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Stop 3: Oldest Bedrock

Take a look at the oldest bedrock exposed here.

Stop 3: Oldest Bedrock

Reddish brown sandstone and siltstone (some with ripple marks) of the Permian Yeso Group are the oldest bedrock exposed on SMNHC trails.
Ripple marks on Yeso sandstone.

Reddish brown sandstone and siltstone (some with ripple marks) of the Permian Yeso Group are the oldest bedrock exposed on SMNHC trails.

Magnified view of a thin layer of Yeso sandstone grains. Magnified Yeso sandstone grains more zoomed in.

Images of the rock at the microscopic level.

This page was last updated on: February 11, 2022.