The Eastern San Juan Mountains: Their Ecology, Geology, and Human History

Glossary

Map 16.20 Chromo (POI 110–113) Figure 16.30 POI 111. V-rock, eroded from Tertiary intrusive rock e a S t e r n S a n J u a n M o u n ta i n S p o i n t S o f i n t e r e S t G u i d e 295 112. (mp 16.4) Dike from bridge over the Rio Blanco is visible to the west and forms a prominent wall that cuts through the Mancos Shale (figure 16.31). 113. (mp 17.5) Dike is visible in the road cut to the northeast. Dozens of these northeast-trending Tertiary dikes are visible from satellite imagery, suggesting crustal extension across this region, perhaps coinciding with the evolution of the Rio Grande Rift and the San Luis Valley. 114. (mp 28) Intersection of US 84 and US 160. Pagosa Springs is to the west and Wolf Creek Pass and South Fork are to the east. End of road log. reFerenCeS Atwood, W. W., and K. F. Mather. 1932. Physiography and Quaternary Geology of the San Juan Mountains, Colorado. Professional Paper 166. Washington, DC: US Geological Survey. Axelrod, D. I. 1987. The Late Oligocene Creede Flora. Publications in Geological Science 130. Berkeley: University of California. Baars, D. L. 1992. The American Alps. Albuquerque: University of New Mexico Press. Bailey, D. P. 2003. Solving the American West’s Greatest Mystery: Was Alferd Packer Innocent of Murder? Pathways Magazine 1–6. Barrett, J. K., and R. H. Pearl. 1976. Hydrogeological Data of Thermal Springs and Wells in Colorado. Information Series 6. Denver: Colorado Geological Survey. Benson, L., R. Madole, G. Landis, and J. Gosse. 2005. New Data for Late Pleistocene Pinedale Glaciation from Southwestern Colorado. Quaternary Science Reviews 24:49–65. Figure 16.31 POI 112. Intrusive dike exposed to west Rob Blair, Hobey Dixon, Kimberlee Miskell-Gerhardt, Mary Gillam, and Scott White 296 Burroughs, R. L., and A. P. Butler. 1971. Third Day Rail Log Antonito, Colorado to Chama, New Mexico. In H. L. James, ed., Guidebook of the San Luis Basin, Colorado. New Mexico Geological Society, no city given, 43–100. Coe, J.A.,W.L.Ellis,J.W.Godt,W.Z.Savage,J.E.Savage,J.A.Michael,J.D.Kibler, P.S. Powers, D. J. Lidke, and S. Debray. 2003. Seasonal Movement of the Slumgullion Landslide Determined from Global Positioning System Surveys and Field Instrumentation, July 1998–March 2002. Engineering Geology 68(1–2):67–101. Coe, J. A., J. W. Godt, W. L. Ellis, W. Z. Savage, P. S. Powers, D. J. Varnes, and P. Tachker. 2000. Preliminary Interpretation of Seasonal Movement of the Slumgullion Landslide as Determined from GPS Observation July 1998–July 1999. US Geological Survey OpenFile Report 00-102 (on-line edition). Condon, S. J. 1990. Geologic and Structure Contour Map of the Southern Ute Indian Reservation and Adjacent Areas, Southwest Colorado and Northwest New Mexico. US Geological Survey Map I–1958. Dane, C. H. 1960. Early Explorations of Rio Arriba County, New Mexico, and Adjacent Parts of Southern Colorado. In E. C. Beaumont and C. B. Read, eds., New Mexico Geological Society Guidebook, 11th Field Conference, 113–127. Socorro: New Mexico Geological Society. Donnell, J. R., ed. 1960. Geological Road Logs of Colorado. Denver: Rocky Mountain Association of Geologists. Epis, R. C. 1981. Supplemental Road Log No. 2, Gunnison to Saguache, Colorado. In R. C. Epis and J. F. Callender, eds., Western Slope Colorado 1981. New Mexico Geological Society, no city given, 64–74. Evanoff, E. 1994. Late Paleogene Geology and Paleoenvironments of Central Colorado. Rocky Mountain GSA Field Guidebook 6–8 (May):1–97. Fassett, J. E. 1988. Second Day Road Log from Durango, Colorado around Northeast Rim of San Juan Basin via Bayfield, Chimney Rock, Arboles, Allison, and Ignacio, Colorado and Back to Durango. In J. E. Fassett, ed., Geology and Coal-Bed Methane Resources of the Northern San Juan Basin, Colorado and New Mexico. Denver: Rocky Mountain Association of Geologists, 337–351. Fenton, M. D., and G. Faure. 1970. Rb-Sr Whole-Rock Age Determinations of the Iron Hill and McClure Mountain Carbonatite-Alkalic Complexes, Colorado. Mountain Geologist 7:269–275. Galloway, M. J. 1980. Hydrologeologic and Geothermal Investigation of Pagosa Springs, Colorado . Special Publication 10. Denver: Colorado Geological Survey. Gries, R. R., and G. D. Vandersluis. 1989. Laramide and Cenozoic Geology Road Log. Denver : Rocky Mountain...