St. Francois Mountains igneous core

E1705907 UNEXPLORED

The St. Francois Mountains igneous core is an ancient Precambrian granite and rhyolite formation in southeastern Missouri that forms one of the oldest exposed rock regions in North America.

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Label	Occurrences
St. Francois Mountains igneous core canonical	1

Referenced by (1)

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Elephant Rocks State Park → geologicalContext → St. Francois Mountains igneous core ⓘ

subject linked to: Elephant Rocks