In the lower Severn valley, the highest and oldest terrace was designated the Woolridge in 1938. The gravels have been reexamined and found to be of two different ages. The older gravels are probably outwash of a Severn valley glacier; the younger series consists of stream gravels. It is proposed to call the older series the Woolridge, and the slightly younger gravels, the Upleadon. Both are composed chiefly of Bunter pebbles, but the younger series also has abundant Silurian material.