Bibliography of the Geology and Mineral Resources of the Colorado Sangre de Cristo Range and Adjacent Areas

Note: This bibliography was assembled from research in the Colorado portion of the Sangre de Cristo Range. Coverage is not complete, especially for adjacent areas and New Mexico. Unpublished theses known to the author were included. Citations for work published only as abstracts were excluded.


Adrian, B. M., Arbogast, B. F., and Zimbelman, D. R., 1984, Analytical results and sample locality map of stream-sediment, heavy-mineral-concentrate, and rock samples from the Sangre de Cristo Wilderness Study Area, Saguache, Alamosa, Fremont, Custer, and Huerfano Counties, Colorado: U. S. Geological Survey Open-File Report 84-398, 115 p.

Ames, V. E., 1957, Geology of McCarty Park and vicinity, Costilla and Huerfano Counties, Colorado: unpublished M.S. Thesis, Colorado School of Mines, Golden, Colo., 122 p.

Applegate, J. K., and Rose, P. R., 1985, Structure of the Raton basin from a regional seismic line, in Gries, R. R., and Dyer, R. C., eds., Seismic exploration of the Rocky Mountain region: Rocky Mountain Association of Geologists and Denver Geophysical Society, p. 259-265.

Asquith, D. O., 1958, Geology of a portion of the Sangre de Cristo Range northwest of Cuchara Camps, Colorado, in King, R. H., ed., South-Central Colorado, Kansas Geological Society Guidebook, 22nd Field Conference, p. 132-158.

Augenbaugh, N. B., 1958, Geology of the Sangre de Cristo Mountains at Mosca and Morris Creeks, unpub. M. S. Thesis, University of Michigan, Ann Arbor, Mich., 34 p.

Baltz, E. H., 1965, Stratigraphy and history of Raton basin and notes on San Luis basin, Colorado New Mexico: American Association of Petroleum Geologists Bulletin, v. 49, no. 11, p. 2041-2075.

Baltz, E. H., 1972, Geologic map and cross sections of the Gallinas Creek area, Sangre de Cristo Mountains, San Miguel County, New Mexico: U. S. Geological Survey Miscellaneous Geologic Investigations Map I-673, scale 1:24,000.

Baltz, E. H., and Myers, D. A., 1984, Porvenir Formation (new name)--and other revisions of nomenclature of Mississippian, Pennsylvanian and Lower Permian rocks, southeastern Sangre de Cristo Mountains, New Mexico: U. S. Geological Survey Bulletin 1537-B, 39 p.

Baltz, E. H., and Myers, D. A., 1999, Stratigraphic framework of upper Paleozoic rocks, southeastern Sangre de Cristo Mountains, New Mexico, with a section on speculations and implications for regional interpretation of Ancestral Rocky Mountains paleotectonics: New Mexico Bureau of Mines and Mineral Resources Memoir 48, 272 p.

Baltz, E. H., and O'Neill, J. M., 1984, Geologic map and cross sections of the Mora River area, Sangre de Cristo Mountains, Mora County, New Mexico: U. S. Geological Survey Miscellaneous Geologic Investigations Map I-1456, scale 1:24,000.

Barrett, J. K., and Pearl, R. H., 1978, An appraisal of Colorado's geothermal resources: Colorado Geological Survey Bulletin 39, 224 p.

Becker, P. J., 1978, Middle Pennsylvanian cyclical sedimentation in the Minturn Formation of south-central Colorado: unpub. M.S. Thesis, University of Iowa, Iowa City, Iowa, 79 p.

Benson, R. G., and Jones, D. M., 1990, Geology of the San Luis gold deposit: Costilla County, Colorado: preprint, 1990 SME Annual Meeting, Salt Lake City, Utah, 9 p.

Berg, T. M., 1967, Pennsylvanian biohermal limestones of Marble Mountain, south-central Colorado: unpub. M.S. Thesis, University of Colorado, Boulder, Colo., 196 p.

Beu, R. D., 1958, Geology of the Cuchara Pass area, Colorado, in King, R. H., ed., South-Central Colorado, Kansas Geological Society Guidebook, 22nd Field Conference, p. 132-158.

Boler, F. M., Klein, D. K., and Kleinkopf, M. D., 1982, Bouguer gravity map of the Pueblo 1°X2° quadrangle, south-central Colorado: U. S. Geological Survey Miscellaneous Investigations Series Map I-1419-A, scale 1:250,000.

Bolyard, D. W., 1959, Pennsylvanian and Permian stratigraphy in Sangre de Cristo Mountains between La Veta Pass and Westcliffe, Colorado: American Association of Petroleum Geologists Bulletin, v. 43, no. 8, p. 1896-1939.

Bridwell, R. J., 1976, Lithospheric thinning and the late Cenozoic thermal and tectonic regime of the northern Rio Grande rift, in New Mexico Geological Society Guidebook, 27th Field Conference, Vermejo Park, p. 283-292.

Brill, K. G., Jr., 1952, Stratigraphy in the Permo-Pennsylvanian zeugogeosyncline of Colorado and northern New Mexico: Geological Society of America Bulletin, v. 63, no. 8, p. 809-880.

Briggs, L. I., and Goddard, E. N., 1956, Geology of Huerfano Park, Colorado, in Guide book to the geology of the Raton Basin, Colorado, Rocky Mountain Association of Geologists, p. 40-45.

Brister, B. S., and Gries, R. R., 1994, Tertiary stratigraphy and tectonic development of the Alamosa basin (northern San Luis basin), Rio Grande rift, south-central Colorado, in Keller, R. G., and Cather, S. M., eds., Basins of the Rio Grande rift: structure, stratigraphy and tectonic setting: Geological Society of America Special Paper 291, p. 39-59.

Bruce, R. M., and Johnson, B. R., 1991, Reconnaissance geologic map of the Zapata Range and Mosca Pass quadrangles, Alamosa and Huerfano Counties, Colorado: Blanca Peak Quadrangles, Alamosa, Costilla, and Huerfano Counties, Colorado: U. S. Geological Survey Miscellaneous Field Investigations Map MF-2168, scale 1:24,000.

Budding, K. E., and Lawrence, V. A., 1983, Reconnaissance geologic map of the Spanish Peaks wilderness study area, Huerfano and Las Animas Counties, Colorado: U. S. Geological Survey Miscellaneous Field Studies Map MF-1542-A, scale 1:50,000.

Burbank, W. S, and Goddard, E. N., 1937, Thrusting in Huerfano Park, Colorado, and related problems of orogeny in the Sangre de Cristo Mountains: Geological Society of America Bulletin, v. 48, no. 7, p. 931-976.

Burford, A. E., 1960, Geology of the Medano Peak area, Sangre de Cristo Mountains, Colorado: unpub. Ph.D. Thesis, University of Michigan, Ann Arbor, Mich., 201 p.

Casey, J. M., 1980, Depositional systems and paleogeographical evolution of the late Paleozoic Taos trough, northern New Mexico, in Fouch, T. D., and Magathan, E. R., eds., Paleozoic paleogeography of west-central United States; Paleogeography Symposium I: Society of Economic Paleontologists and Mineralogists, Rocky Mountain Section, p. 181-196.

Casey, J. M., and Scott, A. J., 1979, Pennsylvanian coarse-grained fan deltas associated with the Uncompahgre uplift, Talpa, New Mexico; in Ingersoll, R. V., ed., Guidebook of Santa Fe Country: New Mexico Geological Society Guidebook, 13th Annual Field Conference, p. 211-218.

Chronic, B. J., Jr., 1958, Pennsylvanian rocks in central Colorado, in Symposium on Pennsylvanian rocks of Colorado and adjacent areas: Rocky Mountain Association of Geologists, Denver, Colo., p. 59-63.

Clark, R. F., 1982, Stratigraphy, sedimentology and copper-uranium occurrences of the upper part of the Middle Pennsylvanian Minturn Formation, Sangre de Cristo Mountains, Colorado: unpub. M.S. Thesis, Colorado School of Mines, Golden, Colo., 151 p.

Clark, R. F., and Walz, D. M., 1985, Stratigraphic sections, depositional environments, and metal content of the calcareous upper part of the middle Pennsylvanian Minturn Formation, northern Sangre de Cristo Range, Custer and Saguache Counties, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-1622-D.

Clement, J. F., 1952, The geology of the northeastern Baca Grant area, Saguache County, Colorado: unpub. M.S. thesis, Colorado School of Mines, Golden, Colo., 129 p.

Coe, B. A., 1980, Geothermal energy potential in the San Luis Valley, Colorado: Colorado Geological Survey Open-file Report 80-13, 44 p.

Davis, T. L., and Stoughton, D., 1979, Interpretation of seismic reflection data from the northern San Luis Valley, south-central Colorado, in Riecker, R. E., ed., Rio Grande rift: Tectonics and magmatism: American Geophysical Union, p. 185-194.

DeVoto, R. H., and Peel, F. A., 1972, Pennsylvanian and Permian stratigraphy and structural history, northern Sangre de Cristo Range, Colorado, in DeVoto, R. H., ed., Paleozoic stratigraphy and structural evolution of Colorado: Colorado School of Mines Quarterly, v. 67, no. 4, p. 283-320.

Doeringsfeld, Amuedo, and Ivey, 1956, Structure contour map of Raton basin, in Guide book to the geology of the Raton Basin, Colorado, Rocky Mountain Association of Geologists, Denver, Colo.

Ellis, C. E., Hannigan, B. J., and Thompson, J. R., 1983, Mineral investigation of the Sangre de Cristo Wilderness Study Area, Alamosa, Custer, Fremont, Huerfano, and Saguache Counties, Colorado: U. S. Bureau of Mines Open-File Report MLA 65-83, 190 p.

Endlich, F. M., 1874, Report of F. M. Endlich, in Hayden, F. V., Progress report of exploration for the year 1873: Annual Report of the United States Geological and Geographical Survey of the Territories, embracing Colorado, p. 275-351.

Flores, R. J., 1985, Sedimentation model for the Crestone Conglomerate Member of the Sangre de Cristo Formation (Pennsylvanian-Permian), south-central Colorado: unpub. M.S. Thesis, Indiana University, Bloomington, Indiana, 146 p.

Flores, R. M., and Tur, S. M., 1982, Characteristics of deltaic deposits in the Cretaceous Pierre Shale, Trinidad Sandstone, and Vermejo Formation, Raton basin, Colorado: Mountain Geologist, v. 19, no. 2, p. 25-40.

Fouret, J. H., 1954, Geology of the central Culebra Range region, Costilla, Huerfano, and Las Animas Counties, Colorado: unpub. M.S. Thesis, Colorado School of Mines, Golden, Colo.,104 p.

Grout, M. A., 1981, Rockwall erosion in the northern Sangre de Cristo Mountains, Colorado--Contributing factors, sequence, and rate: unpub. M.S. Thesis, University of Colorado, Boulder, Colo.,166 p.

Hamilton, K. D., 1995, Petrography and diagenesis of the Whiskey Creek Pass Limestone Member, upper Madera Formation, Sangre de Cristo Mountains, south-central Colorado: unpub M.S. Thesis, University of Akron, Akron, Ohio, 137 p.

Hannigan, B. J., 1984, Mineral resource investigation of the Black Canyon, Papa Keal, Sand Castle, South Piney Creek, and Zapata Creek Wilderness Study Areas, Alamosa and Saguache Counties, Colorado: U. S. Bureau of Mines Open-File Report MLA 24-84, 35 p.

Hills, R. C., 1899, Description of the Elmoro quadrangle, Colorado: U.S. Geological Survey Geologic Atlas, Folio 58.

Hills, R. C., 1900, Description of the Walsenburg Quadrangle, Colorado: U.S. Geological Survey Geologic Atlas, Folio 68.

Johnson, B. R., and Bruce, R. M., 1991, Reconnaissance geologic map of parts of the Twin Peaks and Blanca Peak quadrangles, Alamosa, Costilla, and Huerfano Counties, Colorado: U. S. Geological Survey Miscellaneous Field Investigations Map MF-2169, scale 1:24,000.

Johnson, B. R., Bruce, R. M., and Lindsey, D. A., 1989, Reconnaissance geologic map of the Medano Pass quadrangle and part of the Liberty Quadrangle, Alamosa, Huerfano, and Saguache Counties, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-2089, scale 1:24,000.

Johnson, B.R., Lindsey, D.A., Bruce, R.M., and Soulliere, S.J., 1987, Geologic map of the Sangre de Cristo Wilderness study area, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-1635-B, scale 1:62,500.

Johnson, B. R., Lindsey, D. A., Ellis, C. E., Hannigan, B. J., and Thompson, J. R., 1984, Mineral resource potential of the Sangre de Cristo Wilderness Study Area, south-central Colorado: U. S. Geological Survey Miscellaneous Field Studies Map MF-1635-A, 2 sheets and pamphlet, scale 1:62,500.

Johnson, J. H., 1929, Contribution to the geology of the Sangre de Cristo Mountains of Colorado: Colorado Scientific Society Proceedings, v. 12, no. 1, p. 1-21.

Johnson, R. B., 1959, Geology of the Huerfano Park area, Huerfano and Custer Counties, Colorado: U.S. Geological Survey Bulletin 1071-D, p. C87-C119.

Johnson, R. B., 1962, The Ralston Creek (?) Formation of Late Jurassic age in the Raton Mesa region and Huerfano Park, south-central Colorado: U. S. Geological Survey Professional Paper 450-C, p. C49-C54.

Johnson, R. B., 1968, Geology of the igneous rocks of the Spanish Peaks region, Colorado, in Shorter contributions to general geology, U. S. Geological Survey Professional Paper 594-G, p. G1-G47.

Johnson, R. B., 1969, Geologic map of the Trinidad quadrangle, south-central Colorado: U. S. Geological Survey Miscellaneous Geologic Investigations Map I-558, scale 1:250,000.

Johnson, R. B., and Stephens, J. G., 1954, Geology of the La Veta area, Huerfano County, Colorado: U.S. Geological Survey Oil and Gas Investigations Map OM-146, scale 1:31,680.

Johnson, R. B., and Stephens, J. G., 1954, Coal resources of the La Veta area, Huerfano County, Colorado: U.S. Geological Survey Coal Investigations Map C-20, scale 1:31,680.

Johnson, R. B., and Wood, G. H., Jr., 1956, Stratigraphy of Upper Cretaceous and Tertiary rocks of Raton basin, Colorado and New Mexico: American Association of Petroleum Geologists Bulletin, v. 40, no. 4, p. 707-721.

Johnson, R. B., Wood, G. H., Jr., and Harbour, R. L., 1958, Preliminary geologic map of the Raton Mesa Region and Huerfano Park in parts of Las Animas, Huerfano, and Custer Counties, Colorado: U.S. Geological Survey Oil and Gas Investigations Map OM-183, scale 1:63,360.

Karig, D. E., 1964, Structural analysis of the Sangre de Cristo Range, Venable Peak to Crestone Peak, Custer and Saguache Counties, unpub. M.S. thesis, Colorado School of Mines, Golden, Colo.,143 p.

Karig, D. E., 1964, Tertiary regional metamorphism in the Sangre de Cristo Range, Colorado: Mountain Geologist, v. 1, no. 1, p. 59-66.

Kearney, B. C., 1983, Volcanic stratigraphy and structure of the La Veta Pass area, northern Sangre de Cristo Mountains, south-central Colorado: unpub. M.S. Thesis, Southern Methodist University, Dallas, Texas, 67 p.

Keller, G. R., Cordell, L., Davis, G. H., Peeples, W. J., and White, G., 1984, A geophysical study of the San Luis basin, in Sanford, A.R., ed., Rio Grande rift: northern New Mexico, New Mexico Geological Society, p. 51-58.

Kelley, S. A., and Duncan, I. J., 1984, Tectonic history of the northern Rio Grande rift derived from apatite fission-track geochronology, in Baldridge, W. S., Dickerson, P. W., Riecker, R. E., and Zidek, J., eds., Rio Grande Rift: northern New Mexico, New Mexico Geological Society Guidebook, 35th Annual Field Conference, p. 67-73.

Kelley, S. A., Chapin, C. E., and Corrigan, J., 1992, Late Mesozoic and Cenozoic cooling histories of the flanks of the northern and central Rio Grande rift, Colorado and New Mexico: New Mexico Bureau of Mines and Mineral Resources Bulletin 145, 39 p.

Kelly, J. C., 1994, Deformation mechanism adjacent to a thrust, Sangre de Cristo Range, Colorado: unpub. M. S. Thesis, University of Akron, Akron, Ohio, 116 p.

Kleinkopf, M. D., Peterson, D. L., and Johnson, R. B., 1970, Reconnaissance geophysical studies of the Trinidad quadrangle, south-central Colorado, in Geological Survey Research 1970: U. S. Geological Survey Professional Paper 700-B, p. B78-B85.

Kluth, C. F., and Schaftenaar, C. H., 1994, Depth and geometry of the northern Rio Grande rift in the San Luis basin, south-central Colorado, in Keller, G. R., and Chapin, S. M., eds, Basins of the Rio Grande rift: structure stratigraphy and tectonic setting: Geological Society of America Special Paper 291, p 27-38.

Knepper, D. H., Jr., and Maars, R. W., 1971, Geological development of the Bonanaza-San Luis Valley-Sangre de Cristo Range area, south-central Colorado, in James, H. L., ed., San Luis Basin: New Mexico Geological Society 22nd Field Conference Guidebook, p. 249-264.

Koch, R. W., 1963, A structural study of the Venable Peak region of the Sangre de Cristo Range, Colorado: unpub. M.S. Thesis, Colorado School of Mines, Golden, Colo., 131 p.

Lindsey, D.A., 1986, Log for joint SEPM-Colorado Scientific Society field trip from Westcliffe to Crestone, Colorado, September 20-21, 1986: Late Paleozoic sedimentation and Laramide tectonics of the Sangre de Cristo Range: U.S. Geological Survey Open-File Report 86-0542, 26 p.

Lindsey, D. A., 1995, Geologic map of the McCarty Park quadrangle, Costilla and Huerfano Counties, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-2282, scale 1:24,000.

Lindsey, D. A., 1995, Geologic map of the Cuchara quadrangle, Huerfano County, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-2283, scale 1:24,000.

Lindsey, D. A., 1996, Reconnaissance geologic map of the Cucharas Pass quadrangle, Huerfano and Las Animas Counties, Colorado: U. S. Geological Survey Miscellaneous Field Studies Map MF-2294, scale 1:24,000.

Lindsey, D. A., 1998, Laramide structure of the central Sangre de Cristo Mountains and adjacent Raton basin, southern Colorado: Mountain Geologist, v. 35, no. 2, p. 55-70.

Lindsey, D. A., 2000, Petrology of arkosic sandstones, Pennsylvanian Minturn Formatin and Pennsylvanian and Permian Sangre de Cristo Formation, Sangre de Cristo Range, Colorado--data and preliminary interpretations: U. S. Geological Survey Open-File Report 00-474, 45 p. (Available at <http://greenwood.cr.usgs.gov/pub/open-file-reports/ofr-00-0474/>).

Lindsey, D.A., Andriessen, P.A.M., and Wardlaw, B.R., 1986, Heating, cooling, and uplift during Tertiary time, northern Sangre de Cristo Range, Colorado: Geological Society of America Bulletin, v. 97, no. 9, p. 1133-1143.

Lindsey, D. A., and Clark, R. F., 1995, Copper and uranium in Pennsylvanian and Permian sedimentary rocks, northern Sangre de Cristo Range, Colorado: U.S. Geological Survey Bulletin 2116, 23 p.

Lindsey, D. A., Clark, R. F., and Soulliere, S. J., 1985, Reference section for the Minturn Formation (Middle Pennsylvanian), northern Sangre de Cristo Range, Custer and Saguache Counties, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-1622-C.

Lindsey, D. A., Clark, R. F., and Soulliere, S. J., 1986, Minturn and Sangre de Cristo Formations of southern Colorado--a prograding fan-delta and alluvial-fan sequence shed from the Ancestral Rocky Mountains, in Peterson, J. A., ed., Paleotectonics and sedimentation in the Rocky Mountain region, U. S.: American Association of Petroleum Geologists Memoir 41, p. 541-561.

Lindsey, D.A., Hassemer, J.R., Abrams, G.A., Taylor, R.B., and Hannigan, B.J., 1985, Mineral Resources of the Black Canyon and South Piney Creek Wilderness Study Areas, Saguache County, Colorado: U.S. Geological Survey Bulletin 1716-A, 15 p.

Lindsey, D. A., Johnson, B. R., and Andriessen, P. A. M., 1983, Laramide and Neogene structure of the northern Sangre de Cristo Range, south-central Colorado, in Lowell, J. A., ed., Rocky Mountain Foreland Basins and Uplifts: Denver, Rocky Mountain Association of Geologists, p. 219-228.

Lindsey, D.A., Johnson, B.R., Soulliere, S.J., Bruce, R.M., and Hafner, K., 1986, Geologic map of the Beck Mountain, Crestone Peak, and Crestone quadrangles, Custer, Huerfano, and Saguache Counties, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-1878, scale 1:24,000.

Lindsey, D. A., and Schaefer, R. A., 1984, Principal reference section for the Sangre de Cristo Formation (Pennsylvanian and Permian), northern Sangre de Cristo Range, Saguache County, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-1622-A.

Lindsey, D. A., Scott, G. R., Soulliere, S. J., and DeAngelis, B. L., 1984, Geologic map of the Horn Peak quadrangle, Custer and Saguache Counties, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-1623, scale 1:24,000.

Lindsey, D.A., and Soulliere, S.J., 1987, Geologic map and sections of the Valley View Hot Springs quadrangle, Custer and Saguache Counties, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-1942, scale 1:24,000.

Lindsey, D. A., Soulliere, S. J., and Hafner, K., 1985, Geologic map of Electric Peak and southwestern part of Beckwith Mountain quadrangles, Custer and Saguache Counties, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-1786, scale 1:24,000

Lindsey, D.. A., Soulliere, S. J., Hafner, K., and Flores, R. J., 1985, Geologic map of Rito Alto Peak and northeastern part of Mirage quadrangles, Custer and Saguache Counties, Colorado: U. S. Geological Survey Miscellaneous Field Studies Map MF-1787.

Lipman, P. W., and Mehnert, H. H., 1975, Late Cenozoic basaltic volcanism and development of the Rio Grande depression in the southern Rocky Mountains, in Curtis, B. F., ed., Cenozoic history of the southern Rocky Mountains: Geological Society of America Memoir 144, p. 119-154

Litsey, L. R., 1958, Stratigraphy and structure of the northern Sangre de Cristo Mountains, Colorado: Geological Society of America Bulletin, v. 69, no. 9, p. 1143-1178.

Mallory, W. W., 1972, Pennsylvanian arkose and the Ancestral Rocky Mountains, in Mallory, W. W. ed., Geologic Atlas of the Rocky Mountain Region: Rocky Mountain Association of Geologists, Denver, Colo., p. 131-132.

Marvin, R. F., Young, E. J., Mehnert, H. H., and Naeser, C. W., 1974, Summary of radiometric age determinations on Mesozoic and Cenozoic igneous rocks and uranium and base metal deposits in Colorado: Isochron/West, no. 11, 41 p.

McCalpin, J. P., 1982, Quaternary geology and neotectonics of the west flank of the northern Sangre de Cristo Mountains, south-central Colorado: Colorado School of Mines Quarterly, v. 77, no. 3, 97 p.

McConnell, D. A., and Wilson, T. G., 1993, Linkage between deformation of basement rocks and sedimentary rocks in basement-involved foreland folds, in Schmidt, C. J., Chase, R. B., and Erslev, E. A., eds., Laramide basement deformation in the Rocky Mountain foreland of the western United States: Geological Society of America Special Paper 280, p. 319-333.

Melton, F. A., 1925, Correlation of Permo-Carboniferous red beds in southwestern Colorado and northern New Mexico: Journal of Geology, v 33, no. 8, p. 807-815.

Miller, J. P., Montgomery, A., and Sutherland, P. K., 1963, Geology of part of the southern Sangre de Cristo Mountains, New Mexico: New Mexico Bureau of Mines and Mineral Resources Memoir 11, 106 p.

Moore, C. H., 1981, Geology and petrology of the Mosca Pass area, Sangre de Cristo Mountains, Colorado: unpub. M. S. Thesis, University of Akron, Akron, Ohio, 72 p.

Morgan, P., and Golombek, M. P., 1984, Factors controlling the phases and styles of extension in the northern Rio Grande rift, in Baldridge, W. S., Dickerson, P. W., Riecker, R. E., and Zidek, J., eds., Rio Grande Rift: northern New Mexico, New Mexico Geological Society Guidebook, 35th Annual Field Conference, p. 13-19.

Munger, R. D., 1959, Geology of the Spread Eagle Peak area, Sangre de Cristo Mountains, Colorado: unpub. M.S. Thesis, University of Colorado, Boulder, Colo.,137 p.

Munger, R. D., 1965, Structural geology of the Spread Eagle Peak area, Sangre de Cristo Mountains, Colorado: Mountain Geologist, v. 2, no. 1, p. 3-21.

Nelson-Moore, J. L., Collins, D. B., and Hornbaker, A. L., 1978, Radioactive mineral occurrences of Colorado: Colorado Geological Survey Bulletin 40, 1054 p.

Nolting, R. M., 3rd, 1970, Pennsylvanian-Permian stratigraphy and structural history of the Orient-Cotton Creek area, Sangre de Cristo Mountains, Colorado: unpub. M.S. thesis, Colorado School of Mines, Golden, Colo.,102 p.

Penn, B. S., 1994, An investigation of the temporal and geochemical characteristics, and the petrogenetic origins of the Spanish Peaks intrusive rocks of south-central Colorado: unpub. Ph.D. thesis, School of Mines, Golden, Colo.,199 p.

Penn, B. S., and Lindsey, D. A., 1996, Tertiary igneous rocks and Laramide structure and stratigraphy of the Spanish Peaks region, south-central Colorado: road log and descriptions from Walsenburg to La Veta (first day) and La Veta to Aguilar (second day), in Thompson, R.A., Hudson, M. R., and Pillmore, C.L., eds., Geologic excursions to the Rocky Mountains and beyond, Field Trip Guidebook for the 1996 Annual Meeting, Geological Society of America, Denver, Colorado, October 28-31: Colorado Geological Survey Special Publication 44, unpaginated (CD ROM).

Petersen, R. C., 1971, Glaciation in the Sangre de Cristo Range, Colorado, in James, H. L., ed., San Luis basin, New Mexico Geological Society 22nd Field Conference Guidebook, p. 165-168.

Pillmore, C. L., 1969, Geologic map of the Casa Grande quadrangle, Colfax County, New Mexico, and Las Animas County, Colorado: U. S. Geological Survey Map GQ-823, scale 1:62,500.

Pillmore, C. L., 1969, Geology and coal deposits of the Raton coal field: Mountain Geologist, v. 6, no. 3, p. 125-142.

Pillmore, C. L., and Eicher, D. L., 1976, Lower part of the marine Cretaceous at Gold Creek, Vermejo Park, New Mexico, in Ewing, R. C., and Kues, B. S., eds., Guidebook of Vermejo Park, New Mexico Geological Society Guidebook, 27th Field Conference, p. 171-176.

Pillmore, C. L., and Maberry, J. O., 1976, Depositional environments and trace fossils of the Trinidad Sandstone, southern Raton basin, New Mexico, in Ewing, R. C., and Kues, B. S., eds., Guidebook of Vermejo Park, New Mexico Geological Society Guidebook, 27th Field Conference, p. 191-195.

Pillmore, C. L., and Scott, G. R., 1976, Pediments of the Vermejo Park area, New Mexico, in Ewing, R. C., and Kues, B. S., eds., Guidebook of Vermejo Park, New Mexico Geological Society Guidebook, 27th Field Conference, p. 111-120.

Pillmore, C. L., and Flores, R. M., 1990, Cretaceous and Paleocene rocks of the Raton basin, New Mexico and Colorado--stratigraphic-environmental framework, in Bauer, P. W., Lucas, S. G., Mawer, C. K., and McIntosh, W. T., eds., Tectonic development of the southern Sangre de Cristo Mountains, New Mexico Geological Society Guidebook, 41st Field Conference, p. 333-336.

Reiter, M., Shearer, C., and Edwards, C. L., 1978, Geothermal anomalies along the Rio Grande rift in New Mexico: Geology, v. 6, no. 2, p. 85-88.

Reynolds, T. B., 1983, Geology and regional tectonic significance of Blanca Peak area, Huerfano County, Colorado: unpub M. S. Thesis, Wichita State University, Wichita, Kansas, 160 p.

Rhodes, J. A., 1964, Stratigraphy and origin of the Pennsylvanian-Permian rocks of the Huerfano Park quadrangle, Colorado: unpub. Ph.D. Thesis, University of Michigan, Ann Arbor, Mich., 176 p.

Robinson, P. 1966, Fossil mamallia of the Huerfano Formation, Eocene, Colorado: Peabody Museum of Natural History Bulletin 21, Yale University, New Haven, 95 p.

Rose, P. R., Everitt, J. R., and Merin, I. S., 1984, Possible basin centered gas accumulation, Raton basin, southern Colorado: Oil and Gas Journal, v. 82, no. 40, p. 190-197.

Ross, R. J., Jr., and Tweto, O., 1980, Lower Paleozoic sediments and tectonics in Colorado, in Kent, H. C., and Porter, K. W., eds., Colorado Geology, Rocky Mountain Association of Geologists, Denver, Colo., p. 47-56.

Samsela, J. J., Jr., 1980, Sedimentology of the Leadville Limestone (Mississippian) and the Chaffee Group (Upper Devonian), Chaffee, Fremont, and Saguache Counties, Colorado: unpub. M. S. Thesis, Colorado School of Mines, Golden, Colo., 168 p.

Schavran, G. A., 1984, Structural features of a Laramide fold and thrust belt, east flank of the Sangre de Cristo Range, Colorado: unpub. M.S. Thesis, Colorado School of Mines, Golden, Colo., 67 p.

Schavran, G. A., 1985, Structural features in the Huerfano Park area, east flank, Sangre de Cristo Range, Colorado: Mountain Geologist, v. 22, no. 1, p. 33-39.

Scott, G. R., 1970, Quaternary faulting and potential earthquakes in east-central Colorado, in Geological Survey Research 1970: U. S. Geological Survey Professional Paper 700-C, p. C11-C18.

Scott, G. R., 1975, Cenozoic surfaces and deposits in the southern Rocky Mountains, in Curtis, B. F., ed., Cenozoic history of the southern Rocky Mountain region: Geological Society of America Memoir 144, p. 227-248.

Scott, G. R., and Taylor, R. B., 1974, Reconnaissance geologic map of the Electric Peak quadrangle, Custer and Saguache Counties, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-628, scale 1:62,500.

Scott, G. R., and Taylor, R. B., 1975, Post-Paleocene Tertiary rocks and Quaternary volcanic ash of the Wet Mountain Valley, Colorado: U.S. Geological Survey Professional Paper 868, 15 p.

Scott, G. R., Taylor, R. B., Epis, R. C., and Wobus, R. A., 1978, Geologic map of the Pueblo 1°x2° quadrangle, south-central Colorado: U. S. Geological Survey Miscellaneous Investigations Series Map I-1022, scale 1:250,000.

Sharp, W. N., 1978, Geologic map of the Silver Cliff and Rosita volcanic centers, Custer County, Colorado: U. S. Geological Survey Miscellaneous Investigations Series Map I-1081, scale 1:24,000.

Siebenthal, C. E., 1907, Notes on the glaciation of the Sangre de Cristo Range, Colorado: Journal of Geology, v. 15, p. 15-22.

Smith, R. P., 1978, Geologic maps of part of the Spanish Peaks dike system, south-central Colorado: Geological Society of America Map and Chart Series MC-22, 2 p.

Soulliere, S. J., DeAngelis, B. L., and Lindsey, D. A., 1984, Measured sections and discussion of the main turbidite member, Minturn Formation (Middle Pennsylvanian), northern Sangre de Cristo Range, Custer and Saguache Counties, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-1622-B.

Stone, J. B., 1934, Limonite deposits at the Orient Mine, Colorado: Economic Geology, v. 24, no. 4, p. 317-329.

Swanberg, C. A., 1983, Geothermal resources of rifts: a comparison of the Rio Grande rift and the Salton trough, in Morgan, P., and Baker, B. H. eds., Processes of Continental Rifting: Developments in Geotectonics 19, Elsevier, New York, p. 659-678.

Tandon, K., Brown, L., and Hearn, T., 1999, Deep structure of the northern Rio Grande rift beneath the San Luis basin (Colorado) from a seismic reflection survey: implications for rift evolution: Tectonophysics, v. 302, p. 41-56.

Taylor, R. B., 1975, Neogene tectonism in south-central Colorado, in Curtis, B. F. ed., Cenozoic history of the southern Rocky Mountains, Geological Society of America Memoir 144, p. 211- 226.

Taylor, R. B., Scott, G. R., and Wobus, R. A., 1975, Reconnaissance geologic map of the Howard quadrangle, central Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-892, scale 1:62,500.

Taylor, R. B., Scott, G. R., and Wobus, R. A., 1975, Reconnaissance geologic map of the Howard quadrangle, central Colorado: U. S. Geological Survey Miscellaneous Investigations Series Map I-892, scale 1:62,500.

Taylor, R. B., Scott, G. R., Wobus, R. A., and Epis, R. C., 1975, Reconnaissance geologic map of the Cotopaxi 15-minute quadrangle, Fremont and Custer Counties, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-900, scale 1:62,500.

Taylor, R. B., Stoneman, R. J., and Marsh, S. P., 1984, An assessment of the mineral resource potential of the San Isabel National Forest, south-central Colorado: U. S. Geological Survey Bulletin 1638, 42 p.

Tischler, H., 1961, The Pennsylvanian and Permian stratigraphy of the Huerfano Park area, Colorado: unpublished Ph.D. Thesis, University of Michigan, Ann Arbor, Mich., 200 p.

Tischler, H., 1963, Fossils, faunal zonation, and depositional environment of the Madera Formation, Huerfano Park, Colorado: Journal of Paleontology, v. 37, no. 5, p. 1054-1068.

Toulmin, P., III, 1953, Petrography and petrology of the Rito Alto stock, Custer and Saguache Counties, Colorado: unpub. M.S. Thesis, University of Colorado, Boulder, Colo., 49 p.

Tweto, Ogden, 1975, Laramide (Late Cretaceous-Early Tertiary) orogeny in the southern Rocky Mountains, in Curtis, B. F., ed., Cenozoic history of the southern Rocky Mountains: Geological Society of America Memoir 144, p. 1-44.

Tweto, Ogden, 1979, The Rio Grande rift system in Colorado, in Riecker, R. E., ed., Rio Grande rift: tectonics and magmatism: American Geophysical Union, Washington, D. C., p. 33-56.

U. S. Geological Survey, 1983, Aeromagnetic map of the Sangre De Cristo Mountains, Colorado: U. S. Geological Survey Open-file map 83-0060, 3 sheets, scale 1:62,500.

Utada, M., and Vine, J. D., 1984, Zonal distribution of zeolites and authigenic plagioclase, Spanish Peaks region, southern Colorado, in Olson, D., and Bislo, A.. eds., Proceedings of the Sixth International Zeolite Conference, London, Butterworths, p. 604-615.

Vaughn, P. P., 1972, More vertebrates, including a new microsaur, from the upper Pennsylvanian of central Colorado: Los Angeles County Museum Contributions to Science, no. 223, p. 1-29.

Vine, J. D., 1974, Geologic map and cross sections of the La Veta Pass, La Veta, and Ritter Arroyo quadrangles, Huerfano and Costilla Counties, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-833, scale 1:48,000.

Volckmann, R. P., 1965, Geology of the Crestone Peak area, Sangre de Cristo Range, Colorado: unpub. Ph.D. Thesis, University of Michigan, Ann Arbor, Mich., 115 p.

Wallace, A. R., 1995, Cenozoic rift-related sedimentation and faulting, northern Culebra Range, southern Colorado: New Mexico Geological Society Guidebook, 46th Field Conference, Geology of the Santa Fe region, p. 147-154.

Wallace, A. R., 1996, Geologic map of the Trinchera Ranch quadrangle, Costilla County, Colorado: U. S. Geological Survey Miscellaneous Field Studies Map MF-2312-C, scale 1:24,000.

Wallace, A. R., 1996, Geologic map of the Russell quadrangle, Costilla County, Colorado: U. S. Geological Survey Miscellaneous Field Studies Map MF-2312-D, scale 1:24,000.

Wallace, A. R., 1996, Geologic map of the Ft. Garland quadrangle, Costilla County, Colorado: U. S. Geological Survey Miscellaneous Field Studies Map MF-2312-E, scale 1:24,000.

Wallace, A. R., and Lindsey, D. A., 1996, Geologic map of the Trinchera Peak quadrangle, Costilla, Huerfano, and Las Animas Counties, Colorado: U. S. Geological Survey Miscellaneous Field Studies Map MF-2312-A, scale 1:24,000.

Wallace, A. R., and Soulliere, S. J., 1996, Geologic map of the Ojito Peak quadrangle, Costilla County, Colorado: U. S. Geological Survey Miscellaneous Field Studies Map MF-2312-B, scale 1:24,000.

Watkins, T. A., 1996, Geology of the northeastern San Luis basin, Saguache County, Colorado, in Thompson, R.A., Hudson, M. R., and Pillmore, C.L., eds., Geologic excursions to the Rocky Mountains and beyond, Field Trip Guidebook for the 1996 Annual Meeting, Geological Society of America, Denver, Colorado, October 28-31: Colorado Geological Survey Special Publication 44, unpaginated (CD-ROM).

Webster, R. J., 2000, Kinematic analysis and structural style of the Mosca Creek window, west side of the Sangre de Cristo Mountains, Alamosa County, Colorado: unpub. M.S. Thesis, Wichita State University, Wichita, Kansas,164 p.

Wood, G. H., Jr., Johnson, R. B., and Dixon, G. H., 1956, Geology and coal resources of the Gulnare, Cuchara Pass, and Stonewall area, Huerfano and Las Animas Counties, Colorado: U. S. Geological Survey Coal Investigations Map C-26, scale 1:31,680.