THUNDERBOLTS PICTURE OF THE DAY JULY 25, 2014 The deserts of - TopicsExpress



          

THUNDERBOLTS PICTURE OF THE DAY JULY 25, 2014 The deserts of the Southwest United States are full of anomalous geography. In a previous Picture of the Day, the giant sandstone tors of Monument Valley, Arizona were mentioned, in passing. Consensus geology considers monolithic structures to be millions of years old, and the result of erosion from wind and rain on volcanic intrusions or “folded” terrain caused by pressure. There are difficulties with those theories, however—not the least of which concern layered strata that are uniformly carved without regard to the hardness or the permeability of the rocks.
Posted on: Fri, 25 Jul 2014 23:11:28 +0000

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