Graben
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In geology, a graben is a depressed block of the crust of a planet or moon, bordered by parallel normal faults.
Infrared-enhanced satellite image of a graben in the Afar Depression
The Newark Basin, an early Mesozoic half-graben
Rima Ariadaeus on the Moon is thought to be a graben. The lack of erosion on the Moon makes its structure with two parallel faults and the sunken block in between particularly obvious.
Depression (geology)
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In geology, a depression is a landform sunken or depressed below the surrounding area. Depressions form by various mechanisms.
A watering hole is a natural depression where water collects and animals come to drink.
Karst closed depression with permanent lake Stymfalia, Peloponnese, Greece. Seasonal abundant precipitation drained by 3 sinkholes