66 



ME. L. RICHARDSON ON THE RH^TIC OF [Feb. I9II. 



The principal section in the Radstock district is that which is 

 exposed in the railway-cutting at Chilcompton. It has been very 

 briefly noticed by Mr. H. B. Woodward. 1 



r? 



2 S' 



Section in Chilcompton Railway-Cutting. 

 Thickness in feet inches. 



Limestones, rubbly, white, 



mixed with marl and clay 



seen 



Limestone 



Marly clay or rubble 



Limestone, usually in three ) A 



beds \° 



; l 



i 



p 



H 



pq 



H 

 P 



LB 



Clay,tough, black and brownish. 

 Cotham Marble. Typical" 



1. <i arborescent form,mammillated 

 top : 5 to 9 inches 



f Marls, pale greenish - yellow, " 



2. < darker in places, especialby at 

 (. the base 



Limestone, pale - 3'ellow and~ 

 bluish, argillaceous and very 

 conspicuous, with a thi 

 greyish - green, rather gritty 

 layer above it, containing fish- 

 remains : to 8 inches 



C Shales, marly, passing down 



( into 



5 a. Shales, black, marly 



^ , C Sandstone in thin laj^ers, with 



( clay-partings 



6. Shales, black 



C Limestone, grey, micaceous, 



tj J arenaceous in several layers 



' 1 with clay-partings ; conspicu- 



L ous 



?8to C Shales, black, thinly-laminated . 

 14. { Shales, black, non-laminated ... 

 Bone -Bed. Greenish earthy 

 limestone, crowded with the 

 usual fish-remains, and con- 

 taining a few derived frag- 

 ments of Tea -green Marl; 

 quartz -pebbles : 5 to 2f inches. 



1M 



Tea- 



f GREEN 



p3 I Marls. 



H I 



M I Red 

 ^ Marls. 



Non-sequence. 



Marl, soft, greenish: 4 to 8 

 inches 



Marlstone, earthy, greenish- 

 grey, conspicuous : 2 to 6 

 inches 



Marls and earthj' marlstones . . . 



Marlstone, earthy : 3 to 7 



inches 



JMarls, soft, bluish-green : about 



Marls, red. 







1 seen. 



10 



C Isocyprina ? ewaldi (Bor- 

 2 < nemann), Protocardia 

 q (. rhcetica (Merian). 



o C Isocyprina ewaldi, Chla- 

 \ mys valoniensis (Defr.). 



( Saurichthys acuminatus 

 Ag., Sargodon tomicus 

 Plien., Gyrolepis alberti 

 Ag., Acrodus minimus 

 Ag., fish - vertebra?, and 



t_ coprolites. 





6 



6 



}° 



6 









4 





J 

 3 









}• 



5 





8 











12 



3 



r x ' Geology of East Somerset & the Bristol Coal-Fields ' Mem. Geol. Surv. 

 1876, p. 79. 



