A building site on cambered ground at Radstock, Avon.

This paper gives details of the foundation problems at a housing development on a 4-7 ^o slope of Blue Lias limestone, overlying Rhaetic and Keuper Marl. A simple classification of the extension gulls on this site caused by cambering, based on the mode of opening along joint and bedding surfaces and any subsequent collapse or infilling, is presented. The overall stability of the hillside is discussed with reference to the residual strength of the Rhaetic, which here is highly plastic, montmorillontic horizon containing well marked shear planes. -after Authors