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Mahogany Mountain

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Mahogany Mountain is an ancient caldera volcano on the border of Oregon and Idaho, in Malheur County and Owyhee County, respectively.

Geography and geology

A part of the Basin and Range Province, the volcano dates to approximately 15 million years ago (the Miocene), forming during a period of active volcanism including eruptions of ignimbrite and ash. It formed around the same time as Three Fingers, Castle Peak, and three other volcanoes. Today the volcano appears gnarled due to erosion and is topped by pine forests.[1]

References

  1. ^ Bishop, p. 158.
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