History
During the Holocene, when the regional climate was less dry, streams running from nearby mountains gradually filled Death Valley to a depth of almost 3 ft (1 m), and together with Cotton Bail Marsh and Middle Basin, made up the 80 mi (130 km) long, Lake Manly. Some of the minerals left behind by earlier Death Valley lakes dissolved in the shallow water, creating a briny solution.
The wet times did not last as the climate warmed and rainfall declined. The lake began to dry up and minerals dissolved in the lake became increasingly concentrated as water evaporated. Eventually, only a briny soup remained, forming salty pools on the lowest parts of Death Valley's floor. Salts (95% table salt – NaCl) began to crystallize, coating the surface with a thick crust from 3 to 60 in (8 to 152 cm).
Read more about this topic: Badwater Basin
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