234 MR. E. W. BINNEY ON THE PERMIAN BEDS 



Professor F. C. Calvert made analyses of these marls and 

 limestone, and found the following results : — 



Marl beds. Limestone. 



Insoluble in acids 68.00 16.00 



Soluble silica 0.33 1.00 



Sesquioxide of iron 7.00 4.66 



Alumina 1.33 2.60 



Carbonate of lime 18.00 63.04 



Carbonate of magnesia ... 5.00 10.33 



Soda 34 and potash 0.66 



32.00 loss 0.69 



83.04 



100.00 100.00 



By the kindness of Mr. Henry Mere Ormerod, I am 

 enabled to give a section of the strata found in sinking the 

 Engine Pit, at Astley Colliery, on the top of Blackmoor, 

 which is as follows : — 



Ft. In. 



Upper portion of the shaft bricked so as lo hide strata. 27 



"Soft white rock 3 10 



Soft red rock 17 5 



Soft gritty white rock 9 



Fine red raddle 1 5 



Soft red rock 1 2 



Gray rock 1 1 



Strong red rock 2 7 



White rock 10 



Strong red rock 3 1 



LSoft red rock 13 6 



Gray stone (bind and lint) * 18 6 



Strong white rock 5 



Gray stone (lint) 11 6 



Soft earth (parting) 1 



Brown rock 1 1 



White gritty rock 9 



Gray metals 10 



Bassy coal 1 



Soft dirt 2 



Clear coal I o 



116 2 



• This is a local term for strong arenaceous shale. 



