfrom ththee samesame quarry.quarry. TheThe titletitle ofof thethe manuscripmanuscriptt iiss 'Big'Big BlueBlue MississippianMississippian and. itsits FaunaFauna atat FluxFlux,, Utah'.Utah1.

Foraminifera:Foraminiferas 1.!• EndothyraEndothyra cf.cf. bowmanibowmani BradyBrady 2.2. OrbiasOrbias macellamacella BradyBrady 3.3* OrbiasOrbias sp.sp. (n.(n. sp.?)sp.?) 4.k* cf.cf. OrbiasOrbias struviistruvii (Moeller)(Moeller)

Corals:Coralss 5.5. Caninophyllum?Caninophyllum ? n.n. sp.,sp., cf.cf. CaniniaCaninia cylindricacylindrica Sconl.Sconl. 6.6. AuloporAuloporaa nn.. sp.sp.

BryozoanBryozoans:s s 7.!• HederellaHederella sp.sp. 8.8. FenestrellinaFenestrellina cf.cf. quadradecimalisquadradecimalis McCoyMcCoy 9.9. FenestellaFenestella albidaalbida HallHall 10.10. FenestellFenestellaa plebeiaplebeia McCoyMcCoy,, n.n. var.~var.. withwith Palaeocoryne-likePalaeocoryne-like "appendages"appendages "I . 11.11. FenestellaFenestella nn.. sp.sp. 12.12. FenestellFenestellaa cf.cf. fenestratumfenestratum YounYoungg andand YoungYoung,, withwith PaleocorynePaleocoryne appendagesappendages 13.13. FenestellFenestellaa tenatenaxx UlrichUlrich 14. PolyporaPolypora nn.. sp.,sp., cf.cf. spinodataspinodata UlrichUlrich 15. PolyporaPolypora cf.cf. striatastriata CumingsCumings ^ 16.16. HemitrypaHemitrypa nodosnodosaa Ulrich,Ulrich, n.n. var.var. -- 17.17 • RhomboporaRhombopora sp.sp. 18.18. Sulcoretepora,Sulcoretepora. n.n. sp.sp. 46k6

Brachiopods:Brachiopods s 19.19* LinoproductusLinoproductus sposp. 20.20• PugnoidesPugnoides parvulparvulaa GirtyGirty 21.21. SpiriferSpirifer centronatuscentronatus WinchellWinchell 22.22. ComoositaComposita sposp.

Pelecypods:Pelecypods: 23.23. NuculNucNuculau a n.n• sp.sp 24.ft. LeptodesmaLeptodesma nno. sposp

Echinoderms:Echinoderms: 25.25. ArchaeocydariArchaeocydariss sp.sp. 26. Crinoidal columnals" 26. Crinoidal columnals" The fossil collection made by the writer in this unit io= The fossil collection made by the writer in this unit in­ cluded: cluded : SpiriferSpirifer cf.cf. S.8. washingtoneosiswashingtonensis LithostrotiQnellaLithostrotionella sp.sp. "Organ-pipe""Organ-pipe" coralscorals LargeLarge cupcup coralscorals FenestellateFenestellate bryozoabryozoa

GreatGreat BluBluee LimestoneLimestone ThicknessThickness inin feetfeet

1.1. LimestoneLimestone:: blackblack,, weatherweatherss darkdark gray;gray; finelyfinely crystalline;crystalline; thick-bedded,thick-bedded, blockyblocky.. . . 1717

2.2. Limestone:Limestone: lightlight gray,gray, weatherweatherss lightlight graygray ttoo rustyrusty;; dense,dense, irregular,irregular, wavywavy beddingbedding •••••••••••••••• . . • • 1111 3. CoveredCovered interval:interval: thethe lowerlower parpartt ofof thisthis intervalinterval containscontains scatteredscattered outcropsoutcrops ofof darkdark gray,gray, cherty,cherty, crumblycrumbly limestone.limestone. 0... • • . 0 2727

4. LimestoneLimestone:: blackblack,, weathersweathers lightlight gray;gray; • finelyfinely crystalline;crystalline; thick-bedded,thick-bedded, blocky;blocky; generallygenerally resistant. •••••..•...... • 0 89

5.5. CoveredCovered interval:Interval: probablprobablyy siltysilty limestonelimestone... . 3636

6.6. Limestone:Limestone: darkdark gray,gray, weathersweathers graygray toto rusty;rusty; silty;silty; finelyfinely crystalline;crystalline; veryvery cherty;cherty; lenseslenses ofof tabulartabular chertchert through­through­ outout fromfrom I1 inchinch toto 1 footfoot thick;thick; chertchert blackblack,, weathersweathers rusty;rusty; thin-beddedthin-bedded toto

flaggy;flaggy; manymany bryozoabryozoa present.present. 0...... 0 0 0 •• 000. 69 S. LAKESIDE MTNS. (Young), 1-----15 miles------1 1------'.:.." 10 miles------j 1----- 55 miles----~ ~PE!:!N!!N:.::S~Y-=LIl::r.::;N~IA::;N:..._--- l' =----= ?__

~ Manning Ccnyoo ______formatian ______2 3

STANSBURY ISLAND N. STANSBURY RANGE (Hughes,pers.camm.) ______(this report)

Great Blue l' Maming Ccnyoo limestone shale

INDEXINDEX MAPMA P

Humbug formation

Gardner dolomite Pinyon Peak Is. 5000·loet yicioria qtzt. 5000 feet Bluebell dolomite Eagle dolomite 40040000 Opohonga Is. 30003000 Ajax limestone Opex dolomite 20002000

UPPER CAMBRIAN Lynch (i') dolo. 1000 AND 1000 POSSIBLE ORDOVICIAN o CORRELATIONCORRELATION OFOF PALEOZOICPALEOZOIC ROCKSROCKS ININ NORTHCENTRALNORTHCENTRAL UTAHUTAH

Fig.Fig. 1111 >+7

GreatGreat BlueBlue LimestoneLimestone (Conjb.J(Cont~, Thi\.;h:nos3Thickness inIn feetfeet

7. Limestone:Limestones gray,gray, weathersweathers blue-gray;blue-gray; somei-lhatsomewhat silty;silty; finelyfinely crystallinecrystallinc;,; 8uchmuch lessless chertycherty thanthan EooNo. 66~; plentifuplentifull lI"organorgan­- pipe"pipe" andand largelarge cupcup corals ;7 medium-beddedned:i.um-bedded .0 o. eo. 3493^9

8.8. Limestone:Limestones blackblack,, weathersweathers gray;gray; finelyfinely crystalline,crystalline, somewhatsomewhat silty;silty; containscontains abundantabundant fragmentalfragmental fossilfossil materialmaterial throughout;throughout; mediummedium ttoo thin-beddedothin-bedded. 0. 0. "» a• .D 0. 110110

9. Siltstone:Siltstones darkdark gray,gray, weathersweathers rusty;rustys thin-beddedthin-bedded toto flaggy,flaggy; irregularirregular beddingbedding1;

• 0 • • • 0 e • 0 ~ & 0 Q G u limy. •• . •" . •. •* •• ..-*•••. ,«..•,«. " . 0 cL.626

10.10. LimestoneLimestone:s blackblack,, weathersweathers gray,gray; silty;silty; thin,thin, irregularirregular bedding;bedding; finelyfinely crystal-crystal-

line.line ..••o*e*oooi}9oesc>ece ., ...... 0 0 Q 0 • Ii) 0 !$ " ij) () " . eo 1313

11.11. Limestone:Limestone: black,black, weathersweathers gray;gray; finelyfinely crystalline;crystalline; blockblock bedbedss 1-31-3 feetfeet thick,thick; 9393 feetfeet aboveabove thethe basbasee isis a 2-foot2-foot bedbed ofof

thithinn sandysandy limestonelimestone whicwhichh weathersweathers rusty"rusty, ". 0. 126126

12.12. Limestone:Limestone: darkdark gray,gray, weathersweathers gray;gray; somewhatsomewhat sandy;sandy; thin-beddedthin-bedded;; I-foot1-foot bedsbeds ofof limylimy sandstonesandstone areare foundfound aboutabout 7 feetfeet

andand 1919 feetfeet aboveabove thethe base .•• . &„ ". ". e0 , 0 . 0 ,o .0 2828

interval~ 13• CoveredCovered interval? sandysandy limestonelimestone floatfloato, . 0 5555 14.lk* Limestone:Limestone: blackblack,, weathersweathers gray;gray; finelyfinely crystalline;crystalline; blockblockyy bedbedss 1-21-2 feetfeet thick,thick; thethe lowerlower halfhalf ofof thisthis unitunit becomesbecomes pro­pro­ gressivelygressively sandiersandier downwards;downwards; 3 feetfeet aboveabove ththee basbasee ofof thisthis unitunit isis a 3-foot3-foot bebedd ofof very fine-grained, limy sandstone...... 77 very fine-grained, limy sandstone" " eo 0 c " & " 77

15* CoveredCovered interval:interval: probablprobablyy non-resistantnon-resistant limylimy sandstonesandstone whicwhichh gradesgrades intointo thethe moremore resistantresistant sandssands ofof thethe underlyingunderlying HumbugHumbug

formationformation ••..... " " ••. " 0 0 0 " ...... " " • " • " " . eo 1010

TotalTotal GreatGreat BlueBlue formationformation 10)?(10 55J

MississippiaNississippiann (?)(?) - PennsyPennsylvania1 vaniann Bep<.§Beds

TheThe :r.ranningManning CanyonCanyon shaleshale isis coverer]covered 01"or faultedfaulted outout eV(H'Y-every- 1------3355 milesmiles ------l f------4400 milemiless -----1 3 \ *4 3 N., STANSBURYSTANSBURY RANGERANG E (this report I (this report) 4 UTAH H ~PENNSYLVANIAP:::EN~N~S:..Y:...:L.:::.VA=N~I:..:AN:...:...,-N ___ ? ~ _ . OQUIRROQUIRRHH MTNSMTNS.. . ==-=~ Manning Canyon (Gillul(Gillulyy anandd othersothers) I ~ snale~

?=:- ~,s . . Great Blue . - -: ManninManningg CanyonCanyon limestone ~ ~ shalshalee INDEIN DEXX "MAA PP MISSISS IPPIAN Humbug formation

5 WASATCWASATCHH RANGRANGEE SALSALTT LAKLAKEE CITYCITY (Granger)(Granger)

MorganMorgan formationformation GreatGreat BlueBlue C?l(P )limestone limeston e 150050000 feetfeet HumbugHumbug formatioformationn '40040000 DeseretDeseret limestonlimestonee

MadisonMadison limestonlimestonee IPinyon Peak limestone 30003000 Swan Peak (P) fm. (Granger) or Stansbury formation (this report) 2000 MaxfieldMaxfield limestonelimestone 2000

10100000

^ CORRELATIONCORRELATION OFOF PALEOZOICPALEOZOIC ROCKSROCKS ININ NORTHCENTRALNORTHCENTRAL UTAHUTAH o

Fig.Fig. 1212 . \ 48

\wher'Jheree inin thethe area.. The'The shaleshale ,wadass seenseen onlyonly inin oneone eexcavatioxcavationn inin thethe easterneastern areaarea southh ofof thethe bigbig qquarruarryy atat FluFluxx,, UtahUtah,, inIn

SectionSection 8,, T.. 2S2S.. , R.. 61t6Wl .. HHereere,, a sesequencquencee ofof varivari-colored- col ored ",, fisfissil silee shalesshales witvii thh a fevJfew bedbedss ofof lilimestonme stonee isIs eexposedxpos ed .0 AnAn estiestimatiomationn madmadee fromfrom thethe lastlast resistanresistantt lilimestonmestonee ofof tthhee GreGreaatt

B~ueBlue formationformation .toto a narrownarrow outcroppingg ofof limestonelimestone strastratiti­- graphicallygraphically ababovovee thethe shale,shale, woulwouldd indicindicatatee a thicknthicknesesss ofof aboutabout 600600 feetfeet ofof shale.. ThereThere isis aboutabout 50JO feetfeet ofof finelyfinely crcrystallineystalline,, Clarkdark ggrarayy limeslimestone toness witvJi thh abundantabundant interbeddedinterbedded blackblack andand melmelon-coloreon-coloredd chertchert aboveabove thethe shale.shale. ThisThis limestonelimestone hahass thethe samesame attitudeattitude asas thethe toptop ofof thethe GreatGreat BBluluee limestonelimestone soso faultingfaulting maymay nonott havehave affectedaffected thethe thicknessthickness ofof thisthis unitunit appreciably<:l.ppre. C~ably.A. A fQfossi'ssill collectioncollection fromfrom ththee toptop of thethe exposedexposed limestonelimestone yieldeyieldedd thethe follofollowinwingg forformsms::

Brachiopods:: CChonetehonet ess cf.cf. C. grgranulifeanuliferr Trilobites:Trilobites: Ameura cf. A. ~ajo~ (Shumard) Ameura cf. A. major (Shumard) The presence of these fossil forms in the limestone indi­ The presence of these fossil forms in the limestone indi­ cates a Pennsylvanian age for the exposed limestone but only cates a Pennsylvanian age for the exposed limestone but only detailed paleontologic evidence from the Shale would definite- detailed paleontologic evidence from the shale would definite­ ly determine its age as Mississippian or Pennsylvanian, or fix ly determine its age as Mississippian or Pennsylvanian, or fix the boundary between the two systems within the shale. the boundary between the two systems within the shale. GEOLOGIGEOLOGICC SECTIONSECTION ALONALONGG LINELINE A-A' A-A NORTHERN' NORTHER NSTANSBURY STANSBUR YRANGE RANG E

[Cgb~l GreatGreat BluBluee limestonelimestone [Ch@lil] HumbugHumbug formationformation ~|Cmd | Madison-DeseretMadison-Deseret IsIs.. |~ Cu | UnnamedUnnamed formation formation

~| Ds | StansburyStansbury formation formation lOfh~l FisFishh HaveHavenn dolomitedolomite

155055000 feelfeet

5000 5000 I I

45004500

A------~~~~~----~--~~-L------~~------~--~--~~--~------~~~-----L------~~A'

0~_==__==_==_~~10~0~0~=1000 ====~2:::;00~0:;;..2000 _____....:3_0E:0~0~======4000=_:;;.. 3000 4000 _ ____....:500;;;;;; 500 0 feelfeet

Fig.Fig. 1313

\ STRUCTURESTRUCTURE

FoldFoldss

TheThe PaleozoiPaleozoicc exposuresexposures inin thethe TiTimpimp iee areaarea areare parpartt ofof aa northnorth trendingtrending anticline.anticline. UppeUpperr CaCambriamb riann rocrockkss areare exposedexposed atat thethe corecore ofof thisthis fold.fold. A monoclinalmonoclinal structuree oror perhapsperhaps ththee easterneastern limblimb ofof anotheranother anticlineanticline occursoccurs inin thethe FluFluxx areaareao.

CambrianCambrian andand OrdoviciaOrdoviciann rockrockss areare exexposeposedd inin thethe corecore ofof thisthis foldfold andand areare faultedfaulted againstagainst thethe tightlyy foldedfolded HumbugHumbug ststratrataa

ttoo thethe westwest (Fig.(Fig. 13).13)• -r

FaultsFaults

TheThe north-soutnorth-southh trendingg faultfault onon ththee easterneastern limblimb ofof thethe anticlineanticline iinn thethe TimpieTimpie areaarea dipsdips aboutabout 6060 degreesdegrees toto thethe weswestt withwith thethe upthrowctpthrownn sideside ttoo thethe west.west. TheThe displacementdisplacement isis relativelrelativelyy minominorr andand involvesinvolves onlyonly uppeupperr CaCambriambr iann andand Ordovi-Ordovi­ ciancian strata.strata. ItIt isis consideredconsidered toto bbee a high-anglhigh-anglee reversereverse fault.fault.

A majormajor north-southnorth-south trendintrendingg faultfault isis presentpresent inin ththee FluxFlux areaarea whichwhich bringsbrings CambrianCambrian andand OrdovicianOrdovician rocksrocks intointo faultfault

contactcontact withwith stratastrata ofof thethe HumbugHumbug formationformation (Figo(Fig. 14).ih)m AnAn estimatedestimated 35003?00 feetfeet ofof stratastrata havehave beebeenn cutcut outout bbyy thisthis dis­dis­ placement.placement. TheThe faultfault planplanee wherewhere observedobserved dipsdips aboutabout 8535 ~ degreesdegrees eastwardeastward ggivinivingg a high-anglehigh-angle reversereverse displacmentodisplacment.

TransverseTransverse faultsfaults cutcut thethe maimainn foldfold inin ththee Flux areaarea inin numerounumerouss placeplacess asas shownshown onon thethe geologicgeologic mapmap (Fig.(Fig. 15)015).

TheThe faultingfaulting inin ththee northernorthernn Stansburyy RangeRange isIs clearclearllyy post-foldingg becausebecause thethe displacementsdisplacements cutcut thethe foldsofolds. TheThe

49k9 GEOLOGICGEOLOGIC SECTIONSECTION ALONALONGG LINELINE 8-8' B-B NORTHERN' NORTHERN STANSBURY STANSBURY RANGE RANG E

@b][Ch | HumbugHumbug formationformation [Q!J| Ds |Stansbury Stansbur yformation formatio n ~|Osp ]Swan Swa nPeak Pea kformation formatio n ~|-Cu Unnamed1 Unname formationd formatio n

~| Cu | UmamedUnnamed formation formation ~|Ofh-| FishFish HavenHaven dolomite dolomite • BBj GardenGarden City City limestone limeston e

5000 feet

·.- 4500

0~ __~~~~ __~~10~0~0======~2~0~0~0 ______~3~0 ~OO~======~4~0~00~ ______~5000feet

FigFig_. 1414 5500 laclackk ooff latlatee PaleozoicPaleozoic~, MesozoiMesozoicc anandd TertiarTertiaryy rockrockss iinn thisthis areareaa preventpreventss absolutabsolutee datindatingg ooff ththee faultinfaultingg anandd foldingofolding.

HoweverHowever,, structurastructurall studiestUdiess madmadee Iinn nearbnearbyy areaareass makmakee possiblepossible ththee inferrencinferrencee thathatt crustacrustall unresunrestt frofromm latlatee MesozoiNesozoicc ttoo earlvearl.'y TertiarTertiaryy timtimee iiss responsiblresponsiblee foforr mosmostt ooff ththee structurestructuress ooff thethe

StansburStansburyy Range.Range.

DevoniaDevoniann (?(?)) UpliftUplift

Pre-MississippianPre-Mississippian,, post-Ordoviciapost-Ordoviciann disturbancdisturbancee Iinn thethe northernorthernn StansburyStansbury RangRangee iiss indicateindicatedd bbyy ththee presencpresencee ooff thethe thicthickk wedgwedgee ooff dolomitdolomitee conglomeratconglomeratee iinn ththee PaleozoiPaleozoicc sec-sec­ tiontion.. A DevoniaDevoniann agagee iiss assigneassignedd ttoo ththee conglomeratconglomeratee oonn thethe basibasiss ooff fossilfossilss collectecollectedd iinn ththee stratastrata betweebetweenn iitt andand knownknown basabasall MississippiaNlssissippiann rocksrocks (p.(p. 2222 )).,. ThiThiss conglomerateconglomerate "l11ichwhich wedgewedgess outout toto thethe southsouth iiss 2-1/2-1/22 feetfeet thickthick onon thethe nortnorthh sideside ofof MinerMinerts1s CanyonCanyon andand hahass nono representationrepresentation onon ththee southsouth sideside ofof thithiss canyoncanyon.. BasaBasall MississippiaMississippiann stratastrata werweree tracetracedd acrossacross ththee canyocanyonn inin continuouscontinuous outcropoutcrop.. OOnn thethe southsouth sideside ofof thethe canyon,canyon, HississippianMississippian stratastrata overlieoverlie OrdovicianOrdovician rocksrocks iAiwit thh aa distinctdistinct angularangular discordancediscordance whereaswhereas onon thethe northnorth side,side, thethe

MississippianMississippian stratastrata overlieoverlie thethe conglomerateconglomerate andand thethe upp~rupper bedsbeds ofof thethe StansburyStansbury formationformation withoutwithout angularangular difference.difference. ThisThis evidenceevidence seemsseems toto pointpoint toto a pre-conglomeratepre-conglomerate upliftuplift southsouth ofof Miner1sMiner1s Canyon.Canyon.

Pre-MissisSippian,Pre-Mississippian, post-Ordovicianpost-Ordovician disturbancedisturbance isis alsoalso indicatedindicated inin thethe TimpieTimpie areaarea wherewhere basalbasal ~ississippianMississippian stratastrata overlieoverlie anan incompleteIncomplete GardenGarden CityCity sequencesequence withwith anan angularangular discordancediscordance ofof aboutabout 2020 degreesdegrees (Fig.(Fig. 5a)"5a). ------,------,-----

R7W R6W

~ Quaternary undifferentiated

,-! '~J ~: au Icmel Manning Canyon shale

+ ") ICgb I Great Blue limestone "1.. , i L:"I I; 1/ @] Humbug formation II' II I, I, II 1/ 1/ Cmd Madi son - Deseret limestone 1/ I I 1/ '{ au If I \ II ,~ Unnamed formation II II '1 I, II 1/ II Stansbury formation 1/ [Q!J II 1/ Osc Conglomerate 1/ II OsQ2 Upper, quartzite II II osql Lower' quartzite • Ch~,' 1/ II Osd Dolomite 11 __ - •',5:i Fish Haven dolomite Swan Pea k formati on

Garden City limestone

Unnamed formation .. Fault

,', Ch" au Probable fault

-' ...... Concealed fault . '/ / Strike and dip of beds / ~6060 Strike and dip of beds

'0 i/z ' o 1/2------.; IMIL ------~I\'; .- -, .,~. R7W RoW

GEOLOGIC MAP .. NORTHERN STANSBURY' RANGE ;, l-; ,~~t,i a:.i Ll1..KELAKE BONNEVILLBONNEVILLEE SHORELII'E3SHORELINES

The shorelines of the Bonneville, Prove, and Stansbury laklakee stagesstages ofof prehistoriprehistoricc LakeLake BODnovilleBonneville areare wel~elll devolopeddeveloped

Iinn thethe northernorthernn StansburyStansbury RangeRange (Fig* .. 16) *.. ~heThe elavatelevation sJ ofof thestheG6e shorelinesshorelines werweree studiedstudied inin detaildetail byby GilbertGilbert (1090)(1890) 0a nappednapped onon thethe easterneastern sideside ofof thethe StansburyStansbury RangeRange byby Thoma~~s

(19^-6).

InIn thethe coursecourse ofof thithiss presenpresentt studysstudy, anan aneroidaneroid baro-baro­ metemeterr surveysurvey ofof thesethese lakelake levelslevels waswas undertakeundertakenn i~8ediat01yimmediately

Hestwest ofof Flux,Flux, UtahUtah,, inin SectionsSections 5 aDdand 6,1 T ... 23.23,,~, ::::toR. 61'16w \.. Aj;.i, nearbynearby U.U. S.S. CoastCoast andand GeodeticGeodetic Surv2YSurvey benchmarbenchmarkk servGdserved 8Jas aa datumdatum forfor elevation.elevation.

TheThe BonnevilleBonneville levellevel waswas foundfound ttoo bbee atat 52675267 feetfeet (plus(plus oror minusminus 3 feet)feet) elevation,elevation, andand ththee ProvoProvo IGvellevel wa~ass d~t~rnjn­determin­ eded ttoo bbee atat ^-8748711 feetfeet (plus(plus oror minuminuss 3 feet)feet) elevationelevation ...

TheseThese figuresfigures differdiffer substantiallysubstantially fromfrom GilbertlsGilbert23 statewidestatewide average elevations of 5135 feet and 4800 feet, re3pectively~ average elevations of 5135 feet and -:-80Q feet, respectively9 forfor thesethese shorelines.shorelines. TheseThese differencesdifferences ofof e18vationelevation seemseem toto indicateindicate considerableconsiderable crustaCT'"~13tall noverF~r~tmovement :Lnin thth.,;e northernorthernn 3tan::-Stans­ burburyy RangeRange afterafter tt~ethe strandlinesstrandlines ',](1"'8were f'or:lformedl.ec1 .0 ThoThe d:lffGr"enc(~difference betweebe-'c\'Jeenn ththee BonnevilleBonneville andand P:;:0'i70Provo leilel:::levels wava;3s formdfound toto bbee 396396 feet (plus or minus 3 feet) which agrees quite closely with

Gilbert'sGilbert's figurefigure ofof 389389 feetfeet (plus(plus oror minus 3 feet).

ThThee datadata placeplacedd thethe StansburyStansbury lc'\;ellevel atat Ll-~'()OMfOO feetfeet eleva-eleva­ tiODtion closelyclosely agreeingagreeing wit~ithh GilbertCsGilbert5s 8t3te~idGstatewide averageaverage ofof

1J-500k^QO feet.feet.

TheThe abundanceabundance ofof interrn.ediateintermediate shorelinesshorelines lSis besbe~stt sherlinshown inin Fig.Fig. 17.17» FigoFigo 1616 ArealAreal viewview nearnear FluxFlux9, UtahUtah showingshowing thethe well-developedwell-developed shorelineshoreline featuresfeatures ofof thethe BonneBonne­ villeville (B)~(B), ProvoProvo (P),(P), andand StansburyStansbury (S)(S) levelslevels in this area o in this areac FigoFigo 1717 ArealAreal viewview ofof thethe subduedsubdued shorelineshoreline featuresfeatures ofof thethe BonnevilleBonneville (B)(B) andand ProvProvoo (P)(P) levelslevels immediate­immediate' llyy westwest ofof Grantsville,~ UtahUtaho. NoteNote thethe abundancabundancee ofof

"intermediate""intermediate" levelslevels inin thisthis areaareao0 ECONOMIECONOMICC GEOLOGYGEOLOGY

ThThee limestonelimestoness ooff ththee GreaGreatt BluBluee formatioformationn anandd ththee dolo­dolo­

mitemitess ooff ththee FisFishh HaveHavenn formatioformationn araree founfoundd ttoo hbee economicallyeconomically

usuablusuablee inin thithiss areaarea.. QuarryinQuarryingg operationoperationss foforr ththee fornerformer

araree carriecarriedd oonn a FluxFlux,, UtahUtah,, anandd foforr ththee lattelatterr aatt Dolomite,Dolomite,

UtahUtah.. TherTheree araree plantplantss foforr processinprocessingg ththee raraww materiamateriall atat

botbothh locationlocationss alsoalso.. ThesThesee plantplantss araree owneownedd anandd operateoperatedd byby

ththee UtaUtahh LimLimee anandd StoneStone CompanyCompany,, SaltSalt LakLakee CityCity,, UtahUtah

ThThee mosmostt spectaculaspectacularr ofof ththee quarriequarriess iiss ththee cliffcliff faceface

somesome 180180 feefeett highighh aatt FluxFlux,, UtahUtah.. ThThee GreaGreatt BluBluee bedbedss areare dippingdipping somesome 70-770-755 degreedegreess eastwareastwardd herheree anandd thethe broabroadd expan­expan­

ssee ooff thithiss nearlnearlyy verticaverticall didipp slopeslope presentpresentss a strikingstriking viewview

eveneven fromfrom thethe highwayhighway.. (See(See FigFig.. l8a).18a).

TheThe rockrock isis blasted,blasted, loadedloaded andand carriedcarried ttoo thethe crushercrusher wherewhere itit isis screenedscreened ttoo sizesize andand thethenn shippedshipped toto thethe variousvarious

usersusers.. SpurSpur lineslines ofof ththee \vesternWestern PacificPacific RailroadRailroad extendextend toto

bothboth localities.localities. OneOne additionaladditional operation,operation, thatthat ofof burningburning andand hydration,hydration, isis carriedcarried onon atat thethe Dolomite,Dolomite, Utah,Utah, planteplant.

TheThe threethree mainmain limestonelimestone productsproducts andand thethe screenscreen sizessizes throughthrough whichwhich theythey mustmust passpass are:are: (1)(1) "sugar"sugar rock",rock", 3 xx

4-1/21/2 inches;inches; (2)(2) "flux"flux oror foundryfoundry rock",rock", 1/21/2 x 1-1/21-1/2 inches,inches, andand "fines","fines", allall rockrock particlesparticles lessless thanthan 1/21/2 inch.inch. TheThe sugarsugar rockrock isis sentsent toto sugarsugar refineriesrefineries forfor processingprocessing pur­pur­

poses,poses, andand hence,hence, itsits name;name; somesome ofof thethe fluxflux rockrock isis shippedshipped toto metalmetal refineriesrefineries wherewhere itit isis usedused inin thethe phph controlcontrol ofof acidacid ores;ores; somesome maymay bebe furtherfurther treatedtreated byby burningburning andand hyora-hydra-

52 FigoPigo l8a18a VieVieww fromfrom highwayhighway ofof quarryquarry inin thethe

GreatGreat BlueBlue limestonelimestone atat Flux99 UtahUtahoo NoteNote

thethe near~verticalnear-vertical dipdip inin thethe stratastratao0

FigoFigo l8b18b MillMill atat Flux,~ UtahUtah wherewhere limestonelimestone isis crushed,; sized,, andand baggebaggedd forfor shipmenshipmentt o0 5533 tiotionn aatt DolomiteDolomite,, Utahutah,, anandd thethenn useusedd iinn ththee manufacturmanufacturee ofof refractorierefractoriess oorr ththee purificatiopurificationn ooff culinarculinaryy watewaterr suppliesesupplies,,

SomSomee ooff ththee finefiness araree useusedd bbyy smeltersmelterss foforr fluxinfluxingg purposespurposes oorr iinn ththee manufacturmanufacturee ooff cementcement". SomSomee iiss groungrocmdd ttoo "roc}:\."rock dustdust"" aatt FluxFlux,, UtahUtah.. ThThee fragmentfragmentss araree pulverizepulverizedd bbyy a Ray-Ray­ monmondd rollerollerr milmilll ssoo thathatt 7700 percenpercentt ooff ththee resultanresultantt prod~ctproduct wilwilll paspasss througthroughh a 200-mes200-meshh screescreenn ttoo meemeett governmengovernmentt specl-speci­ fications.fications. ThiThiss materiamateriall mamayy thethenn bbee useusedd asas aann additivadditivee inin bituminoubituminouss roaroadd toptop,, iinn ththee refininrefiningg anandd smeltingsmelting ooff cobalt,cobalts oorr foforr explosioexplosionn controlcontrol inin "dusting""dusting" coacoall mines"mines.

AAtt DolomiteDolomite,, UtahUtah,, ththee dolomitdolomitee rocrockk iiss burneburnedd intointo

"dolomitic"dolomitic limelimetl" producproductt whic\>111ichh iiss hydratehydratedd anandd useusedd iinn thethe manufacturemanufacture ofof masonrymasonry mortarsmortars andand plasteplasterr products"products.

ConstantConstant controlcontrol analysesanalyses areare runrun onon thethe processedprocessed pro-pro­ ductsducts involvedinvolved andand alsoalso oonn ththee raraww limestonlimestonee andand dolomite"dolomite.

TheThe CaO/insolubleCaO/insoluble residueresidue ratiratioo isis a veryvery importanimportantt parpartt ofof thesethese analysesanalyses asas wellwell asas thethe CaD,CaO, MgMgOO content"content. SomeSome typi­typi­ calcal analysesanalyses areare shownshown onon TableTable I"1.

QuarryingQuarrying OperationsOperations

QuarryingQuarrying isis thethe principalprincipal miningmining operationoperation carriedcarried onon herehere althoughalthough therethere areare twotwo undergroundunderground lev~lslevels fromfrom whichwhich highhigh gradegrade limestonelimestone isis bein'gbeing taken"taken. InIn anan operationoperation suchsuch asas this, blastingblasting isis perhapsperhaps thethe mostmost importantImportant phasephase ofof thethe \lOrl;:.work forfor allall thatthat renainsremains toto bebe donedone whenwhen thisthis isis accomplishedaccomplished isis thethe transportationtransportation ofof thethe brokonbroken rockrock toto thethe plantplant forfor pr~csc~iDgoprocessing. TABLETABLE 11

ANALYSIAEALYS1SS OFOF ROCKROCK ANANDD ROCKROCK PRODUCTS ,~ FLUX:,FLUX, AImAND DOLOHITE-,-DOLOMITE, UTA1-:UTAH

HydratedHydrated limelime productproduct

CaOCaO - 7^*8% MgHgOO - 3o9^ 1) R203 - 1) R203 - O.h-7% 2)2) LOILOI - 2000%20oO% 3)3) I11sol-In sol- 201%2.1$

LimestoneLimestone - highighh calciumcalcium - •g-fax- x l-~1-g- inchesinches

CaO - $+.2% MgO - 0.5$ l) R2O3 - Oo7^

Si02 - 2o0^

PulverizedPulverized limestonelimestone

CaOCaO - 94.3~91+.3/£ MgMgOO - 1074%1.7+%

1)1) RR203203 - 007%0«7^

Si02Si02 - 2.6%2.6%

DolomiteDolomite "limestone""limestone"

CaOCaO - 30030.97 977b$ MgNgOO - 20099%20*99$ 1)1) R2OR2033 - 0062%0.62$

8i02S102 - 0025%0.25$

1)1) R - (AI(Al ,.. Fe)Fe) 2)2) LOiLOI - lossloss onon ignitionignition 3)3) 1nsolInsol - insolubleinsoluble residueresidue 5k

\. A successfulsuccessful blastblast isis oneone thatthat combinescombines thethe greatgreates att volumvolumee ofof rocrockk movedmoved downdown withwith thethe greatestgreatest fragmentationfragmentation ofof rockrock aChieved.achieved.

InIn preparatiopreparationn forfor thethe blasting~blasting, a portablportablee wagonwagon churnchurn drilldrill isis usedused toto drilldrill outout thethe "toe""toe" oror basbasee ofof thethe qt.w.rrYDquarry.

T\voTwo rowro\~ss ofof holeholess areare drilleddrilled intointo thethe faceface aabou boutt 1212 feetfeet apartapart horizontallyhorizontally andand 2k24 feetfeet deapodeep. TheThe holeholess areare 6 f0~tfeet apartapart verticallyvertically onon thethe faceface bubutt theythey areare drilleddrilled aatt 5uchsuch ~~an angleangle onon ththee verticalvertical planplanee thatthat theythey bottobottOMm 1212 feetfeet fronfrom eacheach other.other. TheseThese holesholes areare liS"sprung prung "II oror enlarGedenlarged byby ththee (1;3-de­ tonationtonation ofof successuccessivel si velyy largerlarger dynamitedynamite chargescharges inin sever-alseveral stages.stages. ThisThis initialinitial pertpart ofof thethe operationoperation isis completedcompleted whenwhen pevlderpowder chamberschambers ofof ththee requirerequiredd sizesize forfor thethe maimainn blastblast areare obtained.obtained.

FollowingFollowing this,this, a cagecage isis drawndrawn upup thethe sideside ofof ththee cliffcliff andand atat 12-foot12-foot intervals,intervals, thethe twotwo menmen ridingriding itit drilldrill a groupgroup ofof 4k oror 5 shotshot holesholes intointo thethe cliffcliff face.o TheseThese holeholess aver­aver­ ageage 242k feetfeet inin 'depth'depth andand thoughthough relativelrelativelyy closeclose togethertogether cnen thethe face,face, theythey bottombottom aboutabout 1212 feetfeet apartapart inin thethe horizontalhorizontal plane.plane.

TheseThese shot-holeshot-hole groupsgroups areare drilleddrilled aboutabout everE-3Veryy 5500 feetfeet acrossacross thethe areaarea ofof ththee cliffcliff faceface toto bebe blasted.blasted.

WhenWhen ththee shot-holeshot-hole patterpatternn isis completed,9 anan electricelectric blastingblasting capcap withwith a 40%k0% gelatingelatin primeprimerr isis placedplaced inin ththee backback ofof eacheach holehole andand 65% free-flcvJingfree-flowing bagbag pOI:Jderpowder isis loadedloaded inte)into eacheach oneone viiwit thh a blo'l:1ingblowing machinenachine .D A lipocLE:,t"pocket lORe}!Iload" oror pilepile ofof explosivesexplosives isis thenthen placeplacedd inin eacheach ofof thethe enlarged'cha~ber5enlarged'chambers atat 55

ththee totOGe ooff ththee clifclifff witwithh adequatadequatee primerprimero0 WheWhenn ththee ;electri ~Jctri­­

cacall circuicircuitt iiss checkecheckedd anandd determinedeterminedd ttoo bbee satisfactorysatisfactory,, thethe

blastinblastingg preparationpreparationss araree completecompleteo.

A staggered-delastaggered-delayy blasblastt iiss useusedd causingcausing ththee timetinedd explo­explo­

sionsionss ttoo worworkk againsagainstt ononee anotheanotherr anandd producproducee a chewingchewing

effecteffect greatlgreatlyy increasinincreasingg ththee fragmentationfragrnentatioDo. ThiThiss iiss eff~ctGdeffected

bbyy ththee ususee ooff milli-seconmilli-secondd deladelayy electrielectricc blastinblastingg capscapso. In­In­

stantaneousstantaneous capcapss (O's(O's)) araree useusedd aatt ththee clifclifff totoee ttoo movmovee o~tout

! ththee basbasee andand makemake rooroomm forfor thethe burdeburdenn toto fall. o ThThee "{fIRs#l s

detonatedetonate 1/25,000th1/25,000th ofof a secondsecond later,later, ththee #2«s#2 8 s,, 2/25,000ths2/2?,000ths

ooff a secondsecond later,later, etc.etc. UniformlUniformlyy timetimedd capcapss araree useusedd oonn thethe

"rib""rib" sideside ofof ththee quarryquarry awamvayy fromfrom thethe openopen sidsidee ttoo cucutt a

cleacleann riribb forfor latelaterr workworko.

.. 5'6?6

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