Tag Archives: great unconformity

The Colorado River in the Grand Canyon – Blacktail Canyon, Mile 117 – 121

We tear ourselves away from Elves Chasm and drift downstream towards Blacktail Canyon, another favorite. In Stephen Aisle, at Mile 117, the Monument Fold fault intersects the river, and brings the Tapeats Sandstone to river level. Blacktail is a slot … Continue reading

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