| | Report (issue) | Geochemical Maps of Stream Sediments in Central Colorado, from New Mexico to Wyoming Open-File Report...Survey Cover: Overlooking North Fork Lake Creek and Colorado highway 82 east of Independence Pass, with... Geochemical Maps of Stream Sediments in Central Colorado, from New Mexico to Wyoming By Robert G. Eppinger...Geochemical maps of stream sediments in central Colorado, from New Mexico to Wyoming: U.S. Geological Survey.................. 1 Geologic Setting of Central Colorado.............................................. | | | Report (issue) | GUIDE FOR EXPLORATION IN THE MONTEZUMA DISTRICT, CENTRAL COLORADO By Theodore Botinelly Open-File Report...The Montezuma district of central Colorado is a small base metal-silver mining district containing vein...more productive mines. Introduction The Montezuma district is an area of base metal-silver vein deposits...other Tertiary stocks in the Colorado mineral belt and elsewhere. The district is roughly triangular in shape...The first discovery of silver in Colorado was in the Montezuma district at the Coley deposit on Glacier | | | Report (issue) | a hydrogeochemical survey of the Geneva Creek area, central Colorado By J.B. McHugh*, W.H. Ficklin*,...ILLUSTRATIONS Figure 1. Index map of the Geneva Creek area, central Colorado............. 2 Figure 2. Sample...Sample locality map of the Geneva Creek area, central Colorado... 3 TABLES Table 1. Analytical methods used...used for water analyses, Geneva Creek area, Colorado....................................................results for 32 water samples from the Geneva Creek area, Colorado..................................... | | | Report (issue) | General Geology of the Harold D. Roberts Tunnel, Colorado GEOLOGICAL SURVEY PROFESSIONAL PAPER 831-B General... General Geology of the Harold D. Roberts Tunnel, Colorado By CHARLES S. ROBINSON, LAWRENCE A. WARNER, and...ENGINEERING GEOLOGY OF THE HAROLD D. ROBERTS TUNNEL, COLORADO GEOLOGICAL SURVEY PROFESSIONAL PAPER 831-B......................................... Boulder Creek Granite........................................................................... B23 Montezuma Quartz Monzonite and associated aplitic rock......... | | | Report (issue) | Montezuma District of Central Colorado Molybdenite in the Montezuma District of Central Colorado By George...--····-----Distribution of molybdenite in the district....... SummarY-----·------·--·---------------...Index map of central and western Colorado, showing the Montezuma district in relation to the 2. 3. 4. 5... 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. Colorado mineral belt·-··----···----··-···------------...showing principal geologic elements of the Montezuma district... ---------····----···--·······--··--······-·--·· | | | Journal (article/letter/editorial) | at the junction of Deer Creek with the Snake River in Summit County, Colorado* P. K. THEOBALD Jr., H....D. B. HA~RINS~ U.S. Geological Survey, Denver, Colorado (Received 22 January 1962; revised 1 June 1962)...basin. The adjoining drainage to the west, Deer Creek, is underlain by basic rocks, from which the water...preciousmetal veins in the drainage basin of Deer Creek, it carries less metal than the Snake River. The...iron oxide quantities of the other metals. In Deer Creek manganese oxide is precipitated and large quantities | | | Journal (article/letter/editorial) | of COLORADO ED RAINES Geology Museum Colorado School of Mines 1310 Maple Street Golden, Colorado 80401...Figure 1. Camp Bird mine, level 2, Sneffels district, Ouray County. Raines-Pettem collection, photographer...photographer unknown. B etween 1868 and 1922, Colorado produced almost 260 million pounds of copper. Nearly 100...from the Leadville district, with another 50 million pounds mined in San Juan County (Henderson 1926).... During the twentieth century, the Gilman district surpassed Leadville in total copper production with | | | Report (issue) | mineralized rocks of the Montezuma mining district, central Colorado By George J. Neuerburg, Theodore Botinelly...information about the Montezuma mining district of central Colorado. It includes J_) localities of all...intrusives. Abbreviations are the following: "QM", quartz monzonite whose igneous texture is destroyed by...2-5): Type 1 Porphyritic biotite granodiorite quartz monzonite. Evenand medium-grained hypautomorphic... Type 2A Mortared porphyritic biotite granodiorite-quartz monzonite. Medium-grained hypautomorphic in an | | | Report (issue) | GEORGETOWN QlJADRANGLE (TOGETHER 'VITH THE EMPIRE DISTRICT) COLORADo· BY JOSIAH E. SPURR AND GEORGE H. GARREY...... _·_ .................................... . Quartz gneiss ...................................... _.......... : .................................. . Quartz monzonite gneiss (adamellite gneiss) ........................................ _....... __ ... . Quartz monzonite (adamellite) ... ~ ....................: .......................................... . Quartz-bearing diorite and associated hornblendite .. | | | Report (volume) | CHARLES D. WALCOTT, DIRECTOR A GAZE~?TEER OF COLORADO BY HEN.R Y GANNETT WASHINGTON GOVERNMENT PRINTING... _A GAZETTEER OF COLORADO. By HENRY ' GANNET,T. GENERAL DESCRIPTION. Colorado is_situated about midway...GAZETTEER OF COLORADO. through the Park Range on its way to join Green River, forming the Colorado. Middle...Mexico, the San Juan flo wing westward to the Colorado, and many branches of Gran9. and Gunnison rivers...plateau region is drained entirely by tributaries of Colorado River. The higher of these plateaus are well watered | | | 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...migmatization and granitization. (7) A body of Boulder Creek granodiorite was intruded into the northeast portion...Granitic rocks 1230 Migration of elements 1230 Boulder Creek granodiorite and Silver Plume granite 1233 Pegmatite...biotite in the A series.. . 10. Equal-area plot of quartz in the A series... 11. Equal-area plot of biotite | | | Report (issue) | IN COLORADO By Jerald F. McCain and John L. Ebling Open-File Report 79-1276 Lakewood, Colorado September...River, the Arkansas River, and the Colorado River basins of Colorado. ....................... In pocket...selected streams in the South Platte River basin of Colorado. ....................... II I 16 CONTENTS...River, the Arkansas River, and the Colorado River basins of Colorado. .......................... Selected...River, the Arkansas River, and the Colorado River basins of Colorado ....................... Maximum observed | | | 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...Quartzite at Coal Creek ________________ _ Igneous rocks _____________________________ _ Quartz monzonite gneiss...gneissic aplite ________ _ Quartz diorite and associated hornblendite_ Boulder Creek granite _________________..._____________________ _ Copper deposits in Jefferson County __ _ F. M.D. property _____________ _ Malachite | | Plumlee, Geoffrey S., Streufert, Randall K., Smith, Kathleen S., Smith, Steven M., Wallace, Alan R., Toth, Margo I., Nash, J. Thomas, Robinson, Rob A., Ficklin, Walter H., Lee, Gregory K. (1995) Map showing potential metal-mine drainage hazards in Colorado, based on mineral-deposit geology. Open-File Report Vol. 1995 (95-26) US Geological Survey doi:10.3133/ofr9526 | Report (issue) | Prepared by the U. S. Geological Survey and the Colorado Geological Survey in cooperation with the U. S...Northgate Elkhorn Hahn's Peak Lower Slavonia Bear Creek Riv er Elk Riv er F Us Manhattan Crystal ... V Allen's Park Us Akron Us Meeker Beaver Creek Troublesome 40° C White River ra o lo d Ward...rk Fulford Ri ve Frisco Evergreen Uv Uv Geneva Creek Gilman Hall's Gulch Tenmile - Breckenridge...Pulver Badger Flats Sou th P latt eR ive r Ar Rock Creek Unaweep Limon Fairplay S Champion er Riv F | | | Book (edition) | University-Kansas, QUARTZ Hawley-Gardner, Opbir-Burroughs, HILL anp NEVADAVILLE. Mercer County. ; ; California...ae American Hilae Ss POSEN 1% xiS LEA Colorado GOLD AND FARMS SILVER AND Peet tt Ae STOCK...HIS volume, as its name implies, is devoted to Colorado. tents are descriptive, statistical, and historical...compendium f useful and general information concerning Colorado, and trusts this book will meet the present requirements...EON hy OS ENTE sy a Towns and Cities of Colorado, alphabetically arranged............ Climate | | | Report (issue) | Series 30 Bibliography and Index of Colorado Geology, 1984-1989 Colorado Geological Survey Department of...Resources Denver, Colorado 1990 Information Series 30 Bibliography and Index of Colorado Geology, 1984-1989...Institute under contract to the Colorado Geological Survey Colorado Geological Survey Department of...of Natural Resources Denver, Colorado 1990 ii FOREWORD In recognition of the need to more effectively...published literature on the state's geology, the Colorado Geological Survey is pleased to release Information | | | Report (issue) | of the eastern half of the lone quadrangle, Nye County, Nevada. [Menlo Park, CA] : U.S. Geological Survey...of the Zwagg Island Wilderness Study Area, Currv County, Oregon. [Menlo Park, Calif.] : U.S. Geological...only Dean, Lewis S. Mineral resources of Clay County, Alabama. Geological Survey of Alabama, 1988. M(235)4...Un3e Higgins, Michael W. Geologic map of Cecil County. [Baltimore] : State of Maryland, Department of...inventory of Essa and Tosorontio townships, Simcoe County, southern Ontario. Toronto, Ontario : Ontario Ministry | | | Report (issue) | GEOLOGICAL SURVEY Locatable Mineral Reports for Colorado, South Dakota, and Wyoming provided to the U.S.............................................. 1 COLORADO ................................................(administered by White River National Forest) Slate Creek ..................................................Complete citations are provided on the figures.] COLORADO Gunnison and White River National Forests Mountain...Coronado Groups (USGS, 1997a)......... 46-49 Part of Colorado Springs - Castle Rock area (Trimble and Machette | | | Report (issue) | National Scenic Area, California. Summitville, Colorado, has been the focus of an intense effort to understand...San Juan Mountains and adjacent San Luis Valley, Colorado Historic mining camps of southeastern Arizona...and the formation of iron bogs, Rocky Mountains, Colorado 9:10 Solid Waste, U.S. Environmental Protection...southwestern edge of the Colorado Plateau Robert J. Kamilli (USGS), The Mogollon mining district-Results from mapping...alteration, and mineralization at the Orcopampa Ag-Au district, southern Peru EdDeWitt1, G. P. Landis1, R. E | | | Report (issue) | SOURCES FOR GROUND-WATER HYDROLOGY AND GEOLOGY OF COLORADO WEST OF THE CONTINENTAL DIVIDE By Edward R. Banta...in cooperation with the COLORADO WATER CONSERVATION BOARD Denver, Colorado 1992 U.S. DEPARTMENT OF...Copies of this report can be purchased from: District Chief U.S. Geological Survey Box 25046, Mail Stop...geologic data for wells and test holes in western Colorado- - ________ _ ____ 111 3 BIBLIOGRAPHY, INDEX...SOURCES FOR GROUND-WATER HYDROLOGY AND GEOLOGY OF COLORADO WEST OF THE CONTINENTAL DIVIDE By Edward R. Banta | | | Book | commercial ores and secondary minerals by state, county, township, and geologic range. For easy identification...cities, and many of today’s prosperous western county seats began as mining-boom camps. trating sand...Whether you such as those listed alphabetically by county, township, and range in Part II of this book. Where...the heart of the then most prolific metal-mining district of Central Europe. He had grown up with a boy’s...Subparallel Biotite, potash feld- Volcanic Absence of quartz Dark green to black color Texture flow amphibole | | Iwatsubo, Rick T., Nolan, K.M., Harden, D.R., Glysson, G.D. (1976) Redwood National Park studies; data release number 2, Redwood Creek, Humboldt County, and Mill Creek, Del Norte County, California, April 11, 1974-September 30, 1975. Open-File Report Vol. 1976 (76-678) US Geological Survey doi:10.3133/ofr76678 | Report (issue) | RELEASE NUMBER 2, REDWOOD CREEK, HUMBOLDT COUNTY, AND MILL CREEK, DEL NORTE COUNTY, CALIFORNIA, APRIL 11...Introduction -; Description of study area .; Redwood Creek Mill Creek Types of data collected Synoptic Data collected...Channel cross sections Erosional landforms Mill Creek drainage basin _ __ _ _ "3Q jo Water temperature...Sampling stations in Redwood Creek area 3. Sampling stations in Redwood Creek estuary area 4. Sampling stations...stations in Mill Creek area Diagram showing changes in stream channelMap showing erosional landforms | | | Journal (volume) | Province of Essex County, Mass. II. Henry - S. Washington ---------------- The Sweetland Creek Beds. J...----------------- Discussion and Correlation of Certain Colorado Formation. Editorial W. N. i 22 53 65 79... --- The Distribution of Loess II. of Essex County, Mass. III. Henry 105 Fossils. B. Granitic...E. Teller The Petrographical Province of Essex County, S. Mass. Reviews : 247 261 272 Henry IV...v VII PAGE Petrographical Province of Essex County, Mass. Henry S. Washington sion and Conclusions | | | Report (volume) | 2 27 30 Mining districts 2 Hayden Hill, Lassen County, Cal 2 30 30 Location and accessibility 2 History...Mining districts—Continued. Hayden Hill, Lassen County, Cal.—Continued. Ore deposits—Continued.2 Valuable...Origin of the shoots Milling High Grade district, Modoc County, Cal Location History of mining Accessibilty...glassy rhyolite Future of the district Winters district, Modoc County, Cal Location and accessibility...Page. South end of Pine Nut Mountains, Douglas County, Nev., including 51 Gardnerville, Red Canyon, and | | | Report (issue) | Carbonate-Hosted Sulfide Deposits of the Central Colorado Mineral Belt DAVID W . BEATY, GARY P . LANDIS...minor gale na and quartz. W hite dolomite fills some ,·ugs. Late narrow veinlets of quartz and marmatite...host-rock bedding. Black Cloud mine, Leadville district. Sherman-type ore (bottom) in paleokarst breccia...with ferroan dolomite. rv1oose mine, North Alma district. Photographs b)' \Villiarn Sacco, Peabody Museum...Carbonate-hosted sulfide deposits of the central Colorado mine ral belt: Introduction, general discussion |
|