Photograph as originally submitted to this page in the Historical Marker Database www.HMdb.org. Click on photo to resize in browser. Scroll down to see metadata.
Cambrian-Ordovician Boundary
Photographer: Barry Swackhamer
Taken: July 1, 2014
Caption: Cambrian-Ordovician Boundary
Submitted: December 14, 2014, by Barry Swackhamer of Brentwood, California.
Database Locator Identification Number: p295251
File Size: 3.606 Megabytes

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