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Roche moutonnee. In middle distance in shadow, a moutonnee form, long in the direction of glacier movement. Sierra Nevada. Fresno County, California. 1908.

Dates

Date Taken
1908

Summary

Roche moutonnee. In middle distance in shadow, a moutonnee form, long in the direction of glacier movement (left to right). As in the basin generally, the rock is granite. The moutonnee form is close-jointed transversely; there is approximately longitudinal jointing also, but less closely spaced. By such a joint system quarrying would seem to be favored especially; yet abrasion in a late stage of degradation at least has been the prominent process. Dome structure is not sensibly developed. Breaking down on the moderately steep face toward observer has been post-glacial, as shown by the joint-block talus. It has occurred by mere gravity. Is the transverse jointage possibly post-glacial? Dilatation from unloading by degradation having [...]

Contacts

Data Owner :
U.S. Geological Survey
Photographer :
Gilbert, Grove Karl

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Type Scheme Key
name photoLibrary ggk03367
number photoLibrary 12845
batch photoLibrary btch178
number_in_book photoLibrary 3367

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