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 [...]
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 waited upon glacial unloading? In distance "chimneys" with post-glacial talus cones. Westward across north (lower) end of Evolution Basin, Sierra Nevada. Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908.
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