 Potash pits were of a similar shape and size, however, they were used to make potash for use in coursing or degreasing wool and were once found in sheep rearing areas.The pits are a common feature in lead mining districts such as the Leadhills in Scotland and East Derbyshire.Due to their small size, they are not likely to be confused with quarries, although bomb craters from World War II can occasionally lead the landscape historian astray.