Claypan

In geology, a claypan is a dense, compact, slowly permeable layer in the subsoil having a much higher clay content than the overlying material, from which it is separated by a sharply defined boundary. Claypans are usually hard when dry, and plastic and sticky when wet. They limit or slow the downward movement of water through the soil.

Animal habitats

Claypans provide homes to a variety of flora and fauna. One such species is the Dawson's Burrowing Bee, located in Australia. This species uses claypans as the sites for their underground nests, where individuals will they lay their broods post-mating.

gollark: I would be impressed if they managed to write a webapp in that.
gollark: The economic damage due to software being slightly bad and worsening productivity must be *immense*.
gollark: Yes, "only" a few hundred megabytes.
gollark: Teams can just be pushed centrally by a company, regardless of whether anyone actually likes using it.
gollark: (and use it while gaming™ and such)

See also

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