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Marker detail: Spine of the Keweenaw

Caption: Marker detail: Spine of the Keweenaw
Additional Description: The "Spine of the Keweenaw" — a ridge and valley system marking the peninsula's copper-rich fault line — runs the length of the peninsula, roughly paralleling U.S. Highway 41.
Submitted: July 31, 2020, by Cosmos Mariner of Cape Canaveral, Florida.
Database Locator Identification Number: p533178
File Size: 1.531 Megabytes

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