Dinosaur Ridge - Volcanic Ash Layer

SIA3565: Dinosaur Ridge - Volcanic Ash Layer

Photographer:	Calvin J. Hamilton
Copyright:	© 2010 Calvin J. Hamilton
Date:	2006/06/06
Date Added:	2010/01/30
Location:	Dinosaur Ridge, Morrison, Colorado

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Image Name	Width x Height	Size
SIA3565.jpg	640 x 443	98K
SIA3565.jpg	1200 x 829	269K
SIA3565.jpg	3504 x 2418	1M

Caption

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.