DOCSLIB.ORG

RMG 39-2 WORKING.Indd

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
RMG 39-2 WORKING.Indd 3TRATIGRAPHY AND DEPOSITIONAL ENVIRONMENTS OF THE UPPER &OX (ILLS AND LOWER (ELL #REEK &ORMATIONS AT THE #ONCORDIA (ADROSAUR 3ITE IN NORTHWESTERN 3OUTH $AKOTA -ARY # #OLSON 2USSELL / #OLSON AND 2ON .ELLERMOE -OORHEAD *UNIOR (IGH -OORHEAD -. 53! $EPARTMENT OF !NTHROPOLOGY AND %ARTH 3CIENCE -INNESOTA 3TATE 5NIVERSITY -OORHEAD -OORHEAD -. 53! $EPARTMENT OF "IOLOGY #ONCORDIA #OLLEGE -OORHEAD -. 53! !UTHOR TO WHOM CORRESPONDENCE SHOULD BE ADDRESSEDCOLSON MNSTATEEDU !"342!#4 -ANY OF THE DINOSAUR BEARING BONE BEDS IN THE (ELL #REEK &ORMATION OF THE $AKOTAS AND -ONTANA INVOLVE MULTIPLE SPECIES PRESERVED IN THE UPPER (ELL #REEK &ORMATION )N CONTRAST THE #ONCORDIA (ADROSAUR 3ITE IS MONO SPECIFIC WITH RESPECT TO DINOSAURIAN TAXA AND IS SITUATED IN THE LOWER (ELL #REEK &ORMATION IN A LITHOSTRATIGRAPHIC UNIT WE ASSOCIATE WITH THE ,ITTLE "EAVER #REEK -EMBER 4HIS MEMBER CONSISTS OF ORGANIC RICH SANDSTONES SILTSTONES AND CLAYSTONES THAT ARE DISTINCTIVE WITHIN THE (ELL #REEK &ORMATION BASED ON THEIR UNIFORMLY FINE GRAIN SIZE PUR PLISH COLOR AND PRESENCE OF HIGHLY LIGNITIC SHALE RATHER THAN COAL 3IMILAR LIGNITIC DEPOSITS OCCUR AT OTHER MARINEn TERRESTRIAL BOUNDARIES OF THE &OX (ILLSn(ELL #REEK &ORMATIONS IN THE ,ITTLE -ISSOURI AND -ISSOURI 2IVER VALLEYS 4HE BONE BED AT THE #ONCORDIA (ADROSAUR 3ITE #(3 IS ASSOCIATED WITH AN EXTENSIVE COASTAL SWAMP RATHER THAN A LOCALIZED FLUVIAL SUBENVIRONMENT SUCH AS RIVER CHANNEL FLOODPLAIN OR ABANDONED CHANNEL 4HE BONE BED ITSELF LIES AT THE TRANSITION FROM AN EXTENSIVE SWAMP REPRESENTED BY HIGHLY ORGANIC MUDSTONES TO A MORE FLUVIALLY DOMINATED DISTRIBUTARY ENVIRONMENT CHARACTERIZED BY VARIEGATED MUDSTONES SILTSTONES AND CHANNEL SANDSTONES 4HE THIRTY METERS OF EXPOSED SECTION AT THE #ONCORDIA SITE INCLUDE THE TOP OF THE &OX (ILLS &ORMATION AND LOWER PARTS OF THE (ELL #REEK &ORMATION 7E IDENTIFY MARINE SILTS MUDS AND SANDS COASTAL DUNE SANDS COASTAL SWAMP MUDS AND SILTS AND FLUVIAL SANDS AND SILTS 4HE SEDIMENTS ARE INDICATIVE OF THE MARINEnTERRESTRIAL TRANSITION FROM UPPER SHORE FACE AND FORESHORE ENVIRONMENTS TO A COMPLEX SYSTEM OF COASTAL DUNES SWAMPS AND DISTRIBUTARY CHANNELS THAT FORMED DURING THEPROGRADATION OF THE(ELL #REEK SEDIMENTS INTO THE#RETACEOUS &OX (ILLS SEAWAY ,OCALLY GRAIN SIZE ANDORGANIC FRACTION VARIED DUE TO DIFFERENCES IN THE PROXIMITY TO DISTRIBUTARY CHANNELS SUPPLY OF ORGANIC MATERIAL AND WATER DEPTH $ESPITE THE CONCENTRATION OF BONES DOMINATED BY A SINGLE SPECIES IN THE #(3 BONE BED THE HIGH CLAY FRACTION OF THE BONE BED MATRIX COMBINED WITH THE FACT THAT THE LOWEST PART OF THE BONE BED HAS THE GREATEST CLAY FRACTION INDI CATES THAT THE BONES WERE NOT INTRODUCED BY WAY OF A HIGH ENERGY CATASTROPHIC EVENT SUCH AS A FLOOD 2ATHER THE BONES ACCUMULATED IN AN AREA OF QUIET STANDING WATER !LTHOUGH PRELIMINARY EXAMINATION OF THE BONES IS CONSISTENT WITH THIS DEPOSITIONAL INTERPRETATION IT DOES NOT NECESSARILY PROVIDE DIRECT SUPPORT FOR IT +%9 7/2$3 COASTAL PROGRADATION #RETACEOUS %DMONTOSAURUS &OX (ILLS &ORMATION (ELL #REEK &ORMATION -AASTRICHTIAN .ORTH $AKOTA 3OUTH $AKOTA ).42/$5#4)/. INTERPRET NINE DEPOSITIONAL UNITS EXPOSED AT THE #(3 THAT 4HE PURPOSES OF THIS PAPER ARE TO DOCUMENT THE DEPO SPAN THE UPPER &OX (ILLS &ORMATION AND THE LOWER (ELL SITIONAL ENVIRONMENTS ACROSS THE &OX (ILLSn(ELL #REEK FOR #REEK &ORMATION /THER MARINEnTERRESTRIAL TRANSITIONS MATIONAL CONTACT AT THE #ONCORDIA (ADROSAUR 3ITE #(3 IN THE LOWER (ELL #REEK &ORMATION ARE ALSO EXAMINED ANDTODISCUSSTHERELATIONSHIPOFDEPOSITIONALENVIRONMENTS 4HE #(3 IS LOCATED IN A BLUFF ALONG THE 'RAND 2IVER TO THE PRESERVATION OF THIS RICH BONE BED 7E DESCRIBE AND IN #ORSON #OUNTY OF NORTHWESTERN 3OUTH $AKOTA 4HE 2OCKY -OUNTAIN 'EOLOGY V NO P n FIGS TABLES $ECEMBER - # #/,3/. 2 / #/,3/. !.$ 2 .%,,%2-/% BONE BED IS IN THE (ELL #REEK &ORMATION FIVEMETERS ABOVE REPORTED THAT FLOOD PLAIN AND CHANNEL DEPOSITS IN THE (ELL ITS CONTACT WITH THE &OX (ILLS &ORMATION 4HE BONE BED #REEK &ORMATION OF EASTERN -ONTANA AND WESTERN .ORTH IS CM THICK AND EXTENDS THE ENTIRE METER LENGTH $AKOTA PRESERVE THE LARGEST FRACTION OF THE TOTAL DINOSAU OF THE BLUFF !PPROXIMATELY SQUARE FEET OF THE BONE RIAN FAUNA WITH MEMBERS OF AT LEAST EIGHT FAMILIES REPRE BED HAVE BEEN EXCAVATED AT THE EAST END OF THE BLUFF PRI SENTED MARILY FROM TWO QUARRIES YIELDING NEARLY HADROSAUR BONES IDENTIFIED AS %DMONTOSAURUS #OLLECTED SPECIMENS ARE HOUSED AT #ONCORDIA #OLLEGE 342!4)'2!0()# 3%44).' $ISCOVERIES IN THE#(3 ADD SIGNIFICANTLY TO OUR UNDER STANDING OF ,ATE #RETACEOUS ENVIRONMENTS IN NORTHWEST )NTRODUCTION ERN 3OUTH $AKOTA 4HE #(3 IS LOCATED IN EASTERN PARTS OF 4HE &OX (ILLSn(ELL #REEK FORMATIONAL TRANSITION THE (ELL #REEK &ORMATIONS OUTCROP AREA OF 3OUTH $AKOTA RECORDS THE INTERMINGLING OF MARINE BRACKISH AND TER IN A LESS STUDIED AREA THAN OTHER EXPOSURES OF THE FORMA RESTRIAL PALEO ENVIRONMENTS AS THEIR REPRESENTATIVE SEDI TION *OHNSON ET AL )T IS SITUATED JUST ABOVE THE MENTS PROGRADED TOWARD THE #RETACEOUS 7ESTERN )NTERIOR MARINEnTERRESTRIAL TRANSITION FROM THE UPPER PART OF THE 3EAWAY 4HE CONTACT BETWEEN THE TWO FORMATIONS AND THE &OX (ILLS &ORMATION INTO THE LOWER PART OF THE (ELL #REEK STRATA ABOVE AND BELOW IT HAVE BEEN WELL STUDIED IN WEST &ORMATION 3EDIMENTOLOGICAL CHARACTERISTICS OF THE #(3 ERN AND SOUTH CENTRAL .ORTH $AKOTA &RYE +LETT SANDSTONES MUDSTONES AND BONE BED DIFFER SIGNIFICANTLY AND %RICKSON 7ROBLEWSKI -URPHY ET AL FROM OTHER (ELL #REEK DINOSAUR BEARING SITES WHICH ARE AND IN NORTH CENTRAL 3OUTH $AKOTA 7AAGE FOUND MOSTLY IN THE UPPER (ELL #REEK &ORMATION 4HE #HRISTIANS 0ALEOGEOGRAPHICALLY THE &OX (ILLS AND SEDIMENTOLOGY ALSO DIFFERS FROM OTHER BONE BEARING SITES IN (ELL #REEK &ORMATIONS OF NORTHWESTERN 3OUTH $AKOTA REP THE LOWER (ELL #REEK &ORMATION THAT ARE WITHIN A FEW MILES RESENTCOASTAL PLAINFACIES2OBERTSAND+IRSCHBAUM OF THE #(3 4HOSE SITES ARE UP SECTION NEAR THE &IRESTEEL 4HE DETAILED STRATIGRAPHY OF LOWER UNITS IN THE (ELL #OAL AND THEY CONTAIN A GREATER TAXONOMIC DIVERSITY OF #REEK &ORMATION THAT CONTAINS THE #(3 IS NOT WELL DOC DINOSAURS THAN DOES THE #(3 *ACOBSON AND 3ROKA UMENTED AND IT WAS SIMPLY MAPPED AS UNDIFFERENTIATED 4HE #(3 BONE BED DIFFERS FROM TYPICAL DINOSAUR LOWER (ELL #REEK BY #URTISS &URTHERMORE THE BEARING SITES OF THE (ELL #REEK &ORMATION IN THREE WAYS #(3 IS FIVE MILES WEST OF 7AAGES WESTERN MOST MAPPED )T IS IN LOWER RATHER THAN UPPER PARTS OF THE (ELL #REEK OCCURRENCE OF THE &OX (ILLS &ORMATION IN THE 'RAND 2IVER &ORMATION IT HAS A LOWER DIVERSITY OF DINOSAURS AND IT DOES VALLEY 7AAGE FIG "ASED ON OUR FORMATIONAL NOT OCCUR IN A PRIMARILY FLUVIAL DEPOSIT -ANY OF THE BEST COMPARISON AT THE #(3 WITH OTHER SITES IN SOUTHERN .ORTH DOCUMENTED VERTEBRATE SITES OF THE (ELL #REEK &ORMATION $AKOTA AND NORTHWESTERN 3OUTH $AKOTA WE PLACE STRATA OCCUR IN ITS UPPER PART )N EASTERN -ONTANA THIS IS DUE IN OF THE BLUFF IN THE UPPER &OX (ILLS AND LOWER (ELL #REEK PART TO STRATIGRAPHIC BIAS IN SAMPLING OF THE UPPER M OF &ORMATIONS 4HE STRATIGRAPHIC NOMENCLATURE OF &RYE THE (ELL #REEK &ORMATION WHERE OUTCROPS ARE LESS RUGGED IS APPLIED TO THE (ELL #REEK &ORMATION &IG AND MORE EASILY ACCESSIBLE THAN OUTCROPS IN THE LOWER PART AND WE USE THE NOMENCLATURE OF 7AAGE FOR THE &OX OF THE FORMATION #LEMENS !NOTHER BIAS MAY (ILLS &ORMATION ,ITHOSTRATIGRAPHICALLY THE #ONCORDIA BE DUE IN PART TO GREATER INTEREST IN EVENTS RELATED TO THE (ADROSAUR 3ITE IS IN THE 4IMBER ,AKE AND )RON ,IGHTNING #RETACEOUSn4ERTIARY BOUNDARY AS RECORDED AT THE TOP OF -EMBERS OF THE &OX (ILLS &ORMATION AND IN THE ,ITTLE THE FORMATION &ASTOVSKY AND $OTT &ASTOVSKY "EAVER #REEK -EMBER &RYES NOMENCLATURE OF THE LOWER .ICHOLS AND &LEMING *OHNSON AND (ICKEY (ELL #REEK &ORMATION &IORILLO *OHNSON ET AL )N SOUTHWEST ERN .ORTH $AKOTA -URPHY ET AL REPORTED THAT &OX (ILLS &ORMATION OF 3OUTH AND .ORTH $AKOTA DINOSAURIAN FOSSILS ARE FOUND PREDOMINANTLY IN THE MIDDLE 7AAGE STUDIED THE SEDIMENTOLOGY AND PALE TO UPPER PARTS OF THE (ELL #REEK &ORMATION 4HESE REMAINS ONTOLOGY OF THE &OX (ILLS &ORMATION OF THE 'RAND ARE FOUND IN FLUVIAL STRATA AND INCLUDE MANY SPECIES &RYE AND -OREAU 2IVER VALLEYS OF 3OUTH $AKOTA :IEBACH -OORE "UTLER &ASTOVSKY AND $OTT WESTERN $EWEY AND EASTERN #ORSON #OUNTIES (E &ASTOVSKY *OHNSON AND (ICKEY DIVIDED THE &OX (ILLS &ORMATION INTO THREE MEMBERS (OGANSON ET AL /AKLAND AND 0EARSON &IG AND DOCUMENTED A PROGRESSIVE hFRESHENINGv &IORILLO 7HITE ET AL 7HITE ET AL AS THE MARINE ENVIRONMENTS REPRESENTATIVE OF THE LOW 2OCKY -OUNTAIN 'EOLOGY V NO P n FIGS TABLES $ECEMBER 342!4)'2!0(9 !.$ $%0/3)4)/.!, %.6)2/.-%.43 /& 4(% #/.#/2$)! (!$2/3!52 3)4% ! ! "# $ % !& # !" # $% ' # " ( ( )$*+ !' # ! & ( " ! ! ", # $ ( ( ! %! -! . ! ! , ' #/ &IGURE 3TRATIGRAPHIC NOMENCLATURE AND BRIEF LITHOLOGIC DESCRIPTIONS FOR &OX (ILLS &ORMATION OF 3OUTH $AKOTA AND (ELL #REEK &ORMATION OF .ORTH $AKOTA !STERISKS INDICATE ROCK UNITS PRESENT AT #ONCORDIA (ADROSAUR 3ITE ERMOST 4RAIL #ITY -EMBER CHANGED UP SECTION TO THE &ORMATION (E INTERPRETED THE UPPER &OX (ILLS AND LOWER BRACKISH CONDITIONS OF THE )RON ,IGHTNING -EMBER (ELL #REEK &ORMATIONS TO BE DELTAIC FACIES ! VARIANT OF 7AAGE DIVIDED BOTH THE TOP AND BOTTOM MEMBERS THE #OLGATE LITHOFACIES FOUND IN %MMONS #OUNTY .ORTH INTO TWO LITHOFACIES TO ACCOMMODATE LATERAL VARIABILITY $AKOTA WAS DOCUMENTED BY +LETT AND %RICKSON WITHIN EACH MEMBER &IG 7AAGE P NOTED AND ASSIGNED THE NAME ,INTON
Load more

Recommended publications
  • Stratigraphy and Paleontology of Mid-Cretaceous Rocks in Minnesota and Contiguous Areas
    Stratigraphy and Paleontology of Mid-Cretaceous Rocks in Minnesota and Contiguous Areas GEOLOGICAL SURVEY PROFESSIONAL PAPER 1253 Stratigraphy and Paleontology of Mid-Cretaceous Rocks in Minnesota and Contiguous Areas By WILLIAM A. COBBAN and E. A. MEREWETHER Molluscan Fossil Record from the Northeastern Part of the Upper Cretaceous Seaway, Western Interior By WILLIAM A. COBBAN Lower Upper Cretaceous Strata in Minnesota and Adjacent Areas-Time-Stratigraphic Correlations. and Structural Attitudes By E. A. M EREWETHER GEOLOGICAL SURVEY PROFESSIONAL PAPER 1 2 53 UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON 1983 UNITED STATES DEPARTMENT OF THE INTERIOR JAMES G. WATT, Secretary GEOLOGICAL SURVEY Dallas L. Peck, Director Library of Congress Cataloging in Publication Data Cobban, William Aubrey, 1916 Stratigraphy and paleontology of mid-Cretaceous rocks in Minnesota and contiguous areas. (Geological Survey Professional Paper 1253) Bibliography: 52 p. Supt. of Docs. no.: I 19.16 A. Molluscan fossil record from the northeastern part of the Upper Cretaceous seaway, Western Interior by William A. Cobban. B. Lower Upper Cretaceous strata in Minnesota and adjacent areas-time-stratigraphic correlations and structural attitudes by E. A. Merewether. I. Mollusks, Fossil-Middle West. 2. Geology, Stratigraphic-Cretaceous. 3. Geology-Middle West. 4. Paleontology-Cretaceous. 5. Paleontology-Middle West. I. Merewether, E. A. (Edward Allen), 1930. II. Title. III. Series. QE687.C6 551.7'7'09776 81--607803 AACR2 For sale by the Distribution Branch, U.S.
    [Show full text]
  • Hydrogeology and Stratigraphy of the Dakota Formation in Northwest Iowa
    WATER SUPPLY HYDROGEOLOGY AND J.A. MUNTER BULLETIN G.A. LUDVIGSON NUMBER 13 STRATIGRAPHY OF THE B.J. BUNKER 1983 DAKOTA FORMATION IN NORTHWEST IOWA Iowa Geological Survey Donald L. Koch State Geologist and Director 123 North Capitol Street Iowa City, Iowa 52242 IOWA GEOLOGICAL SURVEY WATER-SUPPLY BULLETIN NO. 13 1983 HYDROGEOLOGY AND STRATIGRAPHY OF THE DAKOTA FORMATION IN NORTHWEST IOWA J. A. Munter G. A. Ludvigson B. J. Bunker Iowa Geological Survey Iowa Geological Survey Donald L. Koch Director and State Geologist 123 North Capitol Street Iowa City, Iowa 52242 Foreword An assessment of the quantity and quality of water available from the Dakota (Sandstone) Formation 1n northwest Iowa is presented in this report. The as sessment was undertaken to provide quantitative information on the hydrology of the Dakota aquifer system to the Iowa Natural Resources Council for alloca tion of water for irrigation, largely as a consequence of the 1976-77 drought. Most area wells for domestic, livestock, and irrigation purposes only partial ly penetrated the Dakota Formation. Consequently, the long-term effects of significant increases in water withdrawals could not be assessed on the basis of existing wells. Acquisition of new data was based upon a drilling program designed to penetrate the entire sequence of Dakota sediments at key loca tions, after a thorough inventory and analysis of existing data. Definition of the distribution, thickness, and lateral and vertical changes in composition of the Dakota Formation has permitted the recognition of two mem bers. Additionally, Identification of the rock units that underlie the Dakota Formation has contributed greatly to our knowledge of the regional geology of northwest Iowa and the upper midwest.
    [Show full text]
  • The Cretaceous System in Central Sierra County, New Mexico
    The Cretaceous System in central Sierra County, New Mexico Spencer G. Lucas, New Mexico Museum of Natural History, Albuquerque, NM 87104, [email protected] W. John Nelson, Illinois State Geological Survey, Champaign, IL 61820, [email protected] Karl Krainer, Institute of Geology, Innsbruck University, Innsbruck, A-6020 Austria, [email protected] Scott D. Elrick, Illinois State Geological Survey, Champaign, IL 61820, [email protected] Abstract (part of the Dakota Formation, Campana (Fig. 1). This is the most extensive outcrop Member of the Tres Hermanos Formation, area of Cretaceous rocks in southern New Upper Cretaceous sedimentary rocks are Flying Eagle Canyon Formation, Ash Canyon Mexico, and the exposed Cretaceous sec- Formation, and the entire McRae Group). A exposed in central Sierra County, southern tion is very thick, at about 2.5 km. First comprehensive understanding of the Cretaceous New Mexico, in the Fra Cristobal Mountains, recognized in 1860, these Cretaceous Caballo Mountains and in the topographically strata in Sierra County allows a more detailed inter- pretation of local geologic events in the context strata have been the subject of diverse, but low Cutter sag between the two ranges. The ~2.5 generally restricted, studies for more than km thick Cretaceous section is assigned to the of broad, transgressive-regressive (T-R) cycles of 150 years. (ascending order) Dakota Formation (locally deposition in the Western Interior Seaway, and includes the Oak Canyon [?] and Paguate also in terms of Laramide orogenic
    [Show full text]
  • Mesozoic Stratigraphy at Durango, Colorado
    160 New Mexico Geological Society, 56th Field Conference Guidebook, Geology of the Chama Basin, 2005, p. 160-169. LUCAS AND HECKERT MESOZOIC STRATIGRAPHY AT DURANGO, COLORADO SPENCER G. LUCAS AND ANDREW B. HECKERT New Mexico Museum of Natural History and Science, 1801 Mountain Rd. NW, Albuquerque, NM 87104 ABSTRACT.—A nearly 3-km-thick section of Mesozoic sedimentary rocks is exposed at Durango, Colorado. This section con- sists of Upper Triassic, Middle-Upper Jurassic and Cretaceous strata that well record the geological history of southwestern Colorado during much of the Mesozoic. At Durango, Upper Triassic strata of the Chinle Group are ~ 300 m of red beds deposited in mostly fluvial paleoenvironments. Overlying Middle-Upper Jurassic strata of the San Rafael Group are ~ 300 m thick and consist of eolian sandstone, salina limestone and siltstone/sandstone deposited on an arid coastal plain. The Upper Jurassic Morrison Formation is ~ 187 m thick and consists of sandstone and mudstone deposited in fluvial environments. The only Lower Cretaceous strata at Durango are fluvial sandstone and conglomerate of the Burro Canyon Formation. Most of the overlying Upper Cretaceous section (Dakota, Mancos, Mesaverde, Lewis, Fruitland and Kirtland units) represents deposition in and along the western margin of the Western Interior seaway during Cenomanian-Campanian time. Volcaniclastic strata of the overlying McDermott Formation are the youngest Mesozoic strata at Durango. INTRODUCTION Durango, Colorado, sits in the Animas River Valley on the northern flank of the San Juan Basin and in the southern foothills of the San Juan and La Plata Mountains. Beginning at the northern end of the city, and extending to the southern end of town (from north of Animas City Mountain to just south of Smelter Moun- tain), the Animas River cuts in an essentially downdip direction through a homoclinal Mesozoic section of sedimentary rocks about 3 km thick (Figs.
    [Show full text]
  • Reservoir Characterization of the Cretaceous Cedar Mountain and Dakota Formations, Southern Uinta Basin: Year-One Report
    Reservoir Characterization of the Cretaceous Cedar Mountain and Dakota Formations, Southern Uinta Basin: Year-One Report Mary L. McPherson McPherson Geologic Consulting 86 South 3500 West Vernal, UT 84078 435-781-8025 [email protected] Brian S. Currie Department of Geology 114 Shideler Hall Miami University Oxford, OH 45056 513-529-7578 [email protected] Justin S. Pierson Department of Geology 114 Shideler Hall Miami University Oxford, OH 45056 513-529-3216 [email protected] This open-file report was prepared by the authors under contract to the Utah Department of Natural Resources, Utah Geological Survey. The report has not undergone the full UGS review process, and may not necessarily conform to UGS technical, editorial, or policy standards. Therefore, it may be premature for an individual or group to take action based on its content. The Utah Department of Natural Resources, Utah Geological Survey, makes no warranty, expressed or implied, regarding the suitability of this product for a particular use. The Utah Department of Natural Resources, Utah Geological Survey, shall not be liable under any circumstances for any direct, indirect, special, incidental, or consequential damages with respect to claims by users of this product. Open-File Report 492 Utah Geological Survey a division of Utah Department of Natural Resources 2006 TABLE OF CONTENTS LIST OF FIGURES .........................................................................................................................i LIST OF TABLES.........................................................................................................................
    [Show full text]
  • Geologic Resources Inventory Map Document for Fort Larned National Historic Site
    U.S. Department of the Interior National Park Service Natural Resource Stewardship and Science Directorate Geologic Resources Division Fort Larned National Historic Site GRI Ancillary Map Information Document Produced to accompany the Geologic Resources Inventory (GRI) Digital Geologic Data for Fort Larned National Historic Site fols_geology.pdf Version: 6/26/2015 I Fort Larned National Historic Site Geologic Resources Inventory Map Document for Fort Larned National Historic Site Table of Contents Geologic R.e..s.o..u..r.c..e..s.. .I.n..v.e..n..t.o..r..y. .M...a..p.. .D..o..c..u..m...e..n..t....................................................................... 1 About the N..P..S.. .G...e..o..l.o..g..i.c. .R...e..s.o..u..r.c..e..s.. .I.n..v.e..n..t.o..r..y. .P...r.o..g..r.a..m........................................................... 2 GRI Digital .M...a..p.. .a..n..d.. .S..o..u..r.c..e.. .M...a..p.. .C..i.t.a..t.i.o..n............................................................................... 4 Map Unit Li.s..t.......................................................................................................................... 5 Map Unit De..s..c..r.i.p..t.i.o..n..s............................................................................................................. 6 Qal - Alluvi.u..m... .(.H..o..l.o..c..e..n..e..)............................................................................................................................................. 6 Qp - Uplan.d.. .in..t.e..r..m..i.t.t.e..n..t. .l.a..k.e.. .(..p..la..y..a..).. .d..e..p..o..s..it.s.. .(..la..t.e.. .P..l.e..i.s..t.o..c..e..n..e.. .t.o.. .H..o..l.o..c..e..n..e..)............................................................. 6 Qds - Eolia.n.. .d..u..n..e.
    [Show full text]
  • Stratigraphic Terminology of the Dakota Sandstone and Mancos Shale, West-Central New Mexico
    Stratigraphic Terminology of the Dakota Sandstone and Mancos Shale, West-Central New Mexico GEOLOGICAL SURVEY BULLETIN 1372-J 1 * t I t I I I Stratigraphic Terminology of the Dakota Sandstone and Mancos Shale, West-Central New Mexico By E. R. LANDIS, C. H. DANE, and W. A. COBBAN CONTRIBUTIONS TO STRATIGRAPHY GEOLOGICAL SURVEY BULLETIN 1372-J A study of the generally transgressive rock sequence at the base of the Cretaceous System four new rock units are described UNITED STATES GOVERNMENT PRINTING OFFICE. WASHING ION : 1973 UNITED STATES DEPARTMENT OF THE INTERIOR ROGERS C. B. MORTON, Secretary GEOLOGICAL SURVEY V. E. McKelvey, Director Library of Congress catalog-card No. 73-600171 For sale by the Superintendent of Documents, U. S. Government Printing Office, Washington, D. C. 20402 - Price 45 cents domestic postpaid or 3<* cents GPO Bookstore Stock Number 2401-00364 CONTENTS Page Abstract.................................................................................................................. Jl Introduction and acknowledgments........................................ ......................... 1 Stratigraphy.......................................................................................................... 2 Twowells Sandstone Tongue of the Dakota Sandstone and the Whitewater Arroyo Shale Tongue of the Mancos Shale............... 8 Paguate Sandstone Tongue of the Dakota Sandstone............................ 11 Clay Mesa Shale Tongue of the Mancos Shale........................................ 16 Cubero Sandstone Tongue of
    [Show full text]
  • Dakota and Adjacent Morrison And
    New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/58 Dakota and adjacent Morrison and Lower Mancos stratigraphy (Cretaceous and Jurassic) in the Holy Ghost Spring quadrangle, land of pinchouts, Jemez and Zia Indian reservations, New Mexico Donald E. Owen, Charles T. Siemers, and Owen, Donald E., Jr., 2007, pp. 188-194 in: Geology of the Jemez Region II, Kues, Barry S., Kelley, Shari A., Lueth, Virgil W.; [eds.], New Mexico Geological Society 58th Annual Fall Field Conference Guidebook, 499 p. This is one of many related papers that were included in the 2007 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members have access to all papers. This is in keeping with our mission of promoting interest, research, and cooperation regarding geology in New Mexico. However, guidebook sales represent a significant proportion of our operating budget. Therefore, only research papers are available for download.
    [Show full text]
  • Hovenweep U.S
    National Park Service Hovenweep U.S. Department of the Interior Hovenweep National Monument Geology This pothole, worn into the Dakota Sandstone on the canyon rim, was formed by a combination of water and wind erosion. Potholes collect and hold water thus providing a unique microenvironment for communities of algae, mosses, fairy shrimp, and insects. History Hovenweep National Monument is located on After the Burro Canyon Formation was Cajon Mesa in the northwest quadrant of the deposited there was a fairly long period of San Juan River Basin. Mesa means ‘table’ in erosion lasting almost until the end of Mid- Spanish and generally implies a highland that Cretaceous times. In geology this is known is fairly fl at on top. Cajon Mesa is tilted to the as an “unconformity” because one or more southwest starting at 6,800 feet near Cutthroat layers of rock are missing from the geologic Castle and ending up at 4,950 feet southwest record - usually due to erosion. of Cajon ruin. Deposited during late Cretaceous times Despite the many deep and revealing canyons (30-70 million years ago) and representing a on Cajon Mesa, only two geologic formations transition from river to swamp to marginal are easily visible at Hovenweep. The earlier of marine conditions, porous Dakota Sandstone these to be deposited was the Burro Canyon is the caprock on Cajon Mesa and the other Formation laid down between 100 and 136 layer visible from within the monument. It million years ago in the early Cretaceous comprises the open slickrock on the canyon period by a river and fl oodplain complex rims and was utilized as a building material containing occasional small brackish ponds.
    [Show full text]
  • Dinosaurs Found in Utah Record Chart
    UTAH’S DINOSAUR RECORD GEOLOGIC UTAH’S MESOZOIC TIME SCALE ROCK RECORD Southern Tyrannosaurus Torosaurus & Alamosaurus fauna Tyrannosaurus Alamosaurus ankylosaurid teeth long-horned 65 NORTH HORN FORMATION centrosaurines Maastrichtian Ornithomimus new chasmosaurines Hagryphus DINOSAUR Highest diversity North America ceratopsid & KAIPAROWITS FORMATION hadrosaurid fauna Gryposaurus Edmontonia EXTINCTION 75 Campanian new tyrannosaurids Parasaurolophus new tyrannosaurid First centrosaurines Diabloceratops WAHWEAP FORMATION - MASUK FORMATION & hadrosaurids new hadrosaurine pachycephalosaurs nodosaurids Santonian Upper STRAIGHT CLIFFS FORMATION Diverse tooth fauna Blue Gate Member MANCOS SHALE First ceratopsomorphs Coniacian Zuniceratops advanced nodosaurid National Monument Ferron Sandstone - Smoky Hollow Member Nothronychus hadrosauromorphs teeth Turonian Local extinction Pachycephalosaurid TROPIC SHALE. - Tununk Member MANCOS SHALE of sauropods Grand Sraircase - Escalante teeth ornithomimid DAKOTA FORMATION Asian immigration tiny Cenomanian ornithopod Eolambia Mussentuchit Member induced extinction tyrannosaurid and origin of North teeth tiny pleurocoelid 100 troodontid teeth American Late neoceratopsian teeth Animantarx brachiosaurid teeth Cretaceous dinosaur Albian fauna Ruby Ranch Cedarpelta Member Isolation of North Tennontosaurus nodosaurids America resulting Abydosaurus in local extinctions pleurocoelid Deinonychus and increased Acrocanthosaurus brachiosaurids Aptian FORMATION endemism Nedcolbertia new camarasaurid Poison Strip Sandstone
    [Show full text]
  • Kinematics Analysis of Laramide Deformation in North-Central New
    KINEMATICS ANALYSIS OF LARAMIDE DEFORMATION IN NORTH-CENTRAL NEW MEXICO ____________________________________________ A Thesis Presented to the Faculty of the Department of Earth and Atmospheric Sciences University of Houston ____________________________________________ In Partial Fulfillment Of the Requirements for the Degree Master of Science ____________________________________________ By Hongge Kan December 2012 KINEMATICS ANALYSIS OF LARAMIDE DEFORMATION IN NORTH-CENTRAL NEW MEXICO _______________________________________________ Hongge Kan APPROVED _______________________________________________ Dr. Alexander Robinson _______________________________________________ Dr. Michael Murphy _______________________________________________ Dr. Ran Zhang _______________________________________________ Dean, College of Natural Sciences and Mathematics ii ACKNOWLEDGEMENTS I express gratitude to Dr. Alexander Robinson for his direction and supervising this thesis. Dr. Robinson’s attitude towards knowledge and his patience to students taught me what a real geologist and professor is, and will influence me for the rest of my life. I also thank Dr. Murphy for his help and directions. I think he always brought much optimism and happiness to the people around him. I thank Dr. Zhang’s suggestion on my career and further study of Geology. I also appreciate my friends An Li and Yiduo Liu who always cared about my research and shared their sharp opinions with me. I am thankful for the support of my parents who never give up on me. iii KINEMATICS ANALYSIS
    [Show full text]
  • Geology and Groundwater Resources of Park County
    OPEN FILE REPORT 15-11 Geology and Groundwater Resources of Park County By Peter E. Barkmann, Lesley Sebol, F Scot Fitzgerald, William Curtiss Colorado Geological Survey Colorado School of Mines Golden, Colorado 2015 TABLE OF CONTENTS TABLE OF CONTENTS ........................................................................................................................ ii LIST OF FIGURES ............................................................................................................................... iv LIST OF PLATES ................................................................................................................................. iv LIST OF TABLES .................................................................................................................................. v ACKNOWLEDGMENTS ....................................................................................................................... vi INTRODUCTION .................................................................................................................................... 1 BACKGROUND AND PURPOSE ............................................................................................................ 1 GEOLOGY OF PARK COUNTY ........................................................................................................... 3 REGIONAL SETTING .............................................................................................................................. 3 MAJOR ROCK UNITS AND STRATIGRAPHY ......................................................................................
    [Show full text]