Image: Gray shale & bentonites (Benton Shale, Upper Cretaceous; Red Rock Canyon Open Space, Colorado Springs, Colorado, USA) 5
Description: Shales & bentonites in the Cretaceous of Colorado, USA. The Benton Shale is a widespread marine shale unit in the Cretaceous of western America. It was deposited in the ancient Western Interior Seaway at a time of globally-high sea level. The thin, lighter-colored horizons in this dark gray shale exposure are volcanic ash beds. Such horizons are called "bentonites", which are named after the Benton Shale itself. Stratigraphy: Benton Shale, Upper Cretaceous Locality: slope exposure along the Lower Hogback Trail, Red Rock Canyon Open Space, western side of the town of Colorado Springs, western El Paso County, central Colorado, USA (~vicinity of 38° 50’ 54.92” North latitude, 104° 52’ 30.71” West longitude)
Title: Gray shale & bentonites (Benton Shale, Upper Cretaceous; Red Rock Canyon Open Space, Colorado Springs, Colorado, USA) 5
Credit: https://www.flickr.com/photos/47445767@N05/49284023183/
Author: James St. John
Usage Terms: Creative Commons Attribution 2.0
License: CC BY 2.0
License Link: https://creativecommons.org/licenses/by/2.0
Attribution Required?: Yes
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