 | | 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 |  | Pearson, R.C., Braddock, W.A., Flanigan, V.J., Patten, L.L. (1981) Mineral resources of the Comanche-Big South, Neota-Flat Top, and Never Summer Wilderness Study Area, north-central Colorado. Open-File Report Vol. 1981 (81-578) US Geological Survey doi:10.3133/ofr81578 | Report (issue) | | Never Summer Wilderness Study Areas, North-Central Colorado By Robert C. Pearson, William A. Braddock, and...Never Summer wilderness study areas, north-central Colorado.................................................Top, and Never Summer wilderness study areas, Colorado.................................................Neota-Flat Top, and Never Summer wilderness study area, Colorado....... In pocket Index map showing location of...Top, and Never Summer wilderness study areas, Colorado.............................................. |  | | Journal (article/letter/editorial) | | COLORADO TOPAZ Topaz, Al Si0 (F,OH) is one of Colorado's better known gem minerals. Though Col orado...(PJM), 975 (TCM) Box 25046, Federal Center Denver, Colorado 80225-0046 A ccording to Cross and Hillebrand...discovery of Colorado topaz was made about 1880 by a Mr. Thiebald,* "a prospector of Colorado Springs."...longest dimension, associated with feldspar, smoky quartz, and zircon. The large fragment was said to be...area. The largest fine-quality topaz specimens in Colorado occur in several separate and distinct localities |  | | Journal (article/letter/editorial) | | 1, 1944 STRUCTURE AND PETROLOGY OF SPECIMEN MOUNTAIN, COLORADO BY ERNEST E . WAHLSTROM CONTENTS Page...ILLUSTRATIONS Figure Page 1. Outline map of north-central Colorado................................................................... 78 2. Geologic map of Specimen Mountain area............................................... 81 3. Geologic cross sections of Specimen Mountain.............................................Iceberg Lake to Specimen Mountain................ 84 6. Larsen plots of Specimen Mountain rocks........ |  | 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). |  | | Book (edition) | | and often gems can be found. valuable For the mountain ranges and level for the ist to States contain...gem stones mon dull are as hard or harder than quartz, a com- mineral everywhere present as dust which...Hardness Scale 6. Orthoclase 1. Talc 2. Gypsum 7. Quartz Topaz Corundum 10. Diamond 3. Colcite 8. 4...Your will scratch orthoclase feldspar but not quartz. In making hardness appears to be a scratch paper...the general arrange- ment of these surfaces. Quartz and amethyst, for example, are frequently crystallized |  | | Book (edition) | | COLO RAD O GEM T RAILS t.lilky quartz crystals, Ow-ay. Katherine H . Jensen. AND MINERAL GUID E RICHARD...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...Swallow, Publisher) 2679 South York Street Denver, Colorado 80210 - , =· - ·, BOOKS BY RICHARD M. PEARL...Exploring Rocks, Minerals, Fossils in Colorado America's Mountain: Pikes Peak and the Pikes Peak Region |  | | Book (edition) | | — _ ; COLORADO GEM TRAILS AND MINERAL GUIDE ! ■ : ' BOOKS BY RICHARD M. PEARL Colorado Gem Trails...Trails and Mineral Guide Colorado Rocks, Minerals, Fossils America’s 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 ★ COLORADO GEM TRAILS AND MINERAL GUIDE ★ SKETCH MAPS BY MIGNON WARDELL PEARL |  | | 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 » » » *«» 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 (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...the Front and Park ranges is a series of high mountain valleys extending from north to south, separated...GAZETTEER OF COLORADO. through the Park Range on its way to join Green River, forming the Colorado. Middle...peaks exceeding 14,000 feet. At the north is the Mountain of the Holy Cross, with a height of 14,170 feet; |  | | Report (volume) | | the ruby, sapphire, spinel, emerald, rutile, and quartz of gem quality have been synthesized. The best...Fluorite Apatite . 6. 7. 8. 9. 10. Orthoclase Quartz Topaz Corundum Diamond The numbers preceding each...of silica (quartz, 7 on Moh's scale) particles, a gem stone should be harder than quartz. Some minerals...react to heat are: violet quartz (amethyst) changing to orange brown, smoky quartz to yellow, pale-green...sapphire, star sapphire, star ruby, rutile, and quartz are gem stones that have been successfully synthesized |  | | 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 |  | | Book | | Roads and Trails of Rocky Mountain National Park Halka Chronic MOUNTAIN PRESS PUBLISHING COMPANY MISSOULA...writing from the Publisher. Copyright © 1984 Mountain Press Publishing Co. Library of Congress Cataloging...Rockies. 1. Geology—Colorado—Rocky Mountain National Park— Guide-books. 2. Rocky Mountain National Park...S. 36 Lyons to Rocky Mountain National Park.. U.S. 34 Loveland to Rocky Mountain National Park U.S. 34...34 Granby to Rocky Mountain National Park .. Colorado 7 Lyons to Estes Park......... III Roadside Geology: |  | | Journal (article/letter/editorial) | | lechatelierite particles must have been originally grains of quartz or other non-hydrous silica. These grains were...(1940). ORE-BEARING PIPES IN TI{E TARRYALL RANGE' COLORADO ROBERT D. BUTLER AND I,. B. RII,EY A number...explaining the motion of Iines produced by the quartz wedge. (In the case of a biaxial crystal, sliced...following association and sequence: whitlockite and quartz-rhodochrosite-apatite-zeolite. The mineral is named...Gillespite, Feo.Bao.4Sior, in Alaska'and in Mariposa County, California, with sanbornite, BaO'2SiOz, and barium |  | | Book | | Catalog Card Number: 74-1276 The pictures of gold-in-quartz, smithsonite, stilbite, and wulfenite on the front...comfort and time to hold in their hands a single specimen of a gemstone never before seen by human eyes...is enhanced. They could probably buy a similar specimen in a rock shop or jewelry store for a fraction...learn that gravel beds are rich in such minerals as quartz, feldspar, mica, garnet, tourmaline, magnetite...Schists often contain feldspar, garnet, mica and quartz. With sapphires are often found associated an abundance |  | Burt, Donald M., Sheridan, Michael F., Bikun, James V., Christiansen, Eric H. (1982) Topaz rhyolites; distribution, origin, and significance for exploration. Economic Geology, 77 (8) 1818-1836 doi:10.2113/gsecongeo.77.8.1818 | Journal (article/letter/editorial) | | MnFe garnet, bixbyite, pseudobrookite, specularite,quartz, and other minerals.In the western United States...soccuron both sidesof the ColoradoPlateau (in Colorado,New Mexico, Arizona, Utah, and Nevada) and in...Introduction occurrencein a lava flow near Nathrop, Colorado, IN 1884 Whitman Crossdescribedtopaz, A12SiO4F2...porphyriticrhyolitedomeat Chalk Mountain, and garnet in samplesof lithophysalrhyolite lava Colorado,lessthan4 km westof...Crossreviewedthisand a similar 1959, the Spor Mountain beryllium depositswere discoveredin this same |  | | Journal (article/letter/editorial) | | Arizona 85287, USA 1 Department of Geology, University of Iowa, Iowa City, Iowa 52242, USA z Applied Geologic...Geologic Studies, Englewood, Colorado 80110, USA ,Abstract. High-silica topaz-bearing rhyolites of Cenozoic...Cenozoic age are widely distributed across the western USA and Mexico. They are characteristically enriched...groundmasses. Magmatic phases include sanidine, quartz, oligoclase and Fe-rich biotite. Allanite, fluorite...Grande rift (New Mexico and Colorado) and thus appear to surround the Colorado Plateau. Similar middle to |  | | Journal (article/letter/editorial) | | DEPOSITS IN THE SPECIMEN MOUNTAIN VOLCANICS, ROCKY MOUNTAIN NATIONAL PARK, COLORADO EnNBsrE. Wanrsrnou...Colorad.o. Assrnecr Specimen Mountain, in Rocky Mountain National Park, Colorado, is a denuded Tertiary...551 552 .)JJ 55s 55s 556 559 561 LocerroN Specimen Mountain (elevation 72,482feet) is a prominent landmark...continental divide at the crest of the Front Range of Colorado (Fig. 1). It lies just north of Poudre Lake at...Milner Passin the northwestern corner of Rocky Mountain National Park. Streams on the south side drain |  | | Book (edition) | | atid aeseae eueneSasehr i ia Bdtit _WYOQMING COLORADO _ LADORE 7C CRAIG r3GRANBY 17d KREMMLING...COEORADORI 2 NEW MEXICO x pec, Inn? UKE) COLORADO TOURS LEGEND NUMBERED TOURS UNNUMBERED TOUR...Gallege COLORADO A Guide to the Highest State WITHDRAWN AWAACK TAY 2 \e Line COLORADO A Guide...Program Projects Administration of the State of Colorado AMERICAN GUIDE SERIES ILLUSTRATED HASTINGS...Note About the New Edition This revision of Colorado, A Guide to the Highest State, brings abundant |  | | Report (issue) | | the Hot Sulphur Springs Quadrangle, Grand County, Colorado GEOLOGICAL SURVEY PROFESSIONAL PAPER 586...the Hot Sulphur Springs Quadrangle, Grand County, Colorado By GLEN A. IZEIT GEOLOGICAL SURVEY PROFESSIONAL..._______________ _ Biotite-quartz diorite _______________________ _ Quartz monzonite __________________________...19 Grouse Mountain Basalt and related dikes _____ _ Boulder conglomerate of Gravel Mountain ___ _ Conglomerate...map of the Hot Sulphur Springs quadrangle, Grand County, Colo __________________________ In pocket FIGURE |  | | Book (volume) | | 56 ct), Sweet Home Mine, Colorado; colorless scheelite (19.66 ct), Kern County, California; octagonal...Vivid blue matched benitoite gems from San Benito County, California, consisting of 52 benitoites and 75...Dosen ONN/ QBI96-40247 Trade Distribution by Mountain Press Publishing Company P.O. Box 2399, Missoula...Cantlin, Ellis, [D; Jeannette B. Carillo, Gem Center USA, EI Paso, TX; Gary Christopher, The Prospectors Cache... Hughes, Boulder, CO; Duane L. Johnson, Rocky Mountain Soapstone, Butte, MT; Chris I. Johnston, Royal |  | | Book (volume) | | variety and wealth of locality information concerning quartz gemstones are recognized in a separate chapter...Kobuk jade locality. Descriptions of San Diego County, California, gemstones and the mines in which they...the generous assistance of many residents of that county. My special thanks are extended to Elbert H. McMacken...Rhodonite, Idocrase (Vesuvianite), The Garnet Group. Quartz FAMILY GEMSTONES RarRE AND UnusuaL GEMSTONES Chrysoberyl...DECORATIVE GEMSTONES Granite, Graphic Granite, Unakite, Quartz Porphyry (Leopardite), Orbicular Gabbro-Diorite |  | | Report (volume) | | northwestern Kansas._____________________ Northern Colorado and northeastern Utah________________________...Nebraska and northwestern Kansas. Map of northern Colorado and northeastern Utah. Page Index map showing...from the southern margin of the Colorado Plateau to the Rocky Mountain foothills in south-central Canada...change in trend shown on the geophysical maps. Mountain ranges in the foreland characteristically have...many mountains and basins. The distribution of mountain ranges in the foreland is related in part to the |  | | 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..._ Igneous rocks _____________________________ _ Quartz monzonite gneiss ________________ _ Granite gneiss...gneiss and gneissic aplite ________ _ Quartz diorite and associated hornblendite_ Boulder Creek granite..._____________________ _ Copper deposits in Jefferson County __ _ F. M.D. property _____________ _ Malachite |  | | 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...cross sections of the Pine Grove-B la*n Mountain area. Beaver County, Utah: U. S. Geological Survey Open-File...molybdenum system, southern wah wah Mountains, Beaver County, Utah (abstract): American Institute of Mining...deposits of the Mount Antero region, Chaffee County, Colorado: U.S. Geological Survey Bulletin 982-D, p |
|
