OF THE CARBONIFEROUS STRATA. 



187 



yJs. 



Stony grey SLalo 6 



Very black Shale, containing the 



avicula (pecfen), goniaiites, &c. 14 



Coal 



Shale Floor 1 



Coarse-grained Rock 8 



Dark Shale, full of the avicula* 

 (peden), posidoiiia, and gonial 

 tiles, mixed with ferns, lepido- 



dendra, &c 



Voal (Feather edge) 



Rough, or Quartz Rock, full of large 

 rounded Quartz Pebbles (Old 

 Mother Rock of Wemeth,&o.)... 12 



1 6 



2 3 



{ 



Principal mine of Buxton, 

 Whaley Bridge, Walmersley, 

 Lomax Wood, Fecit, and Bir- 

 tle Dean. The lowest mine 

 worth working in the vicinity 

 of Bury. 



This rock is often taken for 

 one of the millstone grits. 

 It is exposed at Charles- 

 worth, Wemeth Low, Broad- 

 bottom, Charlesworth, Black- 

 stone Edge, Birtle Moor, 

 Baldingstoue, Cribden, An- 

 glezark Moor, Pillsworth, Hol- 

 combe, Turton Tower, Hor- 

 wich Moor, Grimshaw Delph, 

 Parbold, and Harrock Hill. 



Grey stony Shale, often approaching 



to Flags 25 



Rough flaggy Rock, provincially 



termed "Rag" 4 



Fine smooth Flags 2 



Strong brown Stone, parted with 

 Shale, containing thin beds of 



Flags SO 



Fine-grained Rock, of a bluish colour 2 

 Grey Shale 8 







Edgeworth, Sunnyside, Row- 

 ley Moor, Fo Edge, Summit, 

 Shawforth, and Fullwood, 

 Yorksh. 



* This and the next named bed of marine shells are very constant, bat the first 

 three beds are not always met with. 



