The answer is;
The hanging wall rises above the footwall. This type of fault occurs due to compression tectonic movement that squishes the two crusts. This way the faulted section of rock shortens. This is the opposite of normal faults where the hanging wall falls below the footwall. This is due to extension tectonic movements that lengthen the faulted section.
Found at the lowest point of a large drainage area, these seasonal, marsh-like ponds collect and store water from rain and runoff. Unlike vernal pools, playas generally fill when temperatures are unsuitable for plant growth, and often the water is salty, alkali or both.
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