salt pan

an undrained natural depression, as a crater or tectonic basin, in which the evaporation of water leaves a deposit of salt.

Origin of salt pan

First recorded in 1485–95

And there's no mistake about it; it isn't no salt-pan, but fresh water fit for a king to drink.

The Bushranger's Secret |Mrs. Henry Clarke
Then said Nqong from his bath in the salt-pan, "Come and ask me about it to-morrow, because I'm going to wash."

Kipling Stories and Poems Every Child Should Know, Book II |Rudyard Kipling
To avoid the salt-pan, we turned to the right, so as to skirt its eastern side.

Adventures in Africa |W.H.G. Kingston
Then said Nqong from his bath in the salt-pan, 'Come and ask me about it tomorrow, because I'm going to wash.'

Just So Stories |Rudyard Kipling

Then there is the fish-pond to make, and also a salt-pan to cut out of the rock.

Masterman Ready |Captain Frederick Marryat

salt pan

A small, undrained, shallow depression in which water accumulates, evaporates, and deposits salt.

A small lake of brackish water occupying such a depression.