 | | Journal (article/letter/editorial) | | northeasterly-trending continentul Figure 2. Geologic map of the Colorado Front Range showing the Precambrian metamorphic...Karistrom 1978; Lanthier 1978). Farther south in Colorado, sediments accumulated in decper-water rocks formed...Survey into “Early, Middle, and Late” Eras. In Colorado we because of the subsequent folding and overthrusting...subduction zone and possibly the creation Era in Colorado and Wyoming of a volcanic island arc. Carpenter...perhaps be the Phillipine island arc, and Jack Colorado show two major rock groups with different ages |  | | Journal (article/letter/editorial) | | PETROLOGY AND MINERALOGY OF THE MOUNT ROSA AREA, EL PASO AND TELLER COUNTIES, COLORADO. I. THE GRANITES1 E. B...Michigan, Ann Arbor, Michigan. Assrnacr 'Ihe Mount Rosa area includes many small segregations and sill-like...pyrrhotite, with lesser monazite and bastnaesite. The Mount Rosa body, an alkalic riebeckite granite, forms a...variants of the Mount l{osa granite include xenoliths of Pikes Peak granite. The Mount Rosa granite contains...countJead isotope method on zircons from the Mount Rosa granite and by theKa0/Araomethod on riebeckite |  | | Journal (article/letter/editorial) | | PETROLOGY AND MINERALOGY OF THE MOUNT ROSA AREA, EL PASO AND TELLER COUNTIES, COLORADO. II. PEGMATITESI EuceNB...in related alkalic granites in the Mount Rosa area, west of Colorado Springs. One is the older calc-alkalic...younger is the alkalic Mount Rosa type. The accessory assemblage of the Mount Rosa quartz-microcline-riebeckite...determinations on zircons from pegmatites of the Mount Rosa type proved to be inconsistent, but ages determined...pegmatites of the St. Peters Dome district, Mount Rosa area,Colorado,attracted the attention of mineralogists |  | | Journal (article/letter/editorial) | | (Keyvy) Fluorite-zirconosilicate pegmatites (El Paso, Teller) alkaline granite Subalkaline-alkaline...Windy Point, Colorado 26 22 26 10.3 22.6 54.8 17.5 29.1 7.0 + 0.1 0.1 Gold Camp, Colorado - 31.0...0 21.2 36.5 30.4 23.1 23.9 - El Paso, Colorado Teller, Colorado Biotite-riebeckite and biotite-fayalite...An content of plagioclase Mineral Pikes Peak, Colorado Bayan Aul, Kazakhstan (ring) Gorikho, Mongolia...44 5.42 0.73 1.37 13.30 - 74.81 Pikes Peak Colorado - 2.4 2.7 0.2 1 0.05 23.4 35.1 3.6 30.8 98 |  | | Report (issue) | | Granite, California _ __ _ ___ Granodiorite, Johnston County, Okla_ __ 9 99 39 25.4 31 68 20 37 . . __________...______ ___ _____ Mount Tremont, N. H_ __ _ __ Hastingsite granite, Jackson Falls, N. EL _______ _ _ __..._____ Riebeckite granite, Brewster County, Tex. (!)_____ _____ Mount Rosa, Colo. (3) _ ___ __ _ __ Conway...Riebeckite rhyolite, Brewster, County Tex. (7) ______ __ _ _ Jeff Davis County, Tex. (2)_ _ _ _____ 61 30...Wheatland County, Mont. (3)______-________Marathon County, Wis. (3)_________.________ Fremont County, Colo |  | | 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 |  | | Book (edition) | | MILEAGE L OGS. REVISED EDITION Revised Edition, COLORADO GEM TRAILS AND MINERAL GUIDE HICllAHD :--1. PEARL...an extensive ¥em and mineral collecting tour 01 Colorado, revealing the interesting places where Nature...highways. Latest information is given on local tra\'el and collecting conditions and land ownership, so...Swallow, Publisher) 2679 South York Street Denver, Colorado 80210 - , =· - ·, BOOKS BY RICHARD M. PEARL...PEARL Exploring Rocks, Minerals, Fossils in Colorado America's Mountain: Pikes Peak and the Pikes Peak |  | | Book | | and ap praisal for phosphate and vermic u l i te el ewhere. A nu mber of occu rrences in Ontario is described...Lake '1 1 La t Lake 12 Atlin 13 Atsutla Range 14 Mount Edziza 15 Galore Creek 16 Lonnie 17 Goosly Lake...i ver 30 Mount Copeland 31 Trident Mountain 32 K i n basket Lake 33 Mount Laussedat 34 Mount H unter 35...Quarry Montreal 127 Mount Royal 128 Brossard 129 Masson Street 130 St-Amable 1 3 1 Mount Bruno 1 32 St Jean...Jean 133 Mount St H i l a i re 134 Rougemont 135 lberville 136 Mount Joh nson 137 Mou n t Yamaska 138 |  | | 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 | | long (Marty, 2004 ). AFRICA widely in Litchfield County, where good crystals were taken from quartz veins...region (Brunet, I 977b ). NEW YORK Amity, Orange County. At many isolated collected sites between the towns...Amity (Chamberlain and Robinson, 2013). MALAWI Mount Malosa, Chilwa alkaline province, Zomba district...discoveries in the famous alkaline pegmatites of Mount Malosa in the late 2000s include specimens showing...Litchfield County. Ilmenite masses and crystals from somewhere near Washington, Litchfield County, were described |  | | Report (issue) | | estimates for uranium-vanadium deposits on the Colorado Plateau: U.S. Geol. Survey Bull. 1030-D, p. 137...geostatistical analyses and computer simulation: Colorado School Mines Quart., v. 64, p. 71-98. Haun, J...Mineral-resource appraisal by the U.S. Geological Survey: Colorado School Mines Quart., v. 45, no. 1A, p. 1-27. -...States (as of December 31, 1968): Golden, Colo., Colorado School Mines Found., Inc., p. 21-30. Pratt, W... Dawsonite in the rich oil-shale deposit·s of Colorado is a possible source of aluminum that may be a |
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