LIFE-ZONES IN THE URITISn CARDONIFEROUS ROCKS. 



21: 



It is somewhat remarkable that these shales should be so frequently 

 found ill the bottom of valleys, but this is no doubt due to their being 

 easily scoured out by the streams. Unfortunately they are frequently 

 covered by drift consisting of blocks of grit which have simply rolled from 

 the upper ranges of the hills into the valleys below. 



The lithological succession in descending order is — 



_, . „ . f Thick grits. 

 urit aenes | sandstones and shales. 

 ■ Shales, often micaceous. 

 Shales with bullions and harder limestone-shales, the latter usually 



rich in fossils. 

 Brown shales with large bullions and black limestones, 

 . Dark-blue limestones and very thin shales. 

 Carboniferous f Cherts and limestones. 

 Limestone [ 3Iassif. 



This succession is illustrated by the sections following : — 



1. Mam Tor, E. Face, towards Castleton. ' C and' D' on G" Map. 

 Thickness Loeftlity 



2 kv. ' k.vvC ' Ck'*; ^^:^^ Lowest thin sandstone. Base of 



grit series. 



Pendleside 



Series 



15 



6 



10 



4 

 1 



11 



8 

 10 



35 



Black thinly bedded shales. 

 (lonklla Iwris (small). 



Posi- 



Bullion bed. 



Black shales. 



Glyphioceras sp. [them. 



Bullion bed — no Goniatites found in 



Dark shales, thinly bedded. 



Blue shales, crowded with Pterino' 

 pccien pajryraceus (very large). 

 PuMoniella hens. 



Limestone shale, crowded with Pte- 

 rinopfcten papyracnis. 



Bullion bed. 



Black shales. 



Bullion bed, with Goniatites. 



Black shales. 



Limestone shales. Goniatites. 

 Bullion bed. Goniatites. 



Black shales. 



Limestone shales. Atliyr'is amhigva. 

 rterinopectcn papyraccns. Gly- 

 phioceras apiralc. 



Black shales. 



Bullion bed (?). Dimorplweeras 



caly.r (numerous). 

 Blue shales. Posidojiiella Iwvis. 



Layer crowded with Posidoniella 

 lavis. 



This relation of 

 Pterinopecten 

 shales to base 

 of grit series 

 is corrobo- 

 rated between 

 LeeHouseand 

 Edale Head 

 (see_l" map), 



