Many rocks that you can find in Kenai Fjords National Park are sedimentary, specifically Shale and Sandstone. If you see Sandstone in Kenai Fjords, it would probably be yellow, dark red, white or gray. These are formed by the erosion of the Kenai Mountains covered by the Harding Icefield into sediments, and deposition of the sediments because of all the water pressure from the deep fjords. Shale has finer grains than the sediment of the Sandstone, like clay particles and sand particles. Shale was formed by the succession of the layering of the finer particles that travel farther through a silent stream. Both types of rocks have some iron in them.
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