Tag Archives: tapeats sandstone

The Colorado River in the Grand Canyon – the Middle Granite Gorge, Miles 127 – 130

The Middle Granite Gorge begins at 127 Mile rapid, as the first of its characteristic black schist appears. The next mile is packed full of things that you’ll want to take a close look at, most especially the fluted and … Continue reading

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The Colorado River in the Grand Canyon – 122 Mile Rapid to Randy’s Rock, Miles 122 – 126

In August of last year (2014), I began a series of posts on running the Colorado River in the Grand Canyon. That series temporarily ended with the area surrounding Blacktail Canyon, Miles 117 – 121: (https://believesteve.wordpress.com/2014/12/09/the-colorado-river-in-the-grand-canyon-blacktail-canyon-mile-117-121/). Now I begin again, … Continue reading

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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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The Colorado River in the Grand Canyon – Miles 109 to 115

109 Mile Rapid follows closely after Shinumo Rapid. Evidence of more faulting and Supergroup rocks are seen there on river right. At the end of this straight stretch is Hakatai Canyon, on river right at Mile 110.9. The Tapeats Sandstone … Continue reading

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The Colorado River in the Grand Canyon – entering the Upper Granite Gorge

The Upper Granite Gorge begins where the run through Hance and Son of Hance rapids ends, at Mile 77.9.  The main rock type of the Upper Granite Gorge (and the other two Granite Gorges) is Vishnu Schist, a hard metamorphic … Continue reading

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