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Fundamentals of Physical Geography

2nd Edition
James Petersen
ISBN: 9781133606536

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BuyFindarrow_forward

Fundamentals of Physical Geography

2nd Edition
James Petersen
ISBN: 9781133606536
Textbook Problem

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FIGURE 15.13 Map of the Great Basin of the western United States showing major lakes that existed during ancient glacial times. Most of these fault-block basins have alluvial fans.

Why are there only a few lakes in this region today?

To determine

The reason why the given area is characterized by only few lakes today.

Explanation

The streams that are loaded with sediment rush periodically from canyons into uplifted fault Block Mountains. As a result, they deposit their load in desert basins that are adjacent to them and closer to the mountain front. Due to infiltration and evaporation losses, the flow of stream may be terminated at the alluvial fan. However, occasionally it reaches the basin floor beyond the alluvial fan. The remaining load, the silts, and clays are deposited there...

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