 | | 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........................................... Wall Mountain Tuff .......................................................................................... Tuff of Stirrup Ranch .................................Badger Creek Tuff ....................................................... East Gulch Tuff ........... |  | | 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...largest of which is the Thirtynine Mile volcanic area (previously known as the Thirtynine Mile volcanic...of 83 singleĀcrystal laserĀfusion analyses of sanidine, 45 resistanceĀ furnace stepĀheating analyses |  | | Report (issue) | | parts of Chaffee, Park, and Fremont Counties, Colorado By Kendel1 A. Dickinson and Francis Allan Hills.................................2 Wal1 Mountai n Tuff....................................................7 Tuff of Stirrup Ranch....................................................14 Badger Creek Tuff and..............18 Gribbles Park Tuff, Thorn Ranch Tuff, and East Gulch Tuff................22 Summary and...thorium in the Wall Mountain Tuff........9 Fig. 3. Sample localities of Wall Mountain Tuff............ |  | | Journal (issue) | | Colorado Springs Mineralogical Society THE BULLETIN OF THE COLORADO SPRINGS MINERALOGICAL SOCIETY Published...Upcoming Events 1-5 Article - S. Veatch, The Castle Rock Quarries: A Building Stone Bonanza, part 1 of...personalities. Steven Veatch is a member of the Colorado Springs Mineralogical Society, the Lake George... the CaƱon City Geology Club, Grand Traverse Area Rock and Mineral Club, and the Central Michigan Lapidary...the Benzie Area Historical Society and Museum. He spends time at his cabin near Divide Colorado and on the |  | | Report (issue) | | Tallahassee Creek uranium district, Fremont County, Colorado by Kendell A. Dickinson Open-File Report...Location map of the Tallahassee Creek uranium area, Fremont County Colo................................4 2...Generalized geologic map of the Tallahassee Creek area showing uranium deposits and locations of cross...Tallahassee Creek Uranium District, Fremont County, Colorado by K. A. Dickinson Abstract Two important...Tallahassee Creek uranium district, Fremont County, Colorado. They are the Hansen orebody, which contains |  | | Journal (article/letter/editorial) | | Princeton magmatic center, located in central Colorado, consists of the epizonal Mount Princeton batholith...eruption of magma. The Wall Mountain Tuff erupted from a source in the same geographic area as the Mount Princeton...Princeton batholith at 37.3 Ma (Ar/Ar sanidine), but no structural evidence of a caldera or Communicated...Carolina at Chapel Hill, Chapel Hill, NC 27599-3315, USA Present Address: R. D. Mills (&) Astromaterials Research...Science Directorate, NASA-JSC, Houston, TX 77058, USA e-mail: ryan.d.mills@nasa.gov temporally associated |  | | Report (issue) | | and Quaternary Volcanic Ash of the Wet Mountain Valley, Colorado GEOLOGICAL SURVEY PROFESSIONAL PAPER...and Quaternary Volcanic Ash of the Wet Mountain Valley, Colorado By GLENN R. SCOTT and RICHARD B. TAYLOR...volcanic rocks along a graben in south-central Colorado UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON...and Quaternary volcanic ash of the Wet Mountain Valley, Colorado. (Geological Survey Professional Paper...16:868 1. Petrology-Colorado-Wet Mountain Valley. 2. Volcanism-Colorado-Wet Mountain Valley. 3. Geology |  | | Report (issue) | | the Rocky Mountain Section meeting of The Geological Society of America Boulder, Colorado, 1973 Edited...SOCIETY OF AMERICA, INC. 3300 Penrose Place Boulder, Colorado 80301 24 AUG 1990 The Memoir series was originally...northwestern Colorado and its implications concerning tectonism and the origin of the Colorado River system...Cenozoic sedimentation and deformation in northern Colorado and AGIOS ATCAGws jaceeet ty pes wien ano os Kar...helt 249 Neogene tectonism in south-central Colorado... a 2) 7 min 4 am ie a - =a, geek @a |  | 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...Cross, Iddings, Pirsson, and Washington (igneous rock classification system) Square centimeters Grams |  | | Report (issue) | | Resource Program Center P.O. Box 25287 Denver, Colorado 80225 March 2006 U.S. Department of the Interior...NPS/NRPC/GRD/NRRā2006/009. National Park Service, Denver, Colorado. NPS D-37, March 2006 Table of Contents List............15 Figure 5. Regional Map of Central Colorado. ...............................................for Florissant Fossil Beds National Monument in Colorado. It contains information relevant to resource...streams, and past and present mining activity in the area. The following geologic issues may warrant attention |  | | Journal (article/letter/editorial) | | XI-3, NASA-Johnson Space Center, Houston, TX 77058, USA b Department of Geological Sciences, University of...Carolina at Chapel Hill, Chapel Hill, NC 27599, USA c Department of Earth and Planetary Sciences, Center...Geochemistry, University of California, Berkeley, CA 94720, USA a r t i c l e i n f o Article history: Received...the Fish Canyon Tuff (FCT) of the southern Rocky Mountain volcanic ļ¬eld (SRMVF), USA. Their isotope geochemistry...associated with the beginning of Rio Grande rifting in Colorado indicate that felsic melts were generated from |  | | Report (volume) | | Volcanic Center, Chaffee and Gunnison Counties, Colorado By PRIESTLEY TOULMIN Ill and JANE M. HAMMARSTROM...volcanic center, Chaffee and Gunnison counties, Colorado. Ā· (U.S. Geological Survey bulletin ; 1864) Bibliography:...ash, tuff, etc. -Colorado-Chaffee County. 2. Volcanic ash, tuff, etc.-Colorado-Gunnison County. 3. V...Volcanism-Colorado-Chaffee County. 4. Volcanism-Colorado-Gunnison County. 5. GeologyColorado-Chaffee County...County. 6. Geology-Colorado-Gunnison County. I. Hammarstrom, Jane Marie. II. Title. Ill. Series. QE75 |  | | Report (volume) | | Early, Hiddle, and Late, and for epochs. Informal rock "terms--lower, middle, and tWer--nuy be used where...definition of the unit in a type section, locality, or area; distinguishing characteristics; definition of boundaries...first, followed, in parentheses, by the geographic area of the State in which the type locality occurs....STATES 4. Litho logy--A brief statement of principal rock types found in the unit. 5. Color--The main colors...to younger. if 10. Type section, locality, or area--G-iven as described by the author. The geographic |  | | Report (issue) | | younger h1gh-s1Uca rhyoMtes and granites from Colorado and north-central New Mexico by 1X Celia H....analyses for each major group code .......... 7 2* Rock names and codes ................ 28 3. Mineral...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...consisting of descriptive and chemical data for 507 rock specimens for which major constituent chemical analyses |  | | 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 (chapter) | | āflareĀupā began from TransĀPecos Texas to central Colorado concurrently with a change in mafic volcanism... 25.1ā23.3) from TransĀPecos Texas to central Colorado, a disĀ tance of 1,100 km. Two regional gaps (31...the Great Basin, minor clockwise rotation of the Colorado Plateau, and increased spreading along the Rio...structural grain. The Santa Rita lineament and Colorado Mineral Belt were magmatically active from 75...the Great Basin and clockwise rotation of the Colorado Plateau. Continuation of Jemez volcanism across |  | | Report (issue) | | flanks of the northern and central Rio Grande rift, Colorado and New Mexico Shari A. Kelley1 , Charles E....map for Mt. Princeton batholith, Sawatch Range, Colorado 10 4āAge versus elevation plot from Mt. Princeton...6āSample location map for Sangre de Cristo Mountains, Colorado 13 7āAge versus elevation plots for Sangre de...Range, Colorado 12 4āApatite fission-track ages and lengths, Sangre de Cristo Mountains, Colorado 16 5āApatite...and central Rio Grande rift of New Mexico and Colorado indicate that rocks now exposed in the eastern |  | Raynolds, Robert G.H., Johnson, Kirk R., Arnold, L. Rick, Farnham, Timothy M., Fleming, R. Farley, Hicks, Jason F., Kelley, Shari A., Lapey, Laura A., Nichols, Douglas J., Obradovich, John D., Wilson, Michael D. (2001) The Kiowa core, a continuous drill core through the Denver Basin bedrock aquifers at Kiowa, Elbert County, Colorado. Open-File Report 2001-185. US Geological Survey doi:10.3133/ofr01185 | Report (issue) | | Denver Basin Bedrock Aquifers at Kiowa, Elbert County, Colorado by Robert G. H. Reynolds1 , Kirk R. Johnson1...F. Hicks1 , Shari A. Kelley3, Laura A. Lapey4, Douglas J. Nichols2, John D. Obradovich2, and Michael D...New Mexico Institute of Mining and Technology Colorado State University Report prepared in cooperation...NATIONAL SCIENCE FOUNDATION U.S. GEOLOGICAL SURVEY COLORADO DEPARTMENT OF NATURAL RESOURCES, DIVISION OF WATER...OF THE STATE ENGINEER COLORADO GEOLOGICAL SURVEY ELBERT COUNTY, COLORADO COLORADO STATE UNIVERSITY UNIVERSITY |  | | Report (issue) | | Petroleum Geologists ABAC. ______ .Association of Bay Area Governments ac... ________ . _ . ________alternating......... __ . _ . __ ... ______ ............barn (area) EDC.._..................__................EROS..... ___ .Central Treaty Organization CFRUC _ ..Colorado Front Range Urban Corridor Project cfs. _ ......kilobar KCLA...._______....___Known Coal Leasing Area KeV.___._.._....____....____kiloelectronvolt kg...kilogram KGRA._______Known Geothermal Resources Area KGS.__.___________Known Geologic Structure kHz___ |  | | Report (volume) | | Petroleum Geologists ABAC. ______ .Association of Bay Area Governments ac... ________ . _ . ________alternating......... __ . _ . __ ... ______ ............barn (area) EDC.._..................__................EROS..... ___ .Central Treaty Organization CFRUC _ ..Colorado Front Range Urban Corridor Project cfs. _ ......kilobar KCLA...._______....___Known Coal Leasing Area KeV.___._.._....____....____kiloelectronvolt kg...kilogram KGRA._______Known Geothermal Resources Area KGS.__.___________Known Geologic Structure kHz___ |  | | Report (issue) | | _____________________ Arkansas____________________________ Colorado ____________________________ Kansas__________...____________________ Geophysics_____________________________ Rock magnetism ____ Geomagnetism _____ Petrophysics _______...Engineering geologic mapping ____________ Research in rock mechanics ___________. Research in geologic hazards...Index map of the conterminous United States showing area! subdivisions used in the discussion of water resources...Petroleum Geologists ABAC ______Association of Bay Area Governments ac ___________________alternating current |  | | Report (volume) | | _____________________ Arkansas____________________________ Colorado ____________________________ Kansas__________...____________________ Geophysics_____________________________ Rock magnetism ____ Geomagnetism _____ Petrophysics _______...Engineering geologic mapping ____________ Research in rock mechanics ___________. Research in geologic hazards...Index map of the conterminous United States showing area! subdivisions used in the discussion of water resources...Petroleum Geologists ABAC ______Association of Bay Area Governments ac ___________________alternating current |  | | Report (issue) | | Morrison Formation, Grants uranium region, New Mexico, USA ...................................................Cretaceous ages, USA; (2) the Salt Wash Member, Morrison Formation, Colorado Plateau, USA; (3) Tertiary...Tertiary Sandstones of the Wyoming basins, USA; (4) Miocene basal deposits, British Columbia, Canada; and (5)... Finch and James F. Davis Editors, Denver, Colorado, USA May, 1984 PARTI GENERAL GEOLOGY SANDSTONE-TYPE...US Geological Survey, Denver, Colorado J.F. DAVIS Lakewood, Colorado United States of America Overview |
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