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Photographer's Note

In this view is one of Zion Canyon's Emerald Pools. In early November the trees at higher elevations were already leafless unlike the colorful leaf ones at lower elevations.

Zion and the surrounding Grand Staircase area's geology 200 million year's ago was a great desert basin. Over vast spans of time, mountains eroded and material was transported by slow moving streams and rivers depositing sand in a vast basin. Conditions and the environment changed as time passed and sea water covered dunes of sand making hard sandstone. The seabed turned to limestone and mud and clay changed to mudstone and shale, forming the sweeping diagonal cross-bedding that Zion is famous for.

The basin lowered due to the weight of the deposits and more time passed as the earth shifted and forced the plateau up, slowly and irregularly and the sea drained away. Streams flowed over the edge of the plateau empowering debris to move at a great rate. The process carved Zion Canyon forcing vertical retreat of canyon walls. Today the North Fork of the Virgin River continues to move debris and erode the canyon, shaping and sculpturing its landmarks.

ACL1978, Noel_Byrne, delpeoples, jhm, ktanska, elenimavrandoni has marked this note useful

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Additional Photos by Ray Anderson (photoray) Gold Star Critiquer/Gold Note Writer [C: 1054 W: 1 N: 2749] (11351)
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