ST Alpha - "Saw that on the earthquake map earlier. That's an area of hot springs and earlier volcanic activity." (Reading a Post)

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In response to "quake swarm on San Andreas fault near mexican border worries geologists -- (link)" by zeitgeist

Saw that on the earthquake map earlier. That's an area of hot springs and earlier volcanic activity.

Posted by Meg (aka Mojave) Aug 10 '20, 21:48

Major source of low-grade obsidian in earlier times.

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