 | | Report (volume) | | Geology of the Eldorado Springs Quadrangle Boulder and Jefferson , Counties, Colorado C_-J / By JOHN...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...GEOLOGY GEOLOGY OF THE ELDORADO SPRINGS QUADRANGLE BOULDER AND JEFFERSON COUNTIES, COLORADO By JOHN D. WELLS...WELLS ABSTRACT The Eldorado Springs quadrangle lies across the eastern margin of the Front Range immediately |  | | Report (issue) | | Sequence Along Coal Creek to Idaho Springs Formation Front Range, Colorado By JOHN D. WELLS, DOUGLAS M. SHERIDAN...FIGUBE 1. Index maps of the Coal Creek area, Eldorado Springs, Ralston Buttes, and Blackhawk quadrangles...Photomicrographs showing folded alinements in andalusite and cordierite. 12 4. Triangular diagram of Boulder...SEQUENCE ALONG COAL CREEK TO IDAHO SPRINGS FORMATION, FRONT RANGE, COLORADO By JOHN D. WELLS, DOUGLAS M. SHERIDAN...the high-grade metamorphic gneisses of the Idaho Springs Formation elsewhere in the Front Range. Accordingly |  | | Report (volume) | | the Western Part of the Morrison Quadrangle Jefferson County, Colorado GEOLOGICAL SURVEY BULLETIN 1251-E...the Western Part of the Morrison Quadrangle Jefferson County, Colorado By D. J. GABLE CONTRIBUTIONS TO...rocks along the mountain front due west of Denver, Colorado UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON...pocket 1. Index map showing location of Morrison quadrangle.__. E3 2. Triangular diagram showing composition...diagrams of lineations in 4. Northern part of quadrangle. ______________. 37 5. Southern part of quad |  | | 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....................................... ..... . Andalusite ...............................................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 ............... ................. .......... |  | 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..._____________________________ _ 61 61 63 66 68 Idaho Springs-Ralston shear zone ___________ _ Structural features...deformed Boulder Creek Granodiorite from the Idaho Springs-Ralston shear zone ___________________________...DEPOSITS OF THE RALSTON BUTTES DISTRICT, JEFFERSON COUNTY, COLORADO By DouGLAS M. SHERIDAN, CHARLES ARDEN...Buttes uranium mining district in Jefferson County is the richest in Colorado east of the Continental Divide |  | | Report (issue) | | METAMORPHIC ROCKS OF THE CENTRAL FRONT RANGE. COLORADO By Dolores J. Gable ' Edited bv William. D............................................. 21 ANDALUSITE................................................35 EARLY PROTEROZOIC PALEOGEOGRAPHY OF NORTHERN COLORADO........................ 3 6 REGIONAL STRUCTURE...Records Section, Denver Federal Center, Denver, Colorado] Page Plate 1. Geologic map of the Proterozoic...Range, Colorado ......... in pocket 2. Sample locality map of the central Front Range, Colorado...... |  | | Report (issue) | | Basement in Colorado GEOLOGIC A I, Rock Units of the Precambrian Basement in Colorado By OGDEN TWETO...TWETO GEOLOGY OF THE PRECAMBRIAN BASEMENT IN COLORADO U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 1321-A...igneous rocks in outcrop and the buried basement in Colorado UNITED STATES GOVERNMENT PRINTING OFFICE...1912-1983 Rock units of the Precambrian basement in Colorado. (Geological Survey Professional Paper ; 1321-A)...Geology, Stratigraphic Pre-Cambrian. 2. Geology Colorado. QE653.T9 1986 551.7'1'09788 I. Title. For sale |  | | Report (issue) | | in the Big Narrows Area, northern Front Range, Colorado 3y Jeffrey T. Abbott Open-file report 1970 70-1...in the Big Narrows Area, northern Front Range, Colorado E&r Jeffrey T. Abbott U.S. Geological Survey,...quadrangles located in the northern Front Range of Colorado are Precambrian metasedimentary and metaigneous...Microcline-sillimanite-muscovite assemblages. ....... 120 Andalusite-sillimanite-cordiGrite assemblages. ...... 124...Poudre Park quadrangle and the eastern three quarters of the adjacent Big Narrows quadrangle in the northern |  | | Report (issue) | | Geology of the Empire Quadrangle Grand, Gilpin, and Clear Creek Counties ColOrado. By WILLIAM A. BRADDOCK...FIGVRE 1. Geologic map and sections of the Empire quadrangle _________________________________________________...Index map of Tertiary igneous rocks in the Empire quadrangle, Grand, Gilpin, and Clear Creek Counties, Colo...4. Index map showing location of the Empire quadrangle and the areas covered by other published geologic...norms of various Tertiary rocks from the Idaho Springs and Central City areas__ 19. Chemical compositions |  | | Report (issue) | | 1965. 1966. 1967. 1968. Numerous Federal, State, county, and local agencies and other organizations and...-___ California. _ __________________________ Colorado ______________________________ Montana. _____...Mountains_--_-------------- A41 Precambrian rocks of Colorado.__________ 41 41 Mesozoic stratigraphy.__________________...Dakota___________--------------75 Utah-..-.__-. -77 Colorado-____ ___________-.----77 Kansas.--.__.______-_-_...cooperators________-____________________ State, county, and local cooperators_____________ Other cooperators |  | | Report (volume) | | Notes. Colorado School Mines Mineral Industries Bull. Industries Bulletin. Golden, Colo. Colorado School...Florida State University. Colorado School of Mines Mineral Quarterly of the Colorado School of Mines. Golden...AMERICAN GEOLOGY, 1967 Colorado Univ. Studies Ser. Earth Sci.- University of Colorado Studies, Series in...Science. Boulder, Colo. Colorado-Wyoming Acad. Sci. Jour. - Journal of the Colorado-Wyoming Academy of Science...Science. Colorado State University. Fort Collins, Colo. Compass- The Compass of Sigma Gamma Epsilon. Provo |  | | Report (issue) | | listed on pages A263-A268. Numerous Federal, State, county, and municipal agencies and other organizations...Southern Rocky Mountains and plains___________ Colorado..._ _______________________________ New Mexic...Mexico______________________________ Colorado Plateau _______________________________ Colorado.. _________________________________...77 77 78 78 79 80 81 81 81 83 84 84 Continued Colorado Plateau Continued Utah_-__ _____________-_ Ariz...cooperators-____-_______-__-___-__-__-__ State, county, and municipal cooperators---------Other cooperators |  | | Report (issue) | | A293-A298 of this chapter. Numerous Federal, State, county, 1and local agencies and other organizations and...-----------Arizona _______________________________ _ Colorado _______ --_-------------··------ v A35 35 36...cooperators ____________________________ _ 251 State, county, and local cooperators ______________ _ 251 Other...ILLUSTRATIONS Page FIGURE 1. Published geologic quadrangle maps of ]{entucky as of May 1, 1970---------...water resources__ 5. Status of 77~- and 15-minute quadrangle mapping_______________________________________________________ |  | | Report (issue) | | financially in part by, the numerous Federal, State, County and City agencies listed on pages A133 to A136...____ Beryllium deposits in the Tarryall area, Colorado ____________________________ Beryllium deposits...istrict and regional studies_______---_--_-__ Colorado Plateau.________-------------_ Shirley Basin,...Washington. _______ Thorium veins in the Wet Mountains, Colorado _____-_____--_-------------Uranothorite in the...hydrologic data for large regions___--_Thermal springs of the world-________________ Ground water in the |  | | Report (issue) | | 501. During fiscal 1963, numerous Federal, State, County, or Municipal agencies listed on page A247 have..._____ Utah.. _--_______-__-_______--_______._ Colorado ______________________________ Kansas -_--___...Southern Rocky Mountains and plains ___________ Colorado Plateau_-_____--__-____-____--_-_-_-_ Basin and...___________________________ Geochemistry of hot springs and thermal 107 107 107 108 108 109 109 109 109..._. Federal agencies.___________________ State, county, and municipal agencies. 247 247 247 U.S. Geological |  | | Report (volume) | | 147 N., R. 84 W., 4 km N of Riverdale, McLean County, N. Oak. Named for Aggie Brown Coulee, which flows...NW1/4NW1/4SW1/4SW1/4 sec. 17, T. 85 N., R. 7 W., Linn County, Iowa. A-L Peak Rhyolite Oligocene 1. New Mexico...structures in the San Mateo Mountains, Socorro County, New Mexico: New Mexico Geol. Soc. Spec. Pub. 5...Mountains, 10. sees. 33-35, T. 4 S., R. 6 W., Socorro County, N.Mex. Anapra Sandstone 1. Early Cretaceous 2...6. 7. 9. 10. at Cerro de Cristo Rey, Dofta Ana County, New Mexico, Appendix 2 in Lovejoy, E. M. P., Geology |  | | Report (issue) | | listed on pages A253A258. Numerous Federal, State, county, and municipal agencies listed on pages A205-A210...---34 Utah --------------------------------35 Colorado ----------------------------35 lCansas ------..._ Quaternary geology ______________________ _ Colorado Plateau -----------------------------Geologic...agencies ------------------------------ 205 State, county, and municipal agencies __________ _ 205 U.S. Geological...--------- 130 Progress of 71h- and 15-minute quadrangle topographic mapping______________________________________ |  | | Book | | University of Southern California, Los Angeles, CA 90089, USA. P. JONATHAN PATCHETT Department of Geosciences,.... . . . . . . . . . . . . . . . . . . . Idaho Springs-Black Canyon assemblage . . . . . . . . . . . ... represent continental-margin arcs. The Idaho Springs-Black Canyon (1740-1720 Ma) in which rocks which...high-Mg and komatiitic volcanics, Gunnison County, Colorado. Geol. Assoc. Can., Abstracts with Programs...of early Proterozoic amphibolites, west-central Colorado, U.S.A. Chem. Geol., 67: 209-225. Kontinen, A |
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