III.—Spirorbis - Limestones in the ‘Permian’ of the South Staffordshire and Warwickshire Coal-fields

Abstract

A period of nearly forty years has now elapsed since several bands of Spirorbis-limestone were met with in the so-called Lower Permian rocks of the South Staffordshire Coal-field during the sinking of the Sandwell Park and Hamstead pits in the neighbourhood of West Bromwich. From the published accounts of those sinkings, in the first case by Mr. Henry Johnson, and in the second by Messrs. Meachem and Insley and Dr. Robert Kidston, Spirorbis-limestones appear to have been found at 206 feet above the base of the ‘Permian’ at Sandwell, and at 329 and 795 feet respectively at Hamstead.