 | | 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) | | Deposits of the Poncha Springs NE Quadrangle, Chaffee County,Colorado By RALPH E. VAN ALSTINE With a section... PAPER 626 Prepared in cooperation with the Colorado State Mining Industrial Development Board UNITED...Rhyolitic ash-flow tuff ______________________ _ Nathrop Volcanics _________________________ _ Browns Canyon...Ralph E. Van Alstine and Doak C. Cox _________ _ Colorado-American mine ______________ -_Delay adit and...----------Copper prospect _______________ -_----------Gold _____________________________________ _ 30 30 30 |  | | Journal (article/letter/editorial) | | Two Point claim, Pikes Peak batholith, Teller County. The Collectorās Edge specimen, Jeff Scovil photo...Mail Stop 150, Box 25046 Federal Center Denver, Colorado 80225 pmodreski@usgs.gov C olorado is, of course...minerals and mineral deposits, ranging from the gold and silver that first brought prospectors and other...been written as guides to mineral collecting in Colorado. A classic, which went through three major editions...1951 version with a slightly different title), is Colorado Gem Trails and Mineral Guide, by Pearl (1951, |  | | Report (volume) | | be changed by heat treatment or dyeing. Only the ruby, sapphire, spinel, emerald, rutile, and quartz of...or two of these qualities. The diamond, emerald, ruby, and sapphire are considered precious gems. Some...canary yellow in the diamond; pigeon-blood red in the ruby; cornflower blue in the sapphire; and grass green...price of a gem stone. Such gems as the diamond and ruby are rare, in addition to being beautiful and durable...the deep redpyrope garnet closely resembles the ruby in color, there is no comparison in expense and |  | | Journal (article/letter/editorial) | | more. "The Glove Mine is located in Santa Cruz County, Arizona, near the little town of Amado, on the... It is a lead mine and there is some silver and gold but not ROCKS AND MINERALS PLEASE SEND THEM I N...specimen with a pleasing combination of two minerals. COLORADO ā "I used to be a regular reader of R&M and a...spectacular, only good representative specimens of Colorado minerals. Half the fun is the trip anyway. No...consists solely of minerals I've found here in Colorado." ā letter dated Jan. 10, I960, from Doug Graham |  | | Journal (article/letter/editorial) | | Note: Gold in Rhyolite at Nathrop, Colorado Denver Nathrop # Pueblo COLORADO DAVID E. SEAMAN 36...Winter Street Norway, Maine 04268 Ruby Mountain at Nathrop, Colorado, has been noted for many years as...while a gradĀ uate student at the University of Colorado in 1932. That was the year of my first collecting...Arizona, New Mexico, and returning once again to the Nathrop, ColoĀ rado site. We collected garnets and topaz...sunlight, one of them suddenly produced tiny bright gold-yellow reflections, which had been invisible to |  | | 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...Exploring Rocks, Minerals, Fossils in Colorado America's Mountain: Pikes Peak and the Pikes Peak Region...Atlas of Colorado American Gem Trails Nature As Sculptor: A Geologic Interpretation of Colorado . Scenery |  | | Journal (issue) | | 2008 Table of Contents Collecting Minerals in Colorado - Peter Modreski ...........................Pg...Mining Update .......................... Pg. 20 Colorado Fossil Woods - Frank Daniels ...................on collecting minerals in Colorado by Pete Modreski, the informative Colorado petriļ¬ed wood article by...the magazine so you get your very own copy! Colorado Minerals is the theme of the 2008 Denver Gem and...for the most part, the glory days of Coloradoās gold, silver, and base metal mining are past, and those |  | | Journal (article/letter/editorial) | | Museum of Nature and Science 2001 Colorado Boulevard Denver, Colorado 80205-5798 jmurphy @ dmns.org PETER...Survey MS 150, Box 25046 Federal Center Denver, Colorado 80225-0046 pmodresk @ usgs.gov Unless otherwise...to 2000) J oin us for a gemstone tour around Colorado! Our field trip takes us from east to west in...in the same way you may have toured through Colorado on a mineral collecting trip. This route, from the...gemstones are known to occur. We cannot discuss every Colorado gemstone occurrence; rather, this is a general |  | | 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...determined for three other regional ignimbrites (Wall Mountain Tuff, 36.7 Ma; tuff of Stirrup Ranch, 36.5 Ma;...0 Ma), Guffey (36.1 Ma), Waugh Mountain (31.6 ā31.3 Ma), and Nathrop (30.4ā28.9 Ma). Dated plutons in |  | | 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 | | 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 |  | | Book | | Pumice 5. 3. II. 6. 7. 8. 9. 10. 11. Rhyolite Colorado Mass. Felsite (Aporhyolite) Quartz-Felsite Porphyry...Porphyry South Dakota Rhyolite Porphyry (Nevadite) Colorado Pumiceous Rhyolite 13. 14. 15. 16. 17. 18...Granite Mass. Binary Granite N. H. Binary Granite Colorado Biotite-Granite R. I. Biotite-Granite Vermont...Sanidine-Trachyte Colorado Trachyte Porphyry S. Dakota 23. Bostonite 27. 28. 29. Phonolite Colorado Leucite-Syenite...Monzonite Colorado Phonolite-Nephelite-Syenite Series: IV. V. Perlite Colorado Vitrophyre Colorado Rhyolite-Granite |  | | Journal (issue) | | DIEGO FREEWAY 14051 p a c if ic COAST HIGHWAY Gold-Nevado Co. California Hours: Tues-Sar. 10-5 Sunday...Julius Weber Mamaroneck, New York COLORADO ISSUE #2 Articles Colorado locality index.............................. 323 by B. L. Muntyan Whatās new in Colorado minerals? ......................................339 by M. I. Jacobson The San Juan Mountains of Colorado ..................................349 by J. A...10 cm tall, from the Yucca Hill claim, Park County, Colorado. Richard A. Kosnar specimen; photo by John |  | | 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 |  | | Book (edition) | | and often gems can be found. valuable For the mountain ranges and level for the ist to States contain...beautifully hasn't thrilled to the sight of mounted in gold or or silver, some lovely gem, against lying...every blood red glow, every touch of green, blue, gold or royal purple. Gem stones have been the treasures...KYANITE LAZULITE t^^*l IDOCRASE lOLITE k:^ RUBY /^^ RUTILE SAPPHIRE 1^ TOURMALINE CRYSTALS ...certain rock formations, some is a saying that gold is where you nature has not scattered her treasures |  | | Journal (article/letter/editorial) | | is from Leiperās quarry at Springfield, Delaware County, Pennsylvania (Peters 1984). When the spessartine...to 7 cm across occur near Middletown, Middlesex County, and massive spessartine and relatively small crystals...localities in Figure 2. A classic Avondale, Delaware County, Pennsylvania, spessartine specimen with a major...HUK [OL *PU JPUUH[P4PULYHS:VJPL[` Delaware County, Pennsylvania. Detailed work by Lindsley and Peters...from pegmatites of the Amelia district, Amelia County, Virginia (Sinkankas 1959, 1997). Here, complex |  | | Journal (article/letter/editorial) | | MINERAL COLLECTING BY CAMPER IN COLORADO By LAWRENCE AND HARRIETTE SCHOPPEE 9 Greenbrier St., Springfield...investigating such a claim? We took our Camper to Colorado and now that state rivals Canada in our list of...campgrounds are available, and many new sites in Colorado are being opened every year. Our sleeping bags...described in Professor Richard M. Pearl's book, "Colorado Gem Trails and Mineral Guide." As in any other...before starting to collect in Colorado. Traveling from Massachusetts to Colorado is a trip in itself but don't |  | | Journal (article/letter/editorial) | | RhyoliCe of.Ruby Mountein of theNathrop Volcanics Colorado 35048 ' (Oligocene), very phenocryst poor rhyolite... Noble, unpub. data) 6. RhyoliCe of Shoshone Mountain (Fliocena)ā¢ aphyrtc rhyolite (Orklld, 1971) Sample...temperaturesnents,with the possibleexceptionof the Gold Flat MOBILITY Tā¢LE 2. OF URANIUM AND THORIUM....The samplesof rhyoliteof Ruby Mountain in the Nathrop VolcanƱcs, the Gold Flat Member of the Thirsty...two unusualspecimens / / (Nos. 7N and 7C) from the Gold Flat Member, the thorium contentsof the nonhydratedand |  | | Journal (article/letter/editorial) | | garnet from the Topopah Spring Tuff at Yucca Mountain, Nevada, USA R. J. MOSCATI* AND C. A. JOHNSON U.S...Federal Center, Box 25046, MS 963, Denver, CO 80225, USA [Received 20 January 2014; Accepted 10 April 2014;...Spring Tuff of the Paintbrush Group from Yucca Mountain, in southern Nevada. The Miocene-age Topopah Spring...not found in the Topopah Spring Tuff at Yucca Mountain. Based on their occurrence only in lithophysae...lithophysal ļ¬oors. K EY WORDS : garnet, Yucca Mountain, vapour phase, oxygen isotope, tridymite, Topopah |  | | Journal (article/letter/editorial) | | Although Colorado may be most noted for rhodochrosite or amazonite, the many varieties and associations...a k e w o o d , Colorado 80225 DIANNE L. K I L E 333 S a l e m Street Aurora, Colorado 80011 C O L O...above sea level; with more than eight hundred mountain peaks exceedĀ ing 11,000 feet, the average elevation...and J. A. MurĀ phy for an update to Minerals of Colorado: A 100-Year Record (Eckel, 1961). 374 ROCKS... Quartz was a familiar gemstone to many early Colorado residents, as documented by an extensive body |  | | Journal (issue) | | - - - - - - - - - - - Mineral Collections 1n Colorado A Supplement to The Mineralogical Record November-December..."Smithsonian packet," Smoky Hawk claim, Florissant, Colorado. Collected in 2008; Dorris Family collection;...certificates for mines in the Cripple Creek District, Colorado, in 1898 and 1901. Sponsorship: This special supplement...Collecting in Colorado The Collections: Mel & Pam Bersch Ryan Bowling Ralph Clark Colorado School of Mines...Thompson George Witters Martin Zinn III and Colorado in the :Mineralogical Record Supplement to The |  | 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) | | mineral resources of the Browns Canyon area, Chaffee County, Colorado By A.M. Leibold 1 , D.E. Detra 1 , and...does not imply endorsement by the USGS. Denver, Colorado UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL...mineral resources of the Browns Canyon area, Chaffee County, Colorado By A.M. Leibold 1 , D.E. Detra 1 , and...does not imply endorsement by the USGS. Denver, Colorado CONTENTS Page INTRODUCTION...................basin map of the Browns Canyon study area, Chaffee County, Colorado Geologic map and geochemical sample location |  | | 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 |
|
