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Thickness 500 feet (150 m) at its maximum Other sandstone and glauconitic sandstone Country United States of America Named for Bright Angel Canyon, Bright Angel quadrangle, Coconino Co., Arizona |
Carl with bright angel shale
The Cambrian Bright Angel Shale is the middle member of the 3-member Tonto Group. It is about 500 feet (152 m) thick at its maximum. It is a nonresistant slope-forming unit. The Bright Angel Shale consists of green and purple-red, siltstone and shale which is interbedded with red-brown to brown sandstone that is similar in lithology to the underlying Tapeats. The Bright Angel Shale underlies and interfingers with Muav Limestone. The Bright Angel Shale is located in the lower elevations of the Grand Canyon, Arizona.
Contents

Geologic sequence
The units of the Tonto Group:
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References
Bright Angel Shale Wikipedia(Text) CC BY-SA