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| General Geology of the Harold D. Roberts Tunnel, Colorado GEOLOGICAL SURVEY PROFESSIONAL PAPER 831-B General... General Geology of the Harold D. Roberts Tunnel, Colorado By CHARLES S. ROBINSON, LAWRENCE A. WARNER, and...ENGINEERING GEOLOGY OF THE HAROLD D. ROBERTS TUNNEL, COLORADO GEOLOGICAL SURVEY PROFESSIONAL PAPER 831-B...Roberts Tunnel line, Park and Summit Counties, Colorado..............In pocket 1. Strike-frequency diagram...Foliation and mineral lineation of Precambrian rocks north and south of Montezuma stock............ 29 4. Foliation |
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| Park Range Vicinity, Jackson and Routt Counties, Colorado By GEORGE L. SNYDER, U.S. GEOLOGICAL SURVEY, LOWELL...Park Range vicinity, Jackson and Routt Counties, Colorado. (Studies related to wilderness-wilderness areas)...mineral resources-Colorado--Jackson County. 2. Mines and mineral resources-Colorado-Routt County. 3. Geology-Colorado--Jackson...Geology-Colorado--Jackson County. 4. GeologyColorado--Routt County. I. Patten, Lowell L. II. Daniels, Jeffrey...Zirkel Wilderness and northern Park Range vicinity, Colorado, that are being considered for wilderness designation |
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| 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 |
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| PRECAMBRIAN ROCKS OF THE HALL VALLEY AREA, FRONT RANGE, COLORADO BY ERNEST E. WAHLSTROM AND OK JOON KIM ABSTRACT...The Hall Valley area, in northwestern Park County, Colorado, contains foliated highgrade Precambrian metamorphic...and composition 1234 Handcart anticline 1235 North Fork fault 1235 Foliation and cleavage. 1235 1218...diagrams for Hall Valley 3. ACF diagram for sillimanite-almandine subfacies 4. Triangular plot of chemical...metasedimentary rocks in the vicinity of Idaho Springs, Colorado. Later investigators extended the use of the term |
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| MINERAL RESOURCES OF THE RAWAH WILDERNESS, LARIMER COUNTY, COLORADO By R. C. Pearson, M. E. McCallum, and...Wilderness, Roosevelt National Forest, Larimer County, Colorado. ii SUMMARY The mineral resource potential...the southern Medicine Bow Mountains in north-central Colorado. The crest of the Medicine Bow Mountains...the study area is along the edge of the Laramie River valley, which is a steep-sided, glacially eroded...the Medicine Bow Mountains in Colorado comprise the southern end of a north-northwest-trending anticlinal |
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| ...........................................47 Colorado ...........................................................................................295 North Carolina ....................................................................................302 North Dakota ...........................................rights, so remember you were told. If in doubt, a county map will tell you who the legal owner is. Good...gemmy qualities for cutting and polishing. AUTAUGA COUNTY PRATTVILLE, N. 6 mi., and just E of the Birmingham |
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| ...........................................47 Colorado ...........................................................................................295 North Carolina ....................................................................................302 North Dakota ...........................................rights, so remember you were told. If in doubt, a county map will tell you who the legal owner is. Good...gemmy qualities for cutting and polishing. AUTAUGA COUNTY PRATTVILLE, N. 6 mi., and just E of the Birmingham |
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| -_----------------Anorthosite along the North Fork of the Clearwater River ____ ----------------Light-colored..._--------------------------13 Photomicrograph of a sillimanite-garnet-biotite schist southeast of Orphan Po...plagioclase-phlogopite rock along the Little North Fork of the Clearwater River (loc. 1495)---------------------...monzonite along the North Fork of the Clearwater River 2% miles east of the mouth of Thompson Creek________...monzonite along the North Fork of the Clearwater River 1 mile east of the mouth of Thompson Creek ___________________ |
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| Metasomatic metamorphism in western Clearwater County, Idaho. (B) Anorthosite and associated rocks in...the Elk River-Clarkia area, Idaho. (D) Idaho batholith near Pierce and Bungalow, Clearwater County, Idaho... Metasomatic Metamorphism in Western Clearwater County Idaho By ANNA HIETANEN METAMORPHIC AND IGNEOUS...Lamprophyres.. _ _______________________ Columbia River basalt_______-_----__---.__---__ PART 2. The Headquarters...__ Schist-_ _______________________________ Sillimanite-garnet schist _____________ Coarse-grained muscovite-biotite |
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| .s ~ ~ 00 ~ ~ "Sh Belt Series in the Elk River-Clarkia Area .s r ~ -<1 s Idaho ~ ~ -<1...344-C Metamorphism of the Belt Series in the Elk River-Clarkia Area Idaho By ANNA HIETANEN METAMORPHIC...porphyry ___________________________ -, - Columbia River basalt______________________________ Granitization...of potassium feldspar ________________ --- _ Elk River-Clarkia area as a part of the outer contact zone...FIGURE 1. Reconnaissance geologic map of the Elk River-Clarkia area, Idaho. . 1. 2. 3. 4A, B. 5A, B. 6 |
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| ______________________ _ Sillimanite-kyanite zone ____________ _ Sillimanite zone ___________________..._________ _ 3 3 6 7 7 7 North west-trending faults ____ - _____ _ North-trending faults ______________...staurolite in garnet-mica schist of the staurolite zone north of Junction Peak ____ 13 Photographs showing pseudomorphs...than do the Headquarters, Boehls Butte, and Elk River-Clarkia areas studied previously (Hietanen 1962a...allows correlation with known equivalents farther north with greater certainty than could be done previously |
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| BIBLIOGRAPHY OF WATER-RELATED STUDIES, SOUTH PLATTE RIVER BASIN-COLORADO, NEBRASKA, AND WYOMING by Kevin F. Dennehy...GEOLOGICAL SURVEY Open-File Report 93-106 Denver, Colorado 1993 I JUL t 5 1993 U.S. DEPARTMENT Of THE...Figure 1. Map showing location of South Platte River basin study unit 2. Keywords used in electronic... BIBLIOGRAPHY OF WATER-RELATED STUDIES, SOUTH PLATTE RIVER BASIN-COLORADO, NEBRASKA, AND WYOMING BY KEVIN F. DENNEHY...factors that affect water quality in the South Platte River basin. This publication is the first product of |
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| ...........................................59 Colorado ...........................................................................................346 North Carolina ....................................................................................356 North Dakota ..........................................................548 Table of Maps Page Alabama County Map ...................................................................................4 Alaska County and Stream Map ............................... |
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| Wilderness, Lake County, Colorado U.S. GEOLOGICAL SURVEY BULLETIN 1636. ~ COLORADO Mineral Resource...Potential of Mount Massive Wilderness, Lake County, Colorado By R.E. VAN LOENEN, G.K. LEE, and D.L. CAMPBELL...CAMPBELL U.S. Geological Survey JOHN R. THOMPSON U.S. Bureau of Mines U.S. GEOLOGICAL SURVEY BULLETIN...potential of Mount Massive Wilderness, Lake County, Colorado I by R.E. Van Loenen ... [et al.]. p. em....: I 19.3: 1636 1. Mines and mineral resources-Colorado-Mount Massive Wilderness. 2. Mount Massive Wilderness |
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| Belt Supergroup in the Coeur d'Alene area, to the north. These rocks are underlain by the Boehls Butte Formation...uplifted block between the North Fork and Little North Fork of the Clearwater River. The metamorphic grade...greenschist facies near the St. joe River in the north to sillimanite grade of amphibolite facies near the...aluminum silicates-kyanite, andalusite, and sillimanite-occur together with staurolite, cordierite, garnet...northeast-trending fold axes and lineations. Folds on north-south-trending axes occur near some faults. INTRODUCTION |
 | 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). |
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| arawak and North Borneo _________________ _ Sarawak _____________________________ _ North BorneO----...________ _ North Island_____ ------------- ________ _ Antarctica ________________________________ _ North Am...________ _ Beach deposits ___ -----------------Colorado _____________________________ _ Crystalline rocks...124 126 127 130 Monazite localities-Continued North America-Continued United States of America-Continued...Perce Counties __________ _ Idaho CountY-----------------Valley CountY-----------------Adams, Payette, |
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| 1956 Nos. 1 and 2 KYANITE, ANDALUSITE, AND SILLIMANITE IN THE SCHIST IN BOEHLS BUTTE QUADRANGLE, IDAHO*...Geological Asstnect Kyanite, andalusite, and sillimanite are found together in the cordierite-bearing...inversions took place: (1) sillimanite+kyanite, (5) an(4) kyanite+sillimanite, (3) kyanite+andalusite,... (2) siliimanite+andalusite, dalusite+sillimanite. These inversions can be in part related to the fluctuation...together gneiss on Smith Ridge . Kyanite-andalusite-sillimanite-cordierite Description of the gneiss . . . Optical |
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| Dillon Quadrangle, Summit and Grand Counties, Colorado By Kari S. Kellogg1 Open-File Report 97-738...Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product...Dillon Quadrangle, Summit and Grand Counties, Colorado By Karl S. Kellogg This database, identified as...swamp deposits in and adjacent to beaver ponds in North and South Willow Creek valleys. Maximum thickness...from side streams of Blue River Valley, North Fork of the Williams Fork River, and Straight Creek. Include |
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| Geology of the Platte Canyon Quadrangle Colorado By WARREN L. PETERSON CONTRIBUTIONS GEOLOGICAL TO...quadrangle. _ In pocket FIGURE 1. Index map of Colorado showing location of the Platte Canyon quadrangle...GEOLOGY GEOLOGY OF THE PLATTE CANYON QUADRANGLE, COLORADO By WARREN L. PETERSON ABSTRACT The Platte Canyon...strike dominantly westnorthwest and dip steeply north. Dominant lineations plunge steeply northnortheast...Front Kange in Colorado (fig. 1). The quadrangle is accessible from the north by county roads that lead |
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| DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY COLORADO SCIENTIFIC SOCIETY FALL FIELD TRIP September...PROTEROZOIC VOLCANOGENIC SEQUENCES IN CENTRAL COLORADO John C. Reed, Jr. U.S. Geological Survey Trip...Leader K. Lee Shropshire University of Northern Colorado Chairman, Field Trip Committee Open-File Report...Geological Survey editorial standards Denver, Colorado 1991 INTRODUCTION1 Precambrian crystalline...exposed in the Laramide and post-Laramide uplifts in Colorado and southern Wyoming include Early Proterozoic |
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| 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...map of the Hot Sulphur Springs quadrangle, Grand County, Colo __________________________ In pocket FIGURE...rocks in Middle Park, Colo., and selected areas in Colorado, Nebraska, and Wyoming__________________________________________...__________________________ 64 23. View looking north at Mount Bross fault___________________________ |
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| NORTH CAROLINA DEPARTMENT OF CONSERVATION WILLIAM DIVISION JASPER P. OF L. SAUNDERS, MINERAL...RESOURCES GEOLOGIST Circular 16 LOCALITIES NORTH OF CAROLINA BY JAMES F. CONLEY Doc NC DENR.......... ACKNOWLEDGEMENTS MINERAL COLLECTING IN NORTH CAROLINA , . . . . # . WHERE TO COLLECT f ... f...THE MINERAL LOCALITIES OF NORTH CAROLINA BY COUNTIES . . ALAMANCE COUNTY 5 5 Pyrophyllite ......... f .......... 5 ALEXANDER COUNTY ................. 7 Emerald, Hiddenite and Associated Minerals |
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| 500 m.y. ago in an aulacogen on the edge of the North American craton. Basic sills, emplaced during the...considered synchronous with the batholith. The sillimanite grade of the Belt metasediments appears to have...scattered fault-bounded troughs dispersed on the North American craton. The largest of these troughs,...Archean craton split up about 1,500 m.y. into the North American craton and the Siberian platform, and the...progressively separated. The western limit of the North American craton can be taken as the limit of Precambrian |
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| Precambrian Petrochemistry of the Northern Park Range, Colorado, and Its Implications for Studies of Crustal Derivation... Precambrian Petrochemistry of the Northern Park Range, Colorado, and Its Implications for Studies of Crustal Derivation...GEOLOGICAL SURVEY PROFESSIONAL PAPER 1343 Studies of sillimanite-grade Proterozoic rocks, particularly mafic and...1927Precambrian petrochemistry of the northern Park Range, Colorado, and its implications for studies of crustal derivation...Park Range ..................................... Colorado ....................................... Crust-mantle |
