SIA3564: Dinosaur Ridge - Volcanic Ash Layer

Photographer:Calvin J. Hamilton
Copyright:© 2010 Calvin J. Hamilton
Date Added:2010/01/30
Location:Dinosaur Ridge, Morrison, Colorado

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The white layer interbedded with sandstone and shale is volcanic ash deposited from a volcanic eruption northwest of Colorado. It has been dated to be 105.6 (+/- 1.3) million years old or early Cretaceous in the geologic time.

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