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Trachyte contact, Engineer Mountain. San Juan County, Colorado. 1906.


Date Taken


Album Caption: Engineer Mountain seen from the north, from a ledge in the basin west of Jura Butte. To show the trachyte contact, the rude columnar jointing, and the great northerly rock stream. San Juan County, Colorado. 1906. (19-inch lens, stop 16, exposure 1/25 second). Published in U.S. Geological Survey Professional paper 67, Plate 18-A. 1909. Published in U.S. Geological Survey Folio 171, figure 7. 1910.


Data Owner :
U.S. Geological Survey
Photographer :
Cross, Charles Whitman

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Image located in U.S. Geological Survey Photographic Library, Cross, C.W. Oversize Collection Album, no.847.


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Additional Information


Type Scheme Key
name photoLibrary ccw00847
number photoLibrary 8319
batch photoLibrary btch241
number_in_book photoLibrary 847

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