New Mexico Geological Society
Fall Field Conference Guidebook - 8
Southwestern San Juan Mountains, Colorado


Frank E. Kottlowski and Brewster Baldwin, eds., 1957, 258 pages.

The New Mexico Geological Society welcomes you to its Eighth Field Conference. Past field trips have been essentially within the confines of New Mexico, but this year we are visiting the San Juan Mountains of Colorado where the exposed rocks bear significantly on the geology of adjoining parts of our State. The first day road log is from Durango to Silverton with 9 stops along the Million Dollar Highway. The second day road log is from Silverton to Ouray and Ridgeway and return to Silverton. The third day road log is from Silverton to Eureka and return to Silverton. There is also an additional railroad log for the Denver & Rio Grande Western Railroad Silverton to Durango.

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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 (602 KB PDF)

Roadlogs: (each includes listed mini-papers)


Geology along the Million Dollar highway
— Frank E. Kottlowski, pp. 14-22.
Table of Pre-Quaternary bedded rocks in southwestern San Juan Mountains
— F. Kottlowski, B. Baldwin, and W. Bejnar, pp. 23-26.
Entrance road log, Albuquerque to Durango
— Clay T. Smith, pp. 27-37.
Road log for Thursday, September 5, 1957. Durango to Silverton
— Kirtley F. Mather, Sherman A. Wnegerd, and D. L. Baars, pp. 39-52.
Road log for Friday, September 6, 1957. Silverton to Red Mountain Pass to Ouray and Ridgway, and return to Silverton
— Vincent C. Keley, James R. Hillebrand, Kirtley F. Mather, Robert G. Luedke, and and others, pp. 53-71.
Road log from Silverton to Eureka and back to Silverton
— Wilbur S. Burbank and Robert G. Luedke, pp. 72-74.
Railroad log: The Denver and Rio Grande Western Railroad Silverton to Durango
— Caswell Silver, pp. 75-90.
Exit road log. Durango to Cortez
— Jack C. Cooper, Donald Langston, Robert R. Smart, Bill . Street, and J. R. Bashard, pp. 91-94.
Exit road log. Durango to Pagosa Springs
— Harley Barnes, pp. 95-101.


Geomorphology of the San Juan Mountains (1.02 MB PDF)
— Kirtley F. Mather, pp. 102-108.
The Idarado Mine (1.60 MB PDF)
— James R. Hillebrand, pp. 176-188.
Geology of Ouray and environs (0.98 MB PDF)
— Vincent C. Kelley, pp. 203-207.
Coal resources of the Durango area, Colorado and New Mexico (742 KB PDF)
— Philip T. Hayes and C. B. Read, pp. 207-211.
Mines and ore deposits near Ouray, Colorado (802 KB PDF)
— Vincent C. Kelley, pp. 217-221.
Geologic road logs for routes in New Mexico
— Frank E. Kottlowski, pp. 235-242.

Recommended Guidebook Citation:

  1. Kottlowski, F. E.; Baldwin, B.; [eds.], 1957, Southwestern San Juan Mountains (Colorado), New Mexico Geological Society, Guidebook, 8th Annual Field Conference, 258 pp.