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Hydrothermally altered rock in Devil's Kitchen, Lassen Volcanic Center

By California Volcano Observatory
A plume of steam and volcanic gas rises from a pit in a colorful, bare hillside. The ground is streaked with pinks, reds, yellows, and whites, and near the pit are spatters of gray mud. A stream runs through the foreground and in the background dark pine trees are silhouetted against a sky full of fluffy clouds.
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Detailed Description

This steam vent in the Devil's Kitchen hydrothermal area of Lassen Volcanic Center is surrounded by multicolored hues of altered volcanic rock. Hydrothermal alteration changes primary volcanic minerals like feldspar into clays and other phyllosilicates.

Sources/Usage

Public Domain.