Yol. 68.^ IN THE ' peemian' kocks of hamstead. 651 



Upper Permian j.fD^. Marls with intercalated breccia-bands. 

 or Breccia Group. [Dj. Trappoid breccia and breccia-sandstone. 



qJO^. Marls. 

 MiDDTE Pfrmtan L 0^ . Calcareous zonc. 



r^^ ' I x>rB„, Soft red and mottled saudstones and marls. 



or (Jalcareous j B ■{ -d^ r^ ^ 

 pi , , 1 [ B^. Oalcareous zone. 



M ' A i "^a- ^^^^ sandstones and marls. 



"' L I A^. Calcareous zone. 



If we accept the above arrangement, it becomes at once evident 

 that the descending succession of the lithological sub-groups in the 

 Hamstead area, as worked out by myself and described by me in 

 the preceding pages of the present paper, falls quite naturally into 

 Mr. Wickham King's scheme. 



The Quarry Series of Hamstead belongs in part to his Upper 

 Permian division (Walton) and in part to his Middle Permian 

 (St. Kenelms), the line of division between the two occurring at 

 the base of the Manor-House Breccia. 



The 70 feet of breccia and sandstones of the Manor-House 

 Breccia and Sandstone Sub-group at Hamstead are evidently the 

 representatives of Mr. King's division D^ ; while the 22 feet of the 

 Tower-Hill Sandstone Sub-group are the representatives of the 

 rocks of his sub-group of sandstone and marls, D^. 



Below the Manor-House Breccias, the Old Uuarry Sandstones 

 answer to C^, and the Rock-Farm Conglomerate, met with in the 

 face of the 'New Quarry, to C^. The rocks beneath this con- 

 glomerate and down to the base of the quarry (that is, the Kew- 

 Quarry Marl Sub-group) belong to the subdivision B^. 



The calcareous sandstone and conglomerate of the floor of the 

 quarry (namel}^, the Gravel-pit Sandstone and Conglomerate Sub- 

 group, which is at an horizon slightly above that of the top beds 

 of the Hamstead Shaft), correspond to Mr. King's subdivision B^. 



My own personal observation of the Hamstead strata extended 

 only to the actual site of the Hamstead Shaft ; but a study of the 

 Hamstead Colliery-shaft section, as drawn up at the time of its 

 sinking, makes it evident that in the higher parts of the shaft the 

 uppermost beds (from the surface down to 86 J feet) are merely the 

 downward continuation of the lowest beds of the Quarry Series, 

 and must therefore, as a whole, be correlated with Mr. Wickham 

 King's sub-group A^. 



In his paper already cited, that writer traces his three divisions 

 of the ' Permian' throughout the region, from the Clent Hills round 

 the south-eastern corner of the South Staffordshire Coalfield as far 

 as the line of the Great Western Railway, west of Handsworth 

 station, and distant but 3 miles south-west from Hamstead. A 

 section of the ' Permian ' rocks met with in the railway-cutting 

 west of Handsworth Station is summarized by Mr. King in his 

 paper. The detailed sequence, as worked out by him, is shown 

 in the first column of the table on p. 654, and in fig. 8, p. 652. 



Yaluable evidence to support this correlation, and to continue it 

 downwards into the rocks of the Hamstead Shaft itself, has been 

 afforded by the study of a detailed section of a boring, made in 



