41 8 Mr. Brockbank on 



On the occurrence of the JPermians, Spirorbis Lime- 

 stones, and Upper Coal Measures at Frizington 

 Hall in the Whitehaven District. By William 

 Brockbank, F.L.S., FG.S. 



{Received March loth and April 2ist^ i8^i.) 



Professor HULL describes the Whitehaven Coal Field 

 in three divisions, (i) Upper Series: Purplish grey sand- 

 stones of Whitehaven. (2) Middle Series : Developed at 

 Cleator Moor, where seven workable seams occur. (3) 

 Lower Series : Containing four or five inferior seams. He 

 adds that ' It has been a matter of some dispute whether 

 the Whitehaven Sandstones should be classed as Permian or 

 Coal Measures.' The Middle Series are now being worked 

 at Cleator Moor, the measures being cut off by the Weddi- 

 ker Hall fault. To prove the strata beyond this fault a 

 bore hole is being put down near Frizington Hall, in the 

 expectation of finding the same strata to the north-east as 

 those now being worked on the westerly side of the fault. 

 The bore-hole commenced in surface clays, &c., con- 

 glomerate being reached at 22ft.^it was 20ft. thick. This 

 was succeeded by red and mottled shales and sandstones 

 for 50ft. when limestone was passed through. Cores 

 representing these beds have not yet reached me, but I 

 should expect to find them Permian and Upper Coal 

 Measures. This, I hope, will shortly be cleared up. 

 The reddish limestone occurred at 114ft. loin. from 

 the surface, and was 3ft. pin. thick. It was followed 

 by grey sandstones, conglomerates, and red shales, for 

 148ft. 8in., when a bed of white limestone was reached, 

 I ft. thick, at a total depth of 263 ft. 6in. from the surface. 



