THE CORALLIAN ROCKS OF ENGLAND. 



347 



Pig. 15. — Section in the Gorge of the Seven, showing Upper Calcareous 

 Grit faulted against Corallian Limestones. (Length 230 yards; 

 dip about 5°.) 



N. 



Upper 

 Limestones, 



Middle 

 Division of 

 Pickering. 



Details of the Sinning ton Section. 



ft. in. ft. in, 



A. Soil, rainwash, and clay at the fault... 4 



B. Upper Calcareous Grit, consisting of 



(1) " red beds " (a of the Pickering 

 section), (2) a band of hard blue 

 rock, and (3) shaly sands, base not 

 seen about 18 



C. 1. Coral Rag, with plenty of Cidaris 



florigemma in the lower block, at 



the fault 13 



2. Rkabdopky Ilia-bed. The upper part 

 is -very full of small branches. 

 This is the equivalent of the Coral 

 shell-beds of other places 2 3 



D. Coralline Oolite. 



a. Comparatively unfossiliferous lime 



stone, the lower portion impure 

 and dirty (e of the Pickering 

 section) 11 



b. Che?nnitzia-\imestones. The great 



shell-bed at the top is charged 

 with Chemnitzia keddmgtonemis, 

 Nerin<za sp„ Astarte ovata, Lucina 

 Beanii, &c. Noted also Ech, 

 scutatus (/ and part of g of 

 Pickering section) 17 9 



c. Impure bluish limestones, with a line 



of scattered pisolite (remainder of 



g of Pickering section) 6 



50 



E. Trigonia-beds and Middle Grit (h and 



i of Pickering section plus the re- 

 mainder of the Middle Calcareous 

 Grit) 34 



F. Top of the Lower Limestone series ... 5 



111 



