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.

Caption: Marker detail: The Forces of Change
Additional Description: The mud and sand river sediments of the Chinle Formation were buried under younger sediments becoming rock through a process called lithification.

Uplift and erosion of the Colorado Plateau erased overlying strata, exposing the rocks of the Chinle Formation.

Beginning about 16 million years ago, younger volcanic and lake sediments of the Bidahochi Formation reburied portions of the older Chinle Formation.

More recent erosion has removed most of the Bidahochi Formation. re-exposing the Chinle.
Submitted: December 25, 2020, by Cosmos Mariner of Cape Canaveral, Florida.
Database Locator Identification Number: p559178
File Size: 0.680 Megabytes

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