 | | Report (issue) | | Mineral Deposits of the Poncha Springs NE Quadrangle, Chaffee County,Colorado By RALPH E. VAN ALSTINE... PAPER 626 Prepared in cooperation with the Colorado State Mining Industrial Development Board UNITED...Ralph E. Van Alstine and Doak C. Cox _________ _ Colorado-American mine ______________ -_Delay adit and...Geologic map of the Poncha Springs NE quadrangle. Geologic map of the Colorado-American fluorspar mine...district. Geologic map of underground workings, Colorado-American fluorspar mine. Longitudinal section |  | | Report (issue) | | Mineral Deposits of the Poncha Springs SE Quadrangle, Chaffee County, Colorado GEOLOGICAL SURVEY Work...Work done in cooperation with the Colorado State Mining Industrial Development Board PROFESSIONAL PAPER...Mineral Deposits of the Poncha Springs SE Quadrangle, Chaffee County, Colorado By RALPH E. VAN ALSTINE...PROFESSIONAL PAPER 829 Work done in cooperation with the Colorado State Mining Industrial Development Board Description...the Poncha Springs SE quadrangle, Colorado Page .In pocket Index map of south-central Colorado ______ |  | | Report (volume) | | of the Thirtynine Mile Volcanic Field, Central Colorado GEOLOGICAL SLRVEY BULLETIN 1395-C IĀ§ ' Stratigraphic...of the Thirtynine Mile Volcanic Field, Central Colorado By RUDY C. EPIS and CHARLES E. CHAPIN CONTRIBUTIONS...OF THE THIRTYNINE MILE VOLCANIC FIELD, CENTRAL COLORADO By RUDY C. EPIS l and CHARLES E. CHAPIN 2 ABSTRACT...physiographic and tectonic settings in central Colorado. The volcanic field is characterized by andesitic...used informal names in our earlier reports for 1 Colorado School of Mines, Golden, Colo. 80401, and U.S |  | | Report (volume) | | the Browns Canyon Wilderness Study Area, Chaffee County, Colorado U.S. GEOLOGICAL SURVEY BULLETIN 1716-C...the San Isabel National Forest, south-central Colorado: U.S. Geological Survey Bulletin 1638, p. 40-42...SOUTH-CENTRAL COLORADO Mineral Resources of the Browns Canyon Wilderness Study Area, Chaffee County, Colorado...Area, Chaffee County, Colorado. (Mineral resources of wilderness study areas South-Central Colorado; ch...Mines and mineral resources Colorado Browns Canyon Wilderness. 2. Geology Colorado Browns Canyon Wilderness |  | | Report (issue) | | (40 AAz./ vs 40K/3bAr) measured in samples of sanidine, plagioclase, biotite, and glass separated from...beds at Blind Spring Hill south of Benton Hot Springs, Calif., record episodes of pyroclastic volcanism...tephra near the Cowan mine south of Benton Hot Springs, Calif., records a pyroclastic volcanic event that... Mineralogically the they all contain quartz, sanidine, oligoclase, biotite, allanite, zircon, apatite...the Bishop Tuff were made. The weighted mean of sanidine, plagioclase, and biotite ages from the lower |  | | Report (chapter) | | BULLETIN 160, 2004 205 Geochronology of the central Colorado volcanic field William C. McIntosh and Charles...Technology, Socorro, NM 87801 Abstract The central Colorado volcanic field (CCVF) consists of at least ten...volcanic field to the southwest, and overĀ lapped the Colorado Mineral Belt on the north and west. The CCVF was...of 83 singleĀcrystal laserĀfusion analyses of sanidine, 45 resistanceĀ furnace stepĀheating analyses...about 30 and 29 Ma. Introduction The central Colorado volcanic field (CCVF) is defined as the middle |  | | Report (volume) | | (4Ā°Ar/ 36Ar vs 40K/ 36Ar) measured in samples of sanidine, plagioclase, biotite, and glass 23 7. Diagram...mine 26 10. Abandoned pumice mine near Benton Hot Springs, Calif. 27 11. Roadcut along the Owens River 31...volcanic field are similar: they contain quartz, sanidine, oligoclase, biotite, allanite, zircon, titanomagnetite...the Bishop Tuff were made. The weighted mean of sanidine, plagioclase, and biotite ages from the lower...Bishop is 0.738Ā± 0.003 m.y. The weighted mean of sanidine, plagioclase, biotite, and glass ages from the |  | | Report (volume) | | the Mount Aetna Volcanic Center, Chaffee and Gunnison Counties, Colorado By PRIESTLEY TOULMIN Ill and JANE...the Mount Aetna volcanic center, Chaffee and Gunnison counties, Colorado. Ā· (U.S. Geological Survey bulletin...tuff, etc. -Colorado-Chaffee County. 2. Volcanic ash, tuff, etc.-Colorado-Gunnison County. 3. Volcanism-Colorado-Chaffee...Volcanism-Colorado-Chaffee County. 4. Volcanism-Colorado-Gunnison County. 5. GeologyColorado-Chaffee County. 6...6. Geology-Colorado-Gunnison County. I. Hammarstrom, Jane Marie. II. Title. Ill. Series. QE75.B9 no. |  | | Book (edition) | | ā _ ; COLORADO GEM TRAILS AND MINERAL GUIDE ! ā : ' BOOKS BY RICHARD M. PEARL Colorado Gem Trails...Trails and Mineral Guide Colorado Rocks, Minerals, Fossils Americaās Mountain: Pikes Peak and the Pikes...Nature As Sculptor: A Geologic Interpretation of Colorado Scenery Guide to Geologic Literature Popular Gemology...Gemology Mineral Collectors Handbook Colorado Gem Trails The Art of Gem Cutting (With Dr. H. C. Dake)...Dake) * RICHARD M. PEARL ā
COLORADO GEM TRAILS AND MINERAL GUIDE ā
SKETCH MAPS BY MIGNON WARDELL PEARL |  | | Book (edition) | | MILEAGE L OGS. REVISED EDITION Revised Edition, COLORADO GEM TRAILS AND MINERAL GUIDE HICllAHD :--1. PEARL...an extensive Ā„em and mineral collecting tour 01 Colorado, revealing the interesting places where Nature...Swallow, Publisher) 2679 South York Street Denver, Colorado 80210 - , =Ā· - Ā·, BOOKS BY RICHARD M. PEARL...PEARL Exploring Rocks, Minerals, Fossils in Colorado America's Mountain: Pikes Peak and the Pikes Peak...Atlas of Colorado American Gem Trails Nature As Sculptor: A Geologic Interpretation of Colorado . Scenery |  | | Book | | MINES AND MINERALS OF THE GREAT AMERICAN RIFT (COLORADO-NEW MEXICO) Sine ā_ā< Ā¢ te om At _SHT 40...MINES AND MINERALS OF THE GREAT AMERICAN RIFT (COLORADO-NEW MEXICO) Richard Walker Holmes and Marrianna...Mines and minerals of the Great American Rift (Colorado-New Mexico). Bibliography: p. Includes index...index. 1. Mines and mineral resourcesāColorado. 2. Mines and mineral resourcesāNew Mexico. I. Kennedy, Marrianna...minerals of the Great American Rift in New Mexico and Colorado. Great American Rift is the name we use for a |  | | Report (volume) | | surface exposures high in the San juan Mountains of Colorado (about 3,470 m above sea level), from a north-facing...minerals: biotite, hornblende, plagiolase, and sanidine. A least-squares analysis of the K-Ar and fission-track...1972, Geologic map of the Benton quadrangle, Mono County, Camornia, and Esmeralda and Mineral Counties,...history of the Lunar Lake caldera of northern Nye County, Nevada: U.S. Geological Survey journal of Research...a new Pleistocene interglaical fauna from Meade County, Kansas: Kansas University Science Bulletin 38 |  | Peterman, Z.E., Bunker, C.M., Bush, C.A., Bryant, Bruce, Marvin, R.F., Naeser, C.W., Mehnert, H.H., Izett, G.A., Obradovich, J.D., Cebula, G.T. (1981) Shorter contributions to isotope research in the Western United States, 1980. Professional Paper 1199ae. US Geological Survey doi:10.3133/pp1199ae | Report (issue) | | Igneous Rocks in the South Park-Breckenridge Region, Colorado, and their Relation to the Tectonic History of...Dating of the Climax and Gold Meadows Stocks, Nye County, Nevada By C. W. NAESER and FLORIAN MALDONADO ...igneous rocks in the South Park-Breckenridge region, Colorado, and their relation to the tectonic history of...dating of the Climax and Gold Meadows stocks, Nye County, Nevada, by C. W. Naeser and Florian Maldonado...anomaly is more or less coincident with part of the Colorado lineament described by Warner (1978). Warner presents |  | 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 (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 (issue) | | younger h1gh-s1Uca rhyoMtes and granites from Colorado and north-central New Mexico by 1X Celia H....younger high-silica rhyolites and granites from Colorado and north-central New Wexico Celia H. Steigerwald*...younger high-silica rhyolites and granites from Colorado and north-central Ney Mexico* The data were compiled...the many granite molybdenite system prospects in Colorado* We then decided to broaden the data bank to include...younger high-silica rhyolites and granites in Colorado for which chemical data were available* Our aim |  | | Report (issue) | | INTRUSIVE ROCKS OF COLORADO By Edward J. Young Prepared in cooperation with The Colorado Mining Industrial...Industrial Development Board and the Colorado Geological Survey This report is preliminary and has not been...intrusive rocks of Colorado Ā» Ā» Ā» *Ā«Ā» In pocket Laramide-Tertiary intrusive rocks of Colorado By Edward...Laramide-Tertiary intrusive rocks in the State of Colorado, geologic age localities, mining districts, localities...This information is shown on the State map of Colorado (scale 1:500,000) accompanying this report. In |  | | Report (issue) | | the major product (as at Climax and Henderson, Colorado, and Questa, New Mexico), or is a co- or byproduct...XVT XVA XWA XWI XWY ALASKA ARIZONA CALIFORNIA COLORADO GEORGIA IDAHO MAINE MISSOURI MONTANA NEVADA NEW...of the Pine Grove-B la*n Mountain area. Beaver County, Utah: U. S. Geological Survey Open-File Report...molybdenum system, southern wah wah Mountains, Beaver County, Utah (abstract): American Institute of Mining...Beryllium deposits of the Mount Antero region, Chaffee County, Colorado: U.S. Geological Survey Bulletin 982-D |  | | Report (issue) | | Peninsula, Mich. 10. Porphyry molybdenum ore, Colorado 11. Zinc ore, Edward, N. Y. 12. Manganese nodules... ocean floor 13. Botryoidal fluorite ore, Poncha Springs, Colo. 14. Tungsten ore. North Carolina Geology...an oval-shaped body of intrusive rock in Crook County, Wyo. This area makes up the higher part of the...Hulett Sandstone, Stockade Beaver Shale, and Canyon Springs Sandstone Members | ā -M" ā Mottled limestone...members, which from oldest to youngest are: Canyon Springs Sandstone, Stockade Beaver Shale, Hulett Sandstone |  | | Book (volume) | | SOUTHWESTERN QUADRANT Arizona, Arkansas, California, Colorado, Louisiana, Nevada, New Mexico, Oklahoma, Texas...Southwestern Quadrant Arizoni, Arkansas, California, Colorado, Louisicna, Nevada, New Mexico, Oklahoma, Texas...Location Numbers Arizona Arkansas California Colorado 258 Louis B30 ana HOW TO USE THIS BOOK...volumes, through very precise directions and accurate county maps, to get you to the best and most accessible...for the county in which it is located. This site number also appears under the given county in the text |  | | Report (issue) | | Extensive zeolitization associated with hot springs in central Colorado, by W. N. Sharp____________________________...in the Tertiary San Luis-Upper Arkansas graben, Colorado, by R. E. Van Alstine_____ 43 Geophysics Calculated...logs, Nevada Test Site and Hot Creek Valley, Nyo County, Nev., by D. L. HealeY------------------------...studies of the Trinidad quadrangle, south-central Colorado, by M. D. Kleinkopf, D. L. Peterson, and R. B...Whole-rock Rb-Sr age of the Pikes Peak batholith, Colorado, by C. E. Hedge ______________ - __________ --- |  | | Report (volume) | | Geology of the Thomas Range Fluorspar District Juab County, Utah GEOLOGICAL SURVEY BULLETIN This report... Geology of the Thomas Range Fluorspar District Juab County, Utah By M. H. STAATZ and F. W. OSTERWALD GEOLOGICAL...1918Geology of the Thomas Range fluorspar district, Juab County, Utah, by M. H. Staatz and F. W. Osterwald. Washington... GEOLOGY "OF THE THOMAS RANGE FLUORSPAR DISTRICT, JUAB COUNTY, UTAH By M. H. STAATZ and F. W. OSTERWALD ABSTRACT...miles surrounding Spors Mountain in central .Tuab County, 46 miles northwest of Delta, Utah. From its discovery |  | | Report (volume) | | A. F. Rogers, Stanford University, Palo Alto. Colorado.........Prof. R. D. George, Boulder. Connecticut...See Bauxite and Hallpysite. Asbestos. Tallapoosa County, with corundum deposits near Dudleyville; not found...commercial quantity or quality. Asphalt. Colbert County, small quantity has been shipped from near Leighton;...following localities: Bibb County, Pratts Ferry; Calhoun County, near Tampa; Clay County, T. 20, Pv. 7 E.; Jefferson...Jefferson County, at Elyton; Lee County, at Chewacla lime works; St. Clair County, at Gfeensport; Shelby |  | | Report (issue) | | Tertiary intrusives, diorite to granite (central Colorado), without extremes** 592 200 to 2,700 50 to 1...Plume, central Colorado), without extremes** Granite, (mostly Pikes Peak, central Colorado), without extremes**...metamorphic Schists and gneisses (central Colorado, mostly Idaho Springs Formation), without extremes** Sedimentary...sandstone (āposthaliteā water), Paradox Basin, Grand County, Utah, United States 1 Sandstone and anhydrite...and Baker, 2008); at the Xianghuapu Mine in Linwu County, Hunan Province, China (Yuzhou, 1990); and at the |  | | Journal (issue) | | since it will be held at the giant Los Angeles County Fairgrounds in Pomona, letās just call it the āPomona...Section of Geological Society o f America: Boulder, Colorado, Geological Society o f America Centennial Field...section with serendibite near Johnsburg, Warren County, New York (Schaller and Hildebrand, 1955; Grew...Ridge, CO 80033 303-421-3646 (by appointment) Colorado & Worldwide Specimens Collectorās Stope Jim &...Manitou Springs, CO 80829-0413 719-685-4479 By appointment only. Our mines produce choice Colorado minerals |
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