Obsidian Flow #2
by Science Photo Library
Title
Obsidian Flow #2
Artist
Science Photo Library
Medium
Photograph - Photograph
Description
Obsidian flow. Close-up of a rock face made of obsidian. This pyroclastic material formed when a slow-moving, silica-rich lava flow cooled rapidly. It is also known as volcanic glass. Photographed in Newberry Volcanic National Monument, Oregon, USA.
Uploaded
September 17th, 2018
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