Question #4: How would you describe the shape of the profile valley? Question #5

Question

Question #4: How would you describe the shape of the profile valley?

Question #5: How do you think this profile differs from one of a valley carved entirely by a river?

TOPO! map printed on 04/17/05 from "Untitled.tpo" 119 34'00" W 7400 119°33'00" w WGS84 119 32'00" W 7200 Valley of Tenaya Creek 7000 6400 5800 5200 6200 5000 4200 5600 5400 4120 Column WILDERNESS 8600 Camp, N enay 8760 119 34'00" W 119 33'00" W WGS84 119 32'00" W MILE 000 METERS 14% Map created with TOPON C2003 National Geographic (www.nationalgeographic.com topo

Explanation / Answer

1. The shape of the valley is U shaped since it is a glacially carved valley. As we see the spacing of contour on the left side of the valley is more closely spaced which means here the gradient of the slope is more whereas on the right hand side of the valley the spacing of contours is wide so here the slope gradient is gentle. Also the valley floor is broad.

2. The shape of the profile formed entirely by the river is V shaped. This valley is carved from the erosion of the rock by the rivers which are moving fast. This valley has narrow floor with steep sloped sides on both sides of the mountains. Whereas the profile valley of the Tenaya is glacially carved valley and is U shaped. Also the floor of the valley is broad.

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