Mount Shasta, a steep-sided Cascade Range stratovolcano in Northern Ca
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Mount Shasta, a steep-sided Cascade Range stratovolcano in Northern California, looms above Little Glass Mountain, a thick obsidian flow erupted from the Medicine Lake shield volcano about 1,000 years ago. These are just two of the young volcanic areas monitored by the USGS California Volcano Observatory. USGS photo.
Image Dimensions: 1500 x 1126
Location Taken: US