Volcanic necks on Navajo lands
Description
Volcanic necks are left when magma is pushed up through cracks in softer rock; if it reaches the surface, that is a volcano. But often, the narrow vertical channels it went up remain as igneous rock, which is much harder than the surrounding rock. The surrounding rock erodes away and leaves the igneous rock standing.
Twin Peaks, near Indian Wells, Navajo Nation, Arizona
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