Dillon Pinnacles
by Eric Rundle
Title
Dillon Pinnacles
Artist
Eric Rundle
Medium
Photograph - Photographs
Description
The Dillon Pinnacles are made of eroded West Elk Breccia, a composite rock spewed from the volcanic West Elk Mountains 30 million years ago.
From a distance, the West Elks, with their central Needle Rock, look like the remains of a climate changing explosive event but are in fact the remains of an entire field of Stratovolcanoes. Stratovolcanoes are versatile eruptors and are easily recognized by their dramatic cone shape. At one time or another, the volcanoes in the West Elks probably erupted with explosive force like Mt. Rainer, or sent plumes of ash into the stratosphere. The West Elk Breccia is composed of rock and ash that fell from at least one explosive eruption that resulted in over 600 ft of ash and rock accumulation. You can see the West Elks from the south rim of the Black Canyon of the Gunnison or even more dramatically from Hwy 92 heading toward the north rim of the park
Uploaded
July 8th, 2013
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