1999: Two unconformities or three? An old Devonian river channel sitting in the Cambrian Muav Limest
1999: Two unconformities or three? An old Devonian river channel sitting in the Cambrian Muav Limestone, both overlain by the lower Carboniferous Redwall Limestone; at approximately Mile 36 on the Colorado River. This trip, rafting down the Grand Canyon, would be likely candidate for My Best Trip Ever. A fab interactive geological map of the Grand Canyon can be found here. -- source link
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