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Longitudinal Grooves - Cut by the Ice Age Floods

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Satellite view of longitudinal grooves near Dry Falls. Blue line included to show angle of grooves.

longitudinal groove: long parallel grooves eroded into rock benches and mesas in areas with extreme velocities and turbulance associated with the Scabland floods. (Bjornstad)





Longitudinal Grooves are described in Bruce Bjornstad's book, On the Trail of the Ice Age Floods.


All photos by Tom Foster unless otherwise noted.

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