 | | Report (issue) | | Sequence Along Coal Creek to Idaho Springs Formation Front Range, Colorado By JOHN D. WELLS, DOUGLAS M...1. Index maps of the Coal Creek area, Eldorado Springs, Ralston Buttes, and Blackhawk quadrangles..-_________...SEQUENCE ALONG COAL CREEK TO IDAHO SPRINGS FORMATION, FRONT RANGE, COLORADO By JOHN D. WELLS, DOUGLAS M...high-grade metamorphic gneisses of the Idaho Springs Formation elsewhere in the Front Range. Accordingly...facies of the predominantly metasedimentary Idaho Springs Formation and not as a tectonically younger stratigraphic |  | | Report (issue) | | Geology of Precambrian Rocks Central City District Colorado GEOLOGICAL SURVEY PROFESSIONAL PAPER 474-C Prepared... Geology of Precambrian Rocks Central City District Colorado By P. K. SIMS and D. J. GABLE SHORTER CONTRIBUTIONS...1918Geology of Precambrian rocks, Central City district, Colorado, by P. K. Sims and D. J. Gable. Washington, U...district, Colorado. 1964. (Card2) 1. Geology, Stratigraphic Pre-Cambrian. 2. Geology Colorado Gilpin Co. I...district, Gilpin County, Colorado. 2. Geologic sections of the Central City district, Gilpin County, Colorado |  | | Journal (article/letter/editorial) | | ORES OF GILPIN E•soN COUNTY, COLORADO. S. BASTIN. INTRODUCTION. An exhaustive report on the economic...geology of Gilpin County and adjacentportionsof Clear Creek and Bouldercounties, Colorado,'byEdsonS....The principalminingcentersare the following: Gilpin County ................................... ['Central...OF GILPIN COUNTY, COLORADO. 263 [Idaho Springs. /Gilson. -[Alice. [Dumont. Clear Creek County ......medium{I.Idaho Springs Mostly quartzt Moderately dynamo-meta- morphosed. cies. formation. Sedimentary |  | | Report (issue) | | QlJADRANGLE (TOGETHER 'VITH THE EMPIRE DISTRICT) COLORADo· BY JOSIAH E. SPURR AND GEORGE H. GARREY WITH..................._.......... . Distribution in Colorado ................................................. . . . . . . . . . . . . . . . . . . . 97 Idaho Springs auriferous area. __ ............. _.. _. _....Boulder County.............. . . . . . . . . . . . ......... . ....... . 103 Ores in Gilpin County ........................... . 103 Orcs in Clear Creek County ............................ . 103 Ores from the |  | | Report (volume) | | (A) Geology of Precambrian rocks, Idaho Springs district, Colorado, by Robert H. Moench. (B) Geology...and iron content of rocks from the Red Mountain Formation, Alabama, by Richard P. Sheldon. (E) Investigations... Geology of Precambrian Rocks, Idaho Springs District, Colorado By ROBERT H. MOENCH CONTRIBUTIONS...of the Idaho Springs district____________ In pocket 2. Geologic sections of the Idaho Springs district...mapped by present and previous workers in the Idaho Springs district ____________________ ----- ________ |  | | Report (volume) | | . 234 " y { " ,-t .. .~,:",. I " , COLORADO "or.! _ +, (~ STATE OF .~ :'(' COL~ADO /... BULLETIN 40 RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BlaLlllGRAPHY by James L. Nelson-Moore,...Energy COLORADO GEOLOGICAL SURVEY DEPARTMENT OF NATURAL RESUURCES STATE OF COLORADO DENVER, COLORADO 1978...ete 11 st r ng of rad i aaet 1ve occurrences 1n Colorado, with a comprehensive blbi iography and bibliographic...association of radium, uranium. and vanadIum on the Colorado Plateau sparked several periods of exploratIon |  | | Report (volume) | | 931-O NICKEL DEPOSIT NEAR GOLD HILL BOULDER COUNTY, COLORADO BY E. N. GODDARD AND T. S. LOVERING Strategic.................................... 351 Idaho Springs formation.............................. 352 Boulder...Generalized geologic map of the vicinity of Gold Hill, Colorado, showing-the regional setting of the Copper King...King mine, Boulder County, Colorado..... In pocket Figure 37. Index map of Colorado showing the location... NICKEL DEPOSIT NEAR GOLD HILL, BOULDER COUNTY, COLORADO By E. N. Goddard and T. S. Levering ABSTRACT |  | | Report (issue) | | the Front Range Mineral Belt Gilpin and Clear Creek Counties. Colorado GEOLOGICAL SURVEY PROFESSIONAL...the Front Range Mineral Belt Gilpin and Clear Creek Counties, Colorado By E. W. TOOKER GEOLOGICAL SURVEY...the Front Kange mineral belt, Gilpin and Clear Creek Counties, Colorado. Washington, U.S. Govt. Print...mineral belt, Gilpin and Clear Creek Counties, Colorado. 1963. (Card 2) 1. Geology Colorado Front Range...Range. 2. Petrology Colorado Front Range. 3. Ore deposits Colorado. 4. Mineralogy Colorado Front Range. 5 |  | | Report (issue) | | Geology and Ore Deposits of the Front Range Colorado By T. S. LO\'ERING and E. N. GODDARD GEOLOGICAL...in cooperation with the Colorado State Geological Survey Board and the Colorado Metal Mining Fund ~ oopr...Metamorphic rocks ________________________ _ Idaho Springs formation _______________ _ Swandy ke hornblende...stratigraphic relations __ Fountain formation ________________ _ Ingleside formation ________________ _ Lyons sandstone...Permian(?) and Triassic(?) ______________ _ Lykins formation __________________ _ Pennsylvanian and Permian |  | | Report (volume) | | Minerals of Colorado: A 100- Year Record By EDWIN B. ECKEL GEOLOGICAL SURVEY BULLETIN 1 1 14 A...knowledge____________________________________ Future of Colorado mineralogy______________________________________...mineral localities and metallic mineral deposits of Colorado ________________________________ In pocket III...mineral localities and metallic mineral deposits of Colorado, has not been included in this reprint. Many of...especially Fischer and others, 1946). MINERALS OF COLORADO: A 100-YEAR RECORD By EDWIN B. EcKEL ABSTRACT |  | | Report (volume) | | Monazite Concentrations Central City District Colorado GEOLOGICAL SURVEY BULLETIN Prepared in part...District Colorado By E. J. YOUNG and P. K. SIMS GEOLOGY AND ORE DEPOSITS, CLEAR CREEK, GILPIN, AND LARIMER...LARIMER COUNTIES, COLORADO GEOLOGICAL SURVEY BULLETIN 1032-F Prepared in part on behalf of the U.S...Generalized geologic map of the Central City district, Colorado.___________________________________________ 67...AND ORE DEPOSITS, CLEAR CREEK, GILPIN, AND LARIMER COUNTIES, COLORADO PETROGRAPHY AND ORIGIN OF XENOTIME |  | | Journal (article/letter/editorial) | | PEGMATITES OF EIGHT MILE PARK, FREMONT COUNTY, COLORADOXT E. Wrrr. HerNnrcu, Department of Mineralogy...to twelve miles west of Canon City, Fremont County, Colorado, includes about 30 square miles that lie at...separate paper. 420 PEGMATITES OF EIGHT MILE PARK, COLORADO 42r area are flanked on the east by hogbacks...granite, Idaho Springs schist, and injection gneiss. The oldest, the Idaho Springs formation, consists...formed by large scale lit-par-lit intrusion of Idaho Springs biotite schists by granite, aplite, and pegmatite |  | | Journal (article/letter/editorial) | | PRECAMBRIAN ROCKS OF THE HALL VALLEY AREA, FRONT RANGE, COLORADO BY ERNEST E. WAHLSTROM AND OK JOON KIM ABSTRACT...The Hall Valley area, in northwestern Park County, Colorado, contains foliated highgrade Precambrian metamorphic...argument against continued use of the terms Idaho Springs formation and Swandyke gneiss for the metasedimentary...term Idaho Springs formation for the Precambrian metasedimentary rocks in the vicinity of Idaho Springs...Springs, Colorado. Later investigators extended the use of the term and applied it to practically all the |  | | Report (volume) | | Geology of the Eldorado Springs Quadrangle Boulder and Jefferson , Counties, Colorado C_-J / By JOHN D. WELLS...Sandstone_____--__--__-_-___---____________ Lykins Formation.__________________________________ Mesozoic r...rocks__________________________________________ Ralston Creek Formation.. __________________________ Morrison Formati...ILLUSTRATIONS Page PLATE 1. Geologic map of the Eldorado Springs quadrangle..___.__In pocket FIGURE 1. Index map...map showing location of the Eldorado Springs quadrangle. _ D3 2. Triangular diagrams showing mineralogical |  | | Report (issue) | | Some High-Grade Cordierite Gneisses, Front Range, Colorado Dolores J. Gable U.S. Geological Survey, Denver...SOCIETY OF AMERICA, INC. Colorado Building P.O. Box 1719 Boulder, Colorado 80302 Printed in the United...65 65 66 67 ... Vlll CORDIERITE GNEISSES, COLORADO FRONT RANGE Factors determining the mineral assen1blages...75 77 81 85 FIGURES l. Map of Front Range, Colorado ............... ................. .......... ...cordierite-bearing rocks in central part of Front Range, Colorado ................................. ....... ... |  | | Report (volume) | | OF BOULDER COUNTY, COLORADO BY T. S. LOVERING Prepared in cooperation with the COLORADO METAL MINING...MINING FUND and the COLORADO GEOLOGICAL SURVEY BOARD Strategic Minerals Investigations, 1940 (Pages 135-156)...Page Plate 24. Map showing location of Boulder County tungsten belt and general regional geology................In pocket 25. Geologic map of Boulder County tungsten belt and adjacent area..................25. Ferberite concentrates produced in Boulder County 1900-1938................. 136 26. Diagram representing |  | | Report (volume) | | Part of the Morrison Quadrangle Jefferson County, Colorado GEOLOGICAL SURVEY BULLETIN 1251-E Geology...Part of the Morrison Quadrangle Jefferson County, Colorado By D. J. GABLE CONTRIBUTIONS TO GENERAL GEOLOGY...rocks along the mountain front due west of Denver, Colorado UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON...PART OF THE MORRISON QUADRANGLE JEFFERSON COUNTY, COLORADO By D. J. GABLE ABSTRACT The Morrison quadrangle...This sequence, which is typical of the Idaho Springs Formation, was intruded, in Precambrian time, by |  | Collins, Donley S., Cobban, Robert R., Foord, Eugene E., Murphy, Jack A. (1989) Bibliography for update and revision of U.S.G.S. Bulletin 1114, Minerals of Colorado -- a 100 year record, by Edwin B. Eckel, Part A - Paper copy --Bibliography data file disks. Open-File Report Vol. 1989 (89-206) US Geological Survey doi:10.3133/ofr89206a | Report (issue) | | Survey Denver, Colorado Department of Geology, Denver Museum of Natural History Denver, Colorado NOTE FOR...revision of U.S.G.S. Bulletin 1114, Minerals of Colorado A 100 year record, by Edwin B. Eckel By Donley...Prepared in cooperation with Friends of Mineralogy - Colorado Chaptar, and the Denver Museum of Natural History...references dealing with the mineralogy of the state of Colorado. It is part of a more than 10 year effort to update...and revise U.S.G.S. Bulletin 1114, Minerals of Colorado: A 100 year record, by Edwin B. Eckel (1961). |  | | Report (issue) | | Geology and Ore Deposits of the Boulder County Tungsten District Colorado GEOLOGICAL SURVEY PROFESSIONAL ... Geology and Ore Deposits of the Boulder County Tungsten District Colorado By T. S. LOVERING and OGDEN TWETO...with the State of Colorado through the Colorado Geological Survey Board and the Colorado Metal Mining Fund...Pre-Cambrian rocks_____________________________ Idaho Springs formation_ _______________ Distribution ___...Boulder County tungsten district. 2. Claim map of the Boulder County tungsten district, Colorado. 3. Map |  | Sheridan, Douglas M., Maxwell, Charles Henry, Albee, Arden Leroy, Van Horn, Richard (1967) Geology and uranium deposits of the Ralston Buttes district, Jefferson County, Colorado, with sections on Paleozoic and younger sedimentary rocks. Professional Paper 520. US Geological Survey doi:10.3133/pp520 | Report (issue) | | Deposits of the Ralston Buttes District Jefferson County, Colorado By DOUGLAS M. SHERIDAN, CHARLES H. MAXWELL...___ _ ~ Pennsylvanian and Permian: Fountain Formation ___________________________ _ Permian: Lyons Sandstone..._____________ _ Permian(?) and Triassic(?): Lykins Formation ____________________ --· ___ _ Mesozoic rocks...________________ _ Ralston Creek Formation ___________ _ Morrison Formation _______________ _ Cretaceous...Benton Shale ______________________ _ Niobrara Formation ________________ _ Pierre Shale _______________________ |  | | Report (issue) | | Beryllium Area, Park and Jefferson t:-1 Counties, Colorado g ~ s:p ~ I> li:tl ~ GEOLOGICAL SURVEY PROFESSIONAL...Flats) Beryllium Area, Park and Jefferson Counties, Colorado By C. C. HAWLEY GEOLOGY AND ORE DEPOSITS OF THE...SOUTHERN TARRYALL REGION PARK AND JEFFERSON COUNTIES, COLORADO GEOLOGICAL SURVEY PROFESSIONAL PAPER 608-A A...rocks~ ____ ~ _______________________ _ Idaho Springs Formation ___________________ _ Amphibolite and hornblendite...SOUTHERN TARRYALL REGION PARK AND jEFFERSON COUNTIES, COLORADO GEOLOGY AND BERYLLIUM DEPOSITS OF THE LAKE GEORGE |  | | Report (issue) | | the Empire Quadrangle Grand, Gilpin, and Clear Creek Counties ColOrado. By WILLIAM A. BRADDOCK .,..,...igneous rocks in the Empire quadrangle, Grand, Gilpin, and Clear Creek Counties, Colo __ In pocket 3...CIPW norms of various Tertiary rocks from the Idaho Springs and Central City areas__ 19. Chemical compositions...THE EMPIRE QUADRANGLE, GRAND, GILPIN,, AND CLEAR CREEK COUNTIES, COLORADO " By WILLIAM ABSTRACT The...Continental Divide and includes portions of Grand, Gilpin, and Clear Creek Counties. The quadrangle is on |  | | Report (issue) | | Washington Zinc ore, Friedensville, Pa. Banded iron-formation, Palmer, Mich. 6. Ribbon asbestos ore, Quebec...Peninsula, Mich. 10. Porphyry molybdenum ore, Colorado 11. Zinc ore, Edwards, N.Y. 12. Manganese nodules...ocean floor 13. Botryoidal fluorite ore, Poncha Springs, Colo. 14. Tungsten ore, North Carolina Rutile...Gneiss and Related Rocks, East-Central Front Range, Colorado By SHERMAN P. MARSH and DOU1GLAS M. SHERIDAN GEOLOGY...and geochemical study of rutile-bearing rocks in Colorado and a description of their occurrence elsewhere |  | | Book | | mid-1957, of vvhich 70% is in New Mexico, 16% in Colorado, Utah, and Arizona, and 8% in Wyo1ning. These...siliceous and Ruoritic types, and the oxidized Colorado Plateau deposits are desc1ibed vvith those that...origin, e.g., Blind River, \i\litwatersrand, and Colorado Plateau. The writer has attempted to present equitably.... . . . . . . . . . . . . . . . . . . . . . . Colorado Plateau . . . . . . . . . . . . . . . . . . ..... . . . . . . . . . . . . . . . . . . . . . . Colorado . . . . . . . . . . . . . . . . . . . . . . . |  | | Report (volume) | | Division of Mines Special Reports _.......__ ________ Colorado Mining Association publications . Economic Geology...the areas and subjects are listed under States, "Colorado Plateau," "United States," or under a few subject...Director's Office, Idaho Bureau of Mines and Geology, University of Idaho, Moscow, Idaho IND Department of...Institute San Diego, San Diego Public Library COLORADO Denver, Denver Public Library CONNECTICUT New...NORTH CAROLINA Charlotte, Charlotte and Mecklenburg County Public Library Durham, Duke University Library |
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