New Mexico Geological Society
Fall Field Conference Guidebook - 19
San Juan-San Miguel-La Plata Region, New Mexico and Colorado
John W. Shomaker, ed., 1968, 212 pages.
According to a popular travel guide, "Colorado's San Juan Mountains and the adjacent San Miguel-La Plata Mountain region, with many peaks rising over 14,000 feet, is the closest thing to Switzerland this side of Europe and one of the most beautiful areas of the United States." One might add that the beauty of the region is, to a large degree, dependent upon tremendously interesting and spectacular geological relationships. The New Mexico Geological Society takes pleasure in welcoming you to its Nineteenth Annual Field Conference in this splendid blend of geology and scenery. The first day road log is from Farmington, New Mexico to Cortez, Colorado, via Four Corners Power Plant, La Plata Canyon, La Plata mining area and Mancos. The second day road log is from Cortez, Colorado to Ouray, Colorado via Dolores, Rico, Lizard Head Pass, Telluride, Placerville, Dallas Divide and Ridgeway. The third day road log is from Ouray, Colorado to Farmington, New Mexico via Silverton, Eureka, Durango, and Aztec.
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Table of Contents:
Note —Downloads of the papers below are free. Road logs, mini-papers, and some other sections of recent guidebooks are only available in print.
Front Matter: (includes Dedication, President's Message, & Conference Organizer's Message)
Download (1.10 MB PDF)
Roadlogs: (each includes listed mini-papers)
First day road log from Farmington, New Mexico to Cortez, Colorado, via Four Corners Power Plant, La Plata Canyon, La Plata mining area and Mancos
— C. M. Molenaar and Larry L. Werts, pp. 11-23. https://doi.org/10.56577/FFC-19.11
— C. M. Molenaar and Larry L. Werts, pp. 11-23. https://doi.org/10.56577/FFC-19.11
Papers:
Summary of geologic data obtained from borehole GB-1, Project Gasbuggy (1.41 MB PDF)
— James E. Fassett, pp. 24-27. https://doi.org/10.56577/FFC-19.24
— James E. Fassett, pp. 24-27. https://doi.org/10.56577/FFC-19.24
Fluvioglacial features of the Animas River Valley, Colorado and New Mexico (3.77 MB PDF)
— Charles A. Bandoian, pp. 28-32. https://doi.org/10.56577/FFC-19.28
— Charles A. Bandoian, pp. 28-32. https://doi.org/10.56577/FFC-19.28
Coal-bearing formations in the western part of the San Juan basin of New Mexico (948 KB PDF)
— Edward C. Beaumont, pp. 33-40. https://doi.org/10.56577/FFC-19.33
— Edward C. Beaumont, pp. 33-40. https://doi.org/10.56577/FFC-19.33
Geology and ore deposits of the La Plata district, Colorado (3.25 MB PDF)
— Eckel, Edwin B. with sections by Williams, J. S. and Galbraith, F. W. Digest prepared by Trauger, F. D., pp. 41-62. https://doi.org/10.56577/FFC-19.41
— Eckel, Edwin B. with sections by Williams, J. S. and Galbraith, F. W. Digest prepared by Trauger, F. D., pp. 41-62. https://doi.org/10.56577/FFC-19.41
Second day road log from Cortez, Colorado to Ouray, Colorado via Dolores, Rico, Lizard Head Pass, Telluride, Placerville, Dallas Divide and Ridgway
— J. H. Steward, E. T. McKnight, A. L. Bush, L. R. Litsey, C. T. Sumsion, and C. M. Molenaar, pp. 63-82. https://doi.org/10.56577/FFC-19.63
— J. H. Steward, E. T. McKnight, A. L. Bush, L. R. Litsey, C. T. Sumsion, and C. M. Molenaar, pp. 63-82. https://doi.org/10.56577/FFC-19.63
Summary of the geology of the Rico Region, Colorado (624 KB PDF)
— Walden P. Pratt, pp. 83-87. https://doi.org/10.56577/FFC-19.83
— Walden P. Pratt, pp. 83-87. https://doi.org/10.56577/FFC-19.83
Rico, Colorado: A cenntury of historic adventures in mining (2.02 MB PDF)
— Charles M. Engel, pp. 88-93. https://doi.org/10.56577/FFC-19.88
— Charles M. Engel, pp. 88-93. https://doi.org/10.56577/FFC-19.88
Multiple intrusions in the San Miguel Mountains, Colorado (1.09 MB PDF)
— Calvin S. Bromfield and Alfred L. Bush, pp. 94-99. https://doi.org/10.56577/FFC-19.94
— Calvin S. Bromfield and Alfred L. Bush, pp. 94-99. https://doi.org/10.56577/FFC-19.94
Vanadium deposits of the Placerville area, San Miguel County, Colorado (688 KB PDF)
— R. P. Fischer, pp. 100-103. https://doi.org/10.56577/FFC-19.100
— R. P. Fischer, pp. 100-103. https://doi.org/10.56577/FFC-19.100
Third day road log from Ouray, Colorado to Farmington, New Mexico, via Silverton, Eureka, Durango, and Aztec
— C. M. Molenaar, John W. Shomaker, Larry L Werts, and Jock A. Campbell, pp. 104-129. https://doi.org/10.56577/FFC-19.104
— C. M. Molenaar, John W. Shomaker, Larry L Werts, and Jock A. Campbell, pp. 104-129. https://doi.org/10.56577/FFC-19.104
The Idarado Mine (909 KB PDF)
— James R. Hillebrand, pp. 130-140. https://doi.org/10.56577/FFC-19.130
— James R. Hillebrand, pp. 130-140. https://doi.org/10.56577/FFC-19.130
Joint analysis applied to structures of the Silverton volcanic center (2.00 MB PDF)
— Schwarz, Frederick P., Jr., pp. 141-147. https://doi.org/10.56577/FFC-19.141
— Schwarz, Frederick P., Jr., pp. 141-147. https://doi.org/10.56577/FFC-19.141
A brief geological history of the Precambrian rocks of the Needle Mountains, southwestern Colorado (439 KB PDF)
— Fred Barker, pp. 148-149. https://doi.org/10.56577/FFC-19.148
— Fred Barker, pp. 148-149. https://doi.org/10.56577/FFC-19.148
Character of part of the Hermosa Formation (Pennsylvanian), San Juan Mountains, Colorado (3.87 MB PDF)
— W. Arch Girdley, pp. 150-158. https://doi.org/10.56577/FFC-19.150
— W. Arch Girdley, pp. 150-158. https://doi.org/10.56577/FFC-19.150
Pennsylvanian correlations in southwestern Colorado (1.19 MB PDF)
— Sherman A. Wengerd and Ernest Szabo, pp. 159-164. https://doi.org/10.56577/FFC-19.159
— Sherman A. Wengerd and Ernest Szabo, pp. 159-164. https://doi.org/10.56577/FFC-19.159
Photogeologic color analysis an effective supplement to mineral exploration (3.85 MB PDF)
— Raymond P. Platt, pp. 165-167. https://doi.org/10.56577/FFC-19.165
— Raymond P. Platt, pp. 165-167. https://doi.org/10.56577/FFC-19.165
Placer gold in southwestern Colorado (2.13 MB PDF)
— Parker, Ben H., Jr., pp. 168-184. https://doi.org/10.56577/FFC-19.168
— Parker, Ben H., Jr., pp. 168-184. https://doi.org/10.56577/FFC-19.168
Relationship of uranium in the Rocky Mountains of southwestern Colorado to local and regional metallogenesis (1.45 MB PDF)
— Roger C. Malan, pp. 185-192. https://doi.org/10.56577/FFC-19.185
— Roger C. Malan, pp. 185-192. https://doi.org/10.56577/FFC-19.185
Road log from Albuquerque to Farmington
— Clay T. Smith, Vincent C. Kelley, Baltz, Elmer H., Jr., and Roy A. Bailey, pp. 193-201. https://doi.org/10.56577/FFC-19.193
— Clay T. Smith, Vincent C. Kelley, Baltz, Elmer H., Jr., and Roy A. Bailey, pp. 193-201. https://doi.org/10.56577/FFC-19.193
Articles of incorporation, constitution, and by-laws of the New Mexico Geological Society, Inc. (539 KB PDF)
— New Mexico Geological Society, pp. 202-205. https://doi.org/10.56577/FFC-19.202
— New Mexico Geological Society, pp. 202-205. https://doi.org/10.56577/FFC-19.202
Recommended Guidebook Citation:
- Shomaker, J. W.; [ed.], 1968, San Juan, San Miguel, La Plata Region (New Mexico and Colorado), New Mexico Geological Society, Guidebook, 19th Annual Field Conference, 212 pp. https://doi.org/10.56577/FFC-19