Sunday, August 9, 2026

Recent trip to Glass Mountain, Modoc County, California

 


Medicine Lake in the bottom of the Medicine Lake Caldera, with Mt. Shasta to the west.


Wild Obsidian



A streak of obsidian.


Most of this was burped up about 950 years ago, a blink in geologic time.  In fact, there is some evidence that there was mild volcanic activity as recently as 1910.


The trail.


A streak of obsidian embedded in pumice.  So cool.

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