Another well-known bed, formerly known as the "Bristol" or "Lias" Bone Bed, exists in the form of several thin layers of micaceous sandstone, with the remains of fish and saurians, which occur in the Rhaetic Black Paper Shales that lie above the Keuper marls in the south-west of England.
Most of the southern part of the county is occupied by Keuper marls and sandstones, the latter yield good building stone; and at Chellaston the gypsum beds in the former are excavated on a large scale.
The Keuper clays yield material for bricks.
Spherosiderites and brown iron ores are plentiful also in the " Keuper formation."
In England extensive deposits of rock-salt are found near the base of the Keuper marl, especially in Cheshire.
Important deposits of rocksalt occur in the Keuper at Berchtesgaden, in the Bavarian Alps; at Hall in Tirol and at Hallein, Hallstatt, Ischl and Aussee in the Salzkammergut in Austria.
Such casts are not infrequent in the Keuper marls and sandstones, and in the Purbeck beds of England.
The plain sweeps round south of the Lancashire coal-field, forms the valley of the Mersey from Stockport to the sea, and farther south in Cheshire the salt-bearing beds of the Keuper marls give rise to a characteristic industry.
The " Waterstones," or Lower Keuper Sandstones, - forming gentle elevations above the softer marls, and usually charged with an abundant supply of water, which can be reached by wells, - form the site of many towns, such as Birmingham, Warwick and Lichfield, and of very numerous villages.