Oregon Geologic Digital Compilation Rules for Geology Merge Information Entry

State of Oregon Department of Geology and Mineral Industries Vicki S. McConnell, State Geologist

OREGON GEOLOGIC DIGITAL COMPILATION RULES FOR GEOLOGY MERGE INFORMATION ENTRY

G E O L O G Y F A N O D T N M I E N M E T R

R A A L

I E

R E

S O

1937

2006

Revisions: Feburary 2, 2005 January 1, 2006 NOTICE

The Oregon Department of Geology and Mineral Industries is publishing this paper because the information furthers the mission of the Department. To facilitate timely distribution of the information, this report is published as received from the authors and has not been edited to our usual standards.

Oregon Department of Geology and Mineral Industries Oregon Geologic Digital Compilation Published in conformance with ORS 516.030

For copies of this publication or other information about Oregon’s geology and natural resources, contact: Nature of the Northwest Information Center 800 NE Oregon Street #5 Portland, Oregon 97232 (971) 673-1555 http://www.naturenw.org

Oregon Department of Geology and Mineral Industries - Oregon Geologic Digital Compilation i RULES FOR GEOLOGY MERGE INFORMATION ENTRY Geology Merge Label Explanation/Abbreviations

The geology merge unit contains 7 parts, separated by periods: General category.AGE.stratigraphic name.Lithology

Geology Merge Unit label (Geol_Mrg_U ﬁ eld in GIS polygon ﬁ le): General category.AGE.stratigraphic name.Lithology

General category - in lower case, restricted to a single principal overall lithology, and generally three characters (this ﬁ rst term is an abbreviation of the simplest general word most descriptive of the rock unit)

.AGE - in upper case, reﬂ ects a single age (Eocene) or a maximum and minimum (Pleistocene/Pliocene), generally limited to four characters. Ages listed from oldest to youngest.

.Stratigraphic name - in lower case, all the elements of the stratigraphic nomenclature are contained in four separate ﬁ elds: Terrane/Group, Formation, Member, Unit, and will not be limited as to the number of characters. In cases where no stratigraphy was available for a unit, like Qal, then the geologic process can go in this space instead of the stratigraphy, or the space can be left as “nd”

.Lithology - in lower case, if a unit has a primary rock type, then the abbreviation for that type is listed. If a unit has a number of rock types, it can be listed as “mix”, “undivided”, the space can be left blank

srx.Tr.of.fc.nd.nd.ﬁ ne = sedimentary rocks.Triassic.Olds Ferry Terrane/Fields Creek Formation. ﬁ ne-grained

NOTE: All of the terms in the different parts of the three merge labels are chosen by the DOGAMI staff and other geologists most familiar with the pertinent area’s formations and lithologies. They refl ect the present general understanding within the geologic community of the accepted stratigraphy and lithologies in that part of the state. Thus, the merge units usually reclassify the unit from the map author’s original stratigraphic scheme. The stratigraphic and the lithologic nomenclature cannot be referenced to a single publication’s defi nition of terms. Instead, they represent the general consensus among geologists, working in a particular area of the state or in a particular fi eld of geology, of a term’s defi nition at the time of the merge units’ formulation and for that version of the Oregon Geologic Framework Layer.

Oregon Department of Geology and Mineral Industries - Oregon Geologic Digital Compilation 1 Abbreviations used in Geology_Merge_Unit_Label:

General category abbreviations:

General category Abbreviation

batholith bth intrusive intr melange mge metamorphic rocks met sedimentary rocks srx sediments sed vent deposits and pyroclastics vp volcanic rocks vol

AGE Abbreviation:

Age Abbreviation

Eocene E Jurassic J Cretaceous K Miocene M Mesozoic Mz Oligocene O Pliocene P Paleocene Pa Permian Pr Pleistocene Ps Paleozoic Pz Quaternary Q Recent R Tertiary T Triassic Tr

Oregon Department of Geology and Mineral Industries - Oregon Geologic Digital Compilation 2 Stratigraphic name abbreviations:

Terrane/Group Formation Member Unit Generic Stratigraphic Name abbrev abbrev abbrev abbrev abbrev alkali basalt of Sugarloaf sl Alkali Canyon Formation ac alkali of Horsebasin hb alluvial al alluvial fan fan Alvord Creek Formation avc andesite of Fiddlers Hell fh andesite of Sawtooth Crater sws andesite of Tamarack Butte tam Badger Creek unit bc Baker Terrane bt Bald Mountain Batholith bm basalt of Barren Valley bv basalt of Buford buc basalt of Cord crd basalt of Dodge ddg basalt of Duck Creek Flat dcf basalt of Eden ed Basalt of Elephant Mountain em basalt of Ferguson Springs fg basalt of Gingko gk basalt of Harney Lake hl basalt of Lookingglass lkg basalt of Lyons Ferry ly Basalt of Malheur Gorge mg basalt of Palouse Falls pf basalt of Powatka pk basalt of Robinette Rbn basalt of Sand Hollow Sdh basalt of Sentinel Gap sg basalt of Umatilla ut basalt of Voltage vtg basanite of Horseshoe Basin hb Basey member bs Bernard ber Brisbois Formation bb Buchanan ash-flow tuff buc Bully Creek Formation byc Burns Basin Tuff bbt Burnt River Schist br Canyon Mountain Complex cmc Cinnabar Tuff Tongue ctt Clarno Formation cl Clover Creek Greenstone cc coarse cse colluvial col Columbia River Basalt Group cr continental con Coon Hollow Formation ch

Oregon Department of Geology and Mineral Industries - Oregon Geologic Digital Compilation 3 Stratigraphic name abbreviations: (continued)

Terrane/Group Formation Member Unit Generic Stratigraphic Name abbrev abbrev abbrev abbrev abbrev dacite of Mt. Emily me Dalles Group dg Dayville member dv Devine Canyon Welded Ash- flow Tuff dvl Diamond Craters Volcanics ddc Dinner Creek Ashflow Tuff dc Divine Canyon Tuff member dvt Dixie Butte member db Dooley Mountain Complex dmc Doyle Creek Formation dyc Drewsey Formation dwy Drinkwater Basalt dw Duck Creek Butte Eruptive Center dcb Elkhorn Ridge Argillite er Ellensburg Formation eb eolian eol

eruptive center of Juniper Ridge jr fan delta fdt fault flt Fields Creek Formation fc Frenchman Springs member fs glacial glc Glass Butte Complex gbc Glenns Ferry Formation gf Gold Creek greenstone gc Grande Ronde Basalt gr Graylock Formation gl Grindstone Terrane gt Harney Basin Valley Volcanic Field hbv Herren Formation hrn High Lava Plains Volcanic Province hlp Horsehead Mountain Lavas hhm Hunsaker Creek Formation hc Hunter Creek Basalt htr Huntington Volcanics hv Hurwal Formation hw Hyde Formation hy Idaho Canyon Tuff ic Idaho Group ig Imnaha Basalt im Ingels Tuff Tongue Itt Izee Group Iz Jet Creek member jc John Day Clarno jdcl John Day Formation jd

Oregon Department of Geology and Mineral Industries - Oregon Geologic Digital Compilation 4 Stratigraphic name abbreviations: (continued)

Terrane/Group Formation Member Unit Generic Stratigraphic Name abbrev abbrev abbrev abbrev abbrev Jordan Craters Volcanics jrd Jump Creek Rhyolite jmp Keller Creek Shale kc Kivett Volcanics Kv Lake Owyhee Volcanic Field lov landslide ls landslide deposits ls Laycock Graywacke lg Leslie Gulch Ash-flow Tuff leg Lithic Tuff of Soldier Creek slc

Little Catherine Creek member lcc Littlefield Rhyolite lfr Lonesome Formation ln Lookout Mountain Formation lo lower member l lower Sedimentary Series lss Magill member mg marine mar Martin Bridge Formation mb Mascall Formation ms McDermitt Volcanic Field mdv McKay Formation mk middle member m Miller Mountain Melange mm mine tailings mt Miscellaneous Mesozoic intrusives mmi Missoula Flood sediments mf Mitchell mit Monument Mountain Basalt mmw Mountain Home Complex mhc Mowich Group mw Murderers Creek Formation mc Neogene Sedimentary Rocks nsr Neogene Volcanic Rocks nvr Nevadan Intrusions nev Nicely Formation ni normal magnetostratigraphic unit 1 n1 normal magnetostratigraphic unit 2 n2 North Fork stock nf Northern Nevada Volanics nev Officer member off Olds Ferry Terrane of olistostromal blocks ol olivine basalt of Gum Boot Canyon gb

Oregon Department of Geology and Mineral Industries - Oregon Geologic Digital Compilation 5 Stratigraphic name abbreviations: (continued)

Terrane/Group Formation Member Unit Generic Stratigraphic Name abbrev abbrev abbrev abbrev abbrev olivine basalt of Twelvemile Table tt Oregon-Idaho Graben oig

Paleogene Sedimentary Rocks psr Paleogene Volcanic Rocks pvr Pedro Mountain Metamorphic Complex pmc Pedro Mountain stock pm Picture Gorge Basalt pg Pike Creek Formation pkc playa lake deposits py Plush Tuff plt pluvial lake valley deposits plv Pomona member po Powder River Formation pr Prater Creek Ash-flow Tuff pc Quaternary Surficial deposits qsd Quaternary Volcanics qv Rail Cabin Argillite rc Rattlesnake Ash-flow Tuff rt Rattlesnake Formation rt reversed magnetostratigraphic unit 1 r1 reversed magnetostratigraphic unit 2 r2 rhyodacite of Burns Butte rbb rhyolite of Gold Ranch gdn rhyolite of Iron Mountain irn rhyolite of Palamino Butte pb Rim Rock Springs rrs Robertson Formation Rb Rosebud member Rsb Roza member r Saddle Mountain Basalt sm Shaw member sh Silvies member sv Slide Creek member sc Snowshoe Formation ss

soda rhyolite of Golden Ranch gdn Sparta Complex spc Steens Basalt sb Steens Mountain Volcanics smv Strawberry Volcanics str Sunrise Butte stock sun Supplee Formation su Swisher Mountain Tuff sw terrace ter Tims Peak Basalt tp

Oregon Department of Geology and Mineral Industries - Oregon Geologic Digital Compilation 6 Stratigraphic name abbreviations: (continued)

Terrane/Group Formation Member Unit Generic Stratigraphic Name abbrev abbrev abbrev abbrev abbrev Tower Mountain Volcanics tm trachyandesite of Elgin el Trout Creek Formation tc Trowbridge Formation tb Trowbridge/Lonesome Formations tl tuff of Birch Creek bch tuff of Hampton ham tuff of Long Ridge tlr tuff of Oregon Canyon oc tuff of Trout Creek Mountains tcm tuff of Wheeler Springs whs tuff of Whitehorse Creek whc Tuffaceous Sedimenary Rocks tfx Twickenham member tw upper member u Venator Ranch Basalt vr Vester Formation v volcanics of Juniper Ridge jr Walla Walla River unit ww Wallowa Batholith wa Wallowa Terrane wt Wanapum Basalt wp Warm Springs and Weberg Formation ww Warm Springs member wsp Warner Peak Volcanics wp Weatherby Formation wb Weberg member Wbg Wild Sheep Creek Formation ws

Wildcat Basin Rhyolite member wc Wildcat Creek Ash-flow tuff wcc Willow Creek Flats wcf Windy Ridge Formation wr

Oregon Department of Geology and Mineral Industries - Oregon Geologic Digital Compilation 7