A). Identify the features indicated with the following letters and briefly descr

Question

A). Identify the features indicated with the following letters and briefly describe how they formed.

C:________________________________________________________

D:________________________________________________________

B). The area labeled A on the map is a bedrock surface covered by a thin layer of sediment.
This feature is called a(n)_________.

C). Assume the erosion continues in the area without interruption. How might the area look millions of years from now?

SmartFigure 3 Stages of landscape evolution in a block-faulted, mountainous desert such as the Basin and Range region of the West. A. Early stage; B. middle stage; C. late stage. Playa lakes Alluvial fans WA MT oR WY NV Basin and Range UT Bajada Playa A. Early stage TX Playa Inselberg B. Middle stage Pedimente C.Late stage

Explanation / Answer

Answer A), Here stage C represents late stage of the Bajada fault mountains and it takes place due to continuous erosion of stream. at first, coarser material appears at surface which are continuously eroded away with stream of water leading to the formation of pediment and Inselberg.
A pediment is a very gently sloping (.5°-7°) inclined bedrock surface.[1] It typically slopes down from the base of a steeper.

  An inselberg is an isolated rock hill, knob, ridge, or small mountain that rises abruptly from a gently sloping or virtually level surrounding plain and it is made of very hard material.

here, D represents Basin which is formed after a very long period of time.

B) The feature is known as Alluvial sediment or Alluvial Fan.

d)When a stream flows downhill it picks up sediment along with other materials, and as that stream emerges from a mountain front the sediment begins to deposit. The coarser sediment falls out closest to the base and the finer sediment grades outwards and deposits in a fan-shape away from the mountain face. The sediment is transported across a pediment into a closed basin where the bajadas grade back into a pediment, making the boundary difficult to distinguish. Bajadas frequently contain playa lakes.

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