I860.] 



WEIGHT — HAS AND BONE-BED. 



383 



r h. Thin band of dark grit, containing ft-. 



scales and teeth of Fishes 



i. Dark-grey shaly marl 4 



J' Upper Pecten-bed; a dingy- coloured 

 pyritic limestone, containing Pecten 

 Valoniensis, Defr., Cardium Bhaticum, 

 Mer., and other shells ivndctennined . . 



k. Grey marl 



Z. Band of limestone with Pectens and 



gypsum 



m. Dark marl 4 



n. Lower Pecten-bed; a dark pyritic lime- 

 Zone of stone, containing Pecten Valoniensis, 

 Avicula *<! Defr., Avicula contorta, Portl., and 



contorta. Anomya, sp 



o. Dark marls 3 



p. Laminated shale 



q. Dark marl 1 



r. Stony band or impure limestone 



s. Coprolite-bed {Bone-bed) ; teeth, scales, 



and coprolites 



t. Dark shaly marl 3 



u. Band of stone 



w. Dark indurated marl 2 



x. Band of stone « 



y. Dark indurated marl, resting on a pebbly 



^ conglomerate 3 



Green Keuper marl. 



[I am indebted to my friend Mr. Day, of Weston-super-Mare, for 

 assisting me to complete the details of the lower beds of the above 

 section.] 



In this cutting the uppermost portion of the grey marls of the 

 Keuper are overlain by a thin bed of conglomerate, formed of small 

 round quartz-pebbles (//) ; on this the first bed of black shale rests. 

 The Bone-bed is now with difficulty found in situ ; portions of it, 

 however, are among the spoil on the bank. In blocks of sandstone 

 I found tin: teeth (AXiutrichtltiis, I/y/mdus, Qyrole/pis, and fragments of 

 bones and coprolites. This thin band of dentifero'us sandstone is 

 inters! ratilied with the black shales. 



The Lower Pecten-bed is a dark, slate-coloured, pyritic, semi- 

 indurated shale, containing several compressed Conchifera. The 

 only species that I could determine was Pecten Valoniensis, Defr. 

 The dark shales (m) above this bed contain tew, it' any. fossils; 

 but impressions of shells are seen sometimes between the lamina-. 



The Upper Pecten-bed (j ) consists of a hand of hard, greyish, argil- 

 laceous limestone, from 8 to 10 inches in thickness j it is traversed by 

 veins of crystallized carbonate oflime, and contains many fossil shells. 

 I collected from two or three blocks Pecten Valoniensis, Defrj 

 Cardium Bhaticum, Mer., Modiola, Myosites, Avicula contorta, 

 Portl., and Anomya. As small blocks of this bed can now only be 



in. 



H 

 6 



