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Cummingtonite from
Idaho Springs Formation, Gilpin County, Colorado, USA


Locality type:Formation
Classification
Species:Cummingtonite
Formula:◻{Mg2}{Mg5}(Si8O22)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Cummingtonite data
Locality Data:Click here to view Idaho Springs Formation, Gilpin County, Colorado, USA
Data Identifiers
Mindat Occurrence Record ID:435145
Long-form Identifier:1:3:435145:0
GUID (UUID V4):d7cf64e5-fee8-495c-aece-8000b400be37
References
Reference Search (possible matching items)
Report (issue)
Geology of Precambrian Rocks Central City District Colorado GEOLOGICAL SURVEY PROFESSIONAL PAPER 474-C Prepared... Geology of Precambrian Rocks Central City District Colorado By P. K. SIMS and D. J. GABLE SHORTER CONTRIBUTIONS...1918Geology of Precambrian rocks, Central City district, Colorado, by P. K. Sims and D. J. Gable. Washington, U...district, Colorado. 1964. (Card2) 1. Geology, Stratigraphic Pre-Cambrian. 2. Geology Colorado Gilpin Co. I...district, Gilpin County, Colorado. 2. Geologic sections of the Central City district, Gilpin County, Colorado
Journal (article/letter/editorial)
Geological Survey, Vermillion, S. D. Paleozoic Colorado land mass extended from northern Black Hills nearly...transgression lasting to mid-Turonian (embracing Graneros formation). Basin downwarping recurred during Laramide and...across South Dakota. Wisconsin glaciation and formation of Missouri River are later than the old age valleys...State Geological Survey, Vermittion, S. D. A formation of chert and volcanic ash crops out east of Sioux...the Northern States Power Plant, indicates a formation at least 60 feet thick, composed of chert, containing
Journal (article/letter/editorial)
BEARING VEINS, CENTRAL CITY DISTRICT, GILPIN COUNTY, COLORADO • PAUL K. SIMS CONTENTS PAGE Abstract...sulfide-bearingquartz veins in the Central City district, Colorado,within the mineral belt of the Front Range. The...0 104ø tO•ø 50 Miles FIGUREI.-INDEX MAP OF COLORADO SHOWINGLOCATION OF CENTRAL CITY DISTRICT. PARAGœN...CentralCity districtis in the core of the Front Rangeof Colorado• a complexof Precambrianmetamorphicand igneousrocks...relative to rocks below is obscure. Cordierite-cummingtonite gneissl Biotite-quar tz-plagioclase gneiss Sillimanitic
Report (issue)
Sequence Along Coal Creek to Idaho Springs Formation Front Range, Colorado By JOHN D. WELLS, DOUGLAS M...1. Index maps of the Coal Creek area, Eldorado Springs, Ralston Buttes, and Blackhawk quadrangles..-_________...SEQUENCE ALONG COAL CREEK TO IDAHO SPRINGS FORMATION, FRONT RANGE, COLORADO By JOHN D. WELLS, DOUGLAS M...high-grade metamorphic gneisses of the Idaho Springs Formation elsewhere in the Front Range. Accordingly...facies of the predominantly metasedimentary Idaho Springs Formation and not as a tectonically younger stratigraphic
Report (volume)
Eureka Gulch Area Central City District Gilpin County Colorado GEOLOGICAL SURVEY BULLETIN This report...Eureka Gulch Area Central City District Gilpin County Colorado By P. K. SIMS, F. W. OSTERWALD, and E....AND ORE DEPOSITS OF CLEAR CREEK, GILPIN, AND LARIMER COUNTIES, COLORADO GEOLOGICAL SURVEY BULLETIN ...23 24 27 29 31 IV GEOLOGY AND ORE DEPOSITS, COLORADO ILLUSTKATJONS PLATE 1. Geologic maps of the Eureka...map showing location of Eureka Gulch area, Gilpin County, Colo_________________-.._____--___---__----__3
Report (volume)
(A) Geology of Precambrian rocks, Idaho Springs district, Colorado, by Robert H. Moench. (B) Geology...and iron content of rocks from the Red Mountain Formation, Alabama, by Richard P. Sheldon. (E) Investigations... Geology of Precambrian Rocks, Idaho Springs District, Colorado By ROBERT H. MOENCH CONTRIBUTIONS...of the Idaho Springs district____________ In pocket 2. Geologic sections of the Idaho Springs district...mapped by present and previous workers in the Idaho Springs district ____________________ ----- ________
Report (issue)
Some High-Grade Cordierite Gneisses, Front Range, Colorado Dolores J. Gable U.S. Geological Survey, Denver...SOCIETY OF AMERICA, INC. Colorado Building P.O. Box 1719 Boulder, Colorado 80302 Printed in the United...65 65 66 67 ... Vlll CORDIERITE GNEISSES, COLORADO FRONT RANGE Factors determining the mineral assen1blages...75 77 81 85 FIGURES l. Map of Front Range, Colorado ............... ................. .......... ...cordierite-bearing rocks in central part of Front Range, Colorado ................................. ....... ...
Report (issue)
METAMORPHIC ROCKS OF THE CENTRAL FRONT RANGE. COLORADO By Dolores J. Gable ' Edited bv William. D....35 EARLY PROTEROZOIC PALEOGEOGRAPHY OF NORTHERN COLORADO........................ 3 6 REGIONAL STRUCTURE...Records Section, Denver Federal Center, Denver, Colorado] Page Plate 1. Geologic map of the Proterozoic...Range, Colorado ......... in pocket 2. Sample locality map of the central Front Range, Colorado.........20. 21. 22. 23. Index map of the Front Range, Colorado..............................................
Report (volume)
Part of the Morrison Quadrangle Jefferson County, Colorado GEOLOGICAL SURVEY BULLETIN 1251-E Geology...Part of the Morrison Quadrangle Jefferson County, Colorado By D. J. GABLE CONTRIBUTIONS TO GENERAL GEOLOGY...rocks along the mountain front due west of Denver, Colorado UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON...PART OF THE MORRISON QUADRANGLE JEFFERSON COUNTY, COLORADO By D. J. GABLE ABSTRACT The Morrison quadrangle...This sequence, which is typical of the Idaho Springs Formation, was intruded, in Precambrian time, by
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
Report (issue)
--------------Cleburne County ----------~-----------------­ Tallapoosa County --------------------------Alaska...------------------Cochise County -----------------------------Gila County --------------------------------Greenlee...ee County ----------------------------R[aricopa County ----------------------------R[ohave County --...-----------------------------Pima County -------------------------------Pinal County -------------------------------Santa...-------Santa Cruz County --------------------------'ravapai County -----------------------------'ruma
Report (issue)
Washington Zinc ore, Friedensville, Pa. Banded iron-formation, Palmer, Mich. 6. Ribbon asbestos ore, Quebec...Peninsula, Mich. 10. Porphyry molybdenum ore, Colorado 11. Zinc ore, Edwards, N.Y. 12. Manganese nodules...ocean floor 13. Botryoidal fluorite ore, Poncha Springs, Colo. 14. Tungsten ore, North Carolina Rutile...Gneiss and Related Rocks, East-Central Front Range, Colorado By SHERMAN P. MARSH and DOU1GLAS M. SHERIDAN GEOLOGY...and geochemical study of rutile-bearing rocks in Colorado and a description of their occurrence elsewhere
Report (issue)
Deposits of the Ralston Buttes District Jefferson County, Colorado By DOUGLAS M. SHERIDAN, CHARLES H. MAXWELL...___ _ ~ Pennsylvanian and Permian: Fountain Formation ___________________________ _ Permian: Lyons Sandstone..._____________ _ Permian(?) and Triassic(?): Lykins Formation ____________________ --· ___ _ Mesozoic rocks...________________ _ Ralston Creek Formation ___________ _ Morrison Formation _______________ _ Cretaceous...Benton Shale ______________________ _ Niobrara Formation ________________ _ Pierre Shale _______________________
Journal (article/letter/editorial)
Childs Mielenz, Bureau of Reclamation, Denver, Colorado Werner Nowacki, Universitiit, Bern, Switzerland...Nevada. PETROLOGY OF THE GIIFFEY-MICANITE RXGION, COLORADO university ^iiff-'"l; lll'i.l.., "t Michigan...southeast part of Park County and in the north-central part of Fremont County, Colorado, is underlain chiefly...The preCambrian rocks include: (1) The Idaho Springs formation, which consists of mica schists and gneisses...of granitic material into rocks of the Idaho Springs formation. In addition to the pegmatite minerals
Report (volume)
Chicago, 111. Colorado College Publications: Science Series, vol. 12, no. 6. Colorado Springs, Colo. Colorado...Mines: Bulletin, vol. 4, no. 2. Golden, Colo. Colorado Scientific Society: Proceedings, vol. 8, pp. 363-422...363-422, vol. 9, pp. 5-112. Denver, Colo. Colorado, University of: Studies, vol. 5, nos. 2-4, vol. 6...Bulletins, nos. 10-12. Hartford, Conn. Delaware County Institute of Science: Proceedings, vol. 3, nos...Development Company's Survey. Charleston, Kanawha County, W. Va., 1907. 28 pp., 4 pis. Gives information
Journal (article/letter/editorial)
Petrogenesis of the 1·43 Ga Sherman Batholith, SE Wyoming, USA: a Reduced, Rapakivi-type Anorogenic Granite DEPARTMENT...GEOPHYSICS, UNIVERSITY OF WYOMING, LARAMIE, WY 82071, USA RECEIVED OCTOBER 13, 1998; REVISED TYPESCRIPT ACCEPTED...1·43 Ga Sherman batholith, southeastern Wyoming, USA, shows extreme A-type petrochemical characteristics...‘anorogenic’ granite provinces of the southwestern USA, Adirondacks, eastern Canada, southern Greenland...Grand Valley State University, Allendale, MI 49401, USA.  Oxford University Press 1999 KEY WORDS: A-type;
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 (issue)
Geological of America, Boulder, INC. Place Colorado Printed in the United States by Edwards Inc...8137-1131-2 Published THE GEOLOGICAL Society Card Colorado Michigan Soctety 80301 48104 The publication...Boulder County Tellurides .... 294 Boulder County Tungsten ...... eeoeeesee 296 Central City-Idaho Springs...e@eeeeeeoe 323 COLORADO PLATEAU (COLORADO-UTAH-NEW MEXICO-ARIZONA) ... 323 A. Rifle area, Colorado «0s... 323...323 B. Uravan District, Colorado 324 Cope tick Rock DIsEEIcL sCoLoradO) sietss) 0001010016 «06 324 DeeGkante
Report (issue)
carbonate replacement ores of the Drum Mountains, Juab County, Utah, by T. S. Levering, J. H. McCarthy, and Irving...Thortveitite associated with fluorite, Ravalli County, Mont., by R. L. Parker and R. G. Havens __-____-__-____...fluorine in mineralized tuff, Spor Mountain, Juab County, Utah, by W. R. Griffitts and L. F. Rader, Jr....rocks at the Georgia Nuclear Laboratory, Dawson County, Ga., by J. W. Stewart---___-_---_---_----_---...in Precambrian rocks, Central City quadrangl -, Colorado, by P. K. Sims and D. J. Gable...._______..___
Book (edition)
Conversion tables . 1 — — — CHAPTER The Formation of Minerals — — II . 20 . Solution and...Examples of springs in volcanic regions — Magmatic or juvenile waters —Salts of volcanic springs — The gases...gases in volcanic springs 65 —RartT ekmients in volcanic springs 79 —The igneous emanations. CTIAPllilR...Xll —By the original mode fra(*tur(^ of of formation of the rocks — By various modes of origin— Force...Washington — Sumatra— The — Telluride — Silvcrton Colorado— General Arizona —Gold-quartz veins rhyolite
Book (edition)
etc. of Conversion tables. CHAPTER II The Formation op Minerals — General features—Influence prestemperature—...Examples of springs mentary rocks — Salts from igneous rocks —Salts of volcanic springs —Origin of the...VIII Relations of Mineral Deposits to Mineral Springs 109 CHAPTER IX 1 mi. ding and Faulting — ...of openings 137 By the original mode of formation of the — By solution — By fractures of various...of kaolin — Metasomatic processes at Silverton, Colorado — Summan —Quicksilver deposits — The ores and
Report (issue)
GEOLOGY OF THE GORE CANYON-KREMMLING AREA, GRAND COUNTY, COLORADO by C. S. Venable Barclay i 1 it *v r>...--------------- --- - 73 Red beds of the State Bridge Formation on Precambrian rocks--- ------ ---------------...and Morrison Formation 111 35. Beds on either side of contact of Niobrara Formation and Benton Shale...- 131 32. 36. Lower part of the Niobrara Formation -- ^37. Fort Hays Limestone and basal portion...Niobrara Formation 38. - 135 Cliff in upper part of Smoky Hill Shale Member of Niobrara Formation 39.
Report (volume)
assistance of Susan M. Kingsbury. LEXICON Abel Gap Formation (Talladega Group) ABGP01 1. Paleozoic 2. Alabama...Highway 49 (Skyway Road) near town of Abel, Cleburne County. Absaroka Supergroup/Volcanic Supergroup U ABRK03...National Park, Park County, Wyo. Academy Church Shale Member (Springer Formation) ACMC01 1. Lower Pennsylvanian...Member (Springer Formation); underlies Primrose Sandstone Member (Golf Course Formation) 10. Type locality:...W1/2NW1/4NE1/4SE1/4 sec. 1, T. 3 s., R. 2 E., Carter County. Adams Formation ADMS01 1. Holocene 2. Alaska (SE) 3. McKenzie
Book (edition)
86 RELATIONS OF MINERAL DEPOSITS TO l\iINERAL SPRINGS Sumn1ary. CHAPTER VI II ORIGIN OF UNDERGROUND...waters-Examples of springs in volcanic regions- Salts of volcanic springs-The gases in volcanic springs- Rarer elements...elements in volcanic springs-The igneous en1anations. CHAPTER IX THE CHEMICAL WORK OF UNDERGROUND \\TATER...of kaolin-Metasomatic processes at Silverton, Colorado-Swnmary-Quicksilver deposits-The ores and their...Washington-Sumatra-The base-nietal veins- The San J uan region, Colorado-General features-Telluride district-Silverton
Report (volume)
Research]. Paris, France. Colorado State Univ. Agr. Expt. Sta. Gen. Ser.-Colorado State University Agricultural...Amsterdam, Netherlands. Idaho Bur. Mines and Geology Bull. Idaho Bur. Mines and Geology County Rept.Idaho Bur...Geology Bulletin and County Report and Mineral Resources Report. Moscow, Idaho. Illinois GeoL Survey...near-surface tuff on the Pajarito Plateau, Los Alamos County, New Mexico, Art. 339: .U.S. Geol. Survey Prof...Accessory bastnaesite in the Pikes Peak granite, Colorado, Art. 254: U.S. Geol. Survey Prof. Paper 424-C
 
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