The Science of Sustainability

Tag: rhyolite

Our Newest National Park: Pinnacles National Monument

Our Newest National Park: Pinnacles National Monument

This brand-new national park will be the closest one to the Bay Area. Let's get to know it.

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Geological Outings Around the Bay: Napa Glass Mountain

Geological Outings Around the Bay: Napa Glass Mountain

A Napa Valley roadcut was once a strategic resource center for the local inhabitants. Today it still draws visitors seeking out that resource: obsidian.

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