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Glacial cirque on east face of Electric Peak, northern Gallatin Range. Yellowstone National Park, Wyoming. 1970. Album caption and index card: Glacial cirque on east face of Electric Peak, northern Gallatin Range. During several episodes of glaciation, this steep-walled amphitheater-like valley was cut and filled by ice which fed glaciers moving downslope to the lower right. The cirque floor is now covered by a thick deposit of rock rubble underlain in part by ice, and the whole mass is still moving, slowly downhill as a rock glacier. The dark rock at lower right is part of the Electric Peak stock, composed of diorite (photo no. 636) and other kinds of intrusive igneous rocks. The rocks in the cirque walls are chiefly Cretaceous shales (light to moderately dark color) with thin sills of igneous rock (very dark color). Yellowstone... Categories: Image; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: National Parks, Photographers, Stacy, J.R.Collection, Yellowstone National Park, Yellowstone National Park Collection, All tags... photo print, Fewer tags