Barton, W. R., 1968, Dimension Stone: U.S. Bureau of Mines Information Circular 8391, 147 p. REFERENCES CITED Bowles, Olver, 1958, <strong>Marble</strong>: U.S. Bureau of Mines Information Circular 7829, 31 p. Bryant, Bruce, 1966, Possible window in the Elk Range thrust sheet near Aspen, <strong>Colorado</strong>: U.S. <strong>Geological</strong> <strong>Survey</strong> Professional Paper 550-D, p. D1-D8. , _,1969, Geologic map of the Maroon Bells Quadrangle, Pitkin and Gunnison Counties, <strong>Colorado</strong>: U.S. <strong>Geological</strong> <strong>Survey</strong> <strong>Geological</strong> Quadrangle Map GQ-788, scale 1:24,000. , 1970, Geologic map of the Hayden Peak Quadrangle, Pitkin and Gunnison Counties, <strong>Colorado</strong>: U.S. <strong>Geological</strong> <strong>Survey</strong> Geologic Quadrangle Map GQ-863, scale 1:24,000. , 1971a, Geologic map of the Aspen Quadrangle, Pitkin County, <strong>Colorado</strong>: U.S. <strong>Geological</strong> <strong>Survey</strong> Geologic Quadrangle Map GQ-933, scale 1:24,000. , 1971b, Disseminated sulfide deposits in the eastern Elk Mountains, <strong>Colorado</strong>, in <strong>Geological</strong> <strong>Survey</strong> research 1971: U.S. <strong>Geological</strong> <strong>Survey</strong> Professional Paper 750-D, p. D13-D25. , 1972a, Geologic map of the Highland Peak Quadrangle, Pitkin County, <strong>Colorado</strong>: U.S. <strong>Geological</strong> <strong>Survey</strong> Geologic Quadrangle Map GQ-932, scale 1:24,000. , 1972b, Map showing mines, prospects, and areas of significant silver, lead, and zinc production in the Aspen Quardrangle, Pitkin County, <strong>Colorado</strong>: U.S. <strong>Geological</strong> <strong>Survey</strong> Miscellaneous Geologic Investigations Map I-785-D, scale 1:24,000 Bryant, Bruce, 1979, Geology of the Aspen 15- Minute Quadrangle, Pitkin and Gunnison Counties, <strong>Colorado</strong>: U.S. <strong>Geological</strong> <strong>Survey</strong> Professional Paper 1073,145 p. <strong>Colorado</strong> <strong>Geological</strong> <strong>Survey</strong> <strong>Colorado</strong> Avalanche Information Center, 1989, Snow and Avalanche—Annual Report, 1988-1989: <strong>Colorado</strong> <strong>Geological</strong> <strong>Survey</strong> Information Series 29, 48 p. Dietrich, R. V. and Skinner, B. J., 1979, Rocks and rock minerals: New York, John Wiley, 319 p. Hayden, F. V, 1874, Sawatch Range—Morainal deposits of Taylor's Creek-Elk Mountains; Chapter 3 of Hayden, F. V, Geology, Mineralogy, and Mining Industry, pt. 1 in Seventh Annual Report of the U.S. <strong>Geological</strong> and Geographical <strong>Survey</strong> of the Territories for the Year 1872: Washington, U.S. Government Printing Office, p. 53-69. , 1876, General view of the geography and geology of the Elk Mountains—Eruptive granites—RhyoHtes and dikes—Erosion on a grand scale—Local drift deposits, Chapter 5 of Hayden, F. V, Geology, Mineralogy, and Mining Industry, in Eighth Annual Report of theU.S. <strong>Geological</strong> and Geolographicl <strong>Survey</strong> of the Territories for the Year 1874: Washington, U.S. Government Printing Office, p. 54-58. Henderson, C. W, 1926, Mining in <strong>Colorado</strong>, a history of discovery, development, and discovery: U.S. <strong>Geological</strong> <strong>Survey</strong> Professional Paper 138, 263 p. 41
Holmes, W. H., 1876, Report on the Geology of the northwestern portion of the Elk Range, Chapter 6, ofReport of F. V. Hayden, U.S. Geologist, in Hayden, F. V, Eighth Annual Report of the U.S. <strong>Geological</strong> and Geographical <strong>Survey</strong> of the Territories for the Year 1874: Washington, U.S. Government Printing Office, p. 59-71. ton, U.S. Government Printing Office, p. 247-266. Rocky Mountain News, February 25,1912, Conundrum Gulch Gives Up Great <strong>Marble</strong> Deposits: Denver, <strong>Colorado</strong>. Stermole, F. J., and Stermole, J.M., 1987, E omic Evaluation and Investment Decision <strong>Marble</strong> Institute of America, 1985, Dimension methods: Golden, <strong>Colorado</strong>, Investment al Stone—Design Manual III: Farmington, Evaluations Corporation, 477 p. Michigan, 1987. Thrush, P. W. and others, ed., 1968, A dicti Peale, A. 0,1874, Gunnison River, Elk Moun ary of mining, mineral, and related terms: tains, Roaring Fork, Chapter 4 of Hayden, F. Bureau of Mines, 1269 p. V, Geology, mineralogy, and mining industry, pt. 1 of Seventh Annual Report of the Vandenbusche, D., and Myers, R, 1970, Mar U.S. <strong>Geological</strong> and Geographical <strong>Survey</strong> of ble, <strong>Colorado</strong>: City of Stone: Denver, Color the Territories for the Year 1872: Washingado, Golden Bell Press, 1970, 221 p.
- Page 1 and 2: CGS LII Open-File Report 90-2 Geolo
- Page 4 and 5: EXECUTIVE SUMMARY *. .....1 INTRODU
- Page 6 and 7: The Colorado Geological Survey (CGS
- Page 8 and 9: night can be more pronounced in win
- Page 10 and 11: GEOLOGIC CHARACTERIZATION INVESTIGA
- Page 12 and 13: content. A Geometries GS 101A scint
- Page 14 and 15: ock unit known as the Molas Formati
- Page 16 and 17: contain galena, sphalerite, and cha
- Page 18 and 19: 6? J® •—y "iff i &-m*--&-.~s I
- Page 20 and 21: EXPLANATION Upper Tertiary volcanic
- Page 22 and 23: closing of the Midnight Mine near R
- Page 24 and 25: o o o o o o o o a. o» o o CO o> o
- Page 26 and 27: o o o o o o © o OS OS o o 00 OS o
- Page 28 and 29: the greatest potential for gold. Th
- Page 30 and 31: The economic evaluation for the Col
- Page 32 and 33: Country of Origin Italy Spain Greec
- Page 34 and 35: quarries, may be nothing more than
- Page 36 and 37: White Marble (Pbwm) White marble is
- Page 38 and 39: Textbook, Economic Evaluation and I
- Page 40 and 41: the end of the year taken. The prod
- Page 42 and 43: increase back support costs. A 20 f
- Page 44 and 45: The CGS has determined that the occ
- Page 48 and 49: APPENDIX A Description of Rock Samp
- Page 50 and 51: contains inclusions of dark gray cl
- Page 52 and 53: dote, is tightly cemented by silica
- Page 54 and 55: (67) Quartzite, dark greenish gray
- Page 56 and 57: INDIANA DEPARTMENT OF NATURAL RESOU
- Page 58 and 59: DIRS 120 INDIANA DEPARTMENT OF NATU
- Page 60 and 61: SKYLINE LABS, INC. SPECIALISTS - EX
- Page 62 and 63: SKYLINE LABS, INC. SPECIALISTS IN E
- Page 64 and 65: ALLIED ENVIRONMENTAL SERVICES, INC.
- Page 66 and 67: Designers Tile and Marble, 1928 Eas
- Page 68 and 69: U.S. Bureau of Mines, Washington, D
- Page 70 and 71: Title: Four months production Proje
- Page 72 and 73: Title: Five month production with T
- Page 74 and 75: (Title: Five months production Proj
- Page 76 and 77: Title: Six months production with T
- Page 78 and 79: Production Calculations Cubic Feet
- Page 80 and 81: Tile Blocks Assume: 1) from broken
- Page 82 and 83: large samples of geologic material: