How Did the Layers of the Grand Canyon Form?
ES2906  Coconino and Toroweap

  !   Click the Coconino Sandstone and the Toroweap Formation in the diagram for details on their formation. Move your cursor over the photographs to highlight the featured layers.

11. Based on the rocks, how might the climate of the area have changed between deposition of the Hermit Shale and the Coconino Sandstone?

Adapted from National Park Service

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