Vol. 67.] 



WEST, MID, AND EAST SOMERSET. 



41 



27. 



?l 



[Charlton Mackrell.] Thickness in feet 



26. Rockymarl 



Limestone, massive, often in three 

 laj r ers, the top and bottom layers 

 being very shelly. Towards the 

 eastern end of the cutting, they 

 conjoin and are crowded with a 

 branching coral. This is Bed 29 

 of Moore's Steven's-Hill section, 

 Long Sntton 



28. Pale-brown and green marly shale . 



29. Limestone 



30. Shale 



31. Limestone 



32. Shale 



33. Limestone 



34. Marl and limestone 



35. Limestone 



36. Marl and limestone 



inches. 



7 



C Thecosmilia (?) michelini 

 4 < Terq. & Piette, and Ostrea 

 (. liassica, abundant. 



44. 



45. 



< so 

 L in 



v 



C Limestone, hard, conchoidal frac- ") ft 

 I ture > U 



Marl and rubbly limestone 



C Limestone, cream-colonred, very") 

 ■< massive, often giving off a 3-inch > 1 



(. bed at the base ...) 



Parting of shale 



Limestone, cream-col oured 



Greenish-yellow marly shale and" 

 some limestone fitting into the 

 inequalities of the underlying bed. 

 C Limestone, massive, cream-coloured, ' 

 ■< with some veins of calcite : top very 



(. irregular 



( Pale greenish- yellow shaly marl ") 



\ and some rubbly sandstone ) ° 



fLimestone, cream-coloured, level top,""] 

 most irregular nether surf ace,fitting | 



< into the inequalities of the under- J>q 

 I lying bed, with a little shale inter- 

 im vening 



C Limestone, very massive, some^ 



< veins of calcite, most irregular > q 

 (. surface, apparently waterworn ...) 



Greenish-yellow marly shale : q 



C Limestone, hard, cream-coloured, ") 



\ with pyrite ) 



( Thin impure limestone-layers and \ 

 I marly shale, pale yellowish- green . ) 

 C Limestone, massive, rather irre- ? 

 \ gular, yellow and grey -brown ... j 



C Cardinia sp. (internal cast). 

 \ Nuculana (?) , Plagiosloma 

 1 valoniense (Defrance), Ostrea 

 L liassica. 



Volsella minima and varieties. 

 C Volsella minima, Syncyclo- 

 \ nema sp. 



CCardinia sp. (int. cast), Myo- 

 I concha (?) sp., Gervillia jprce- 

 <j cursor Qu., Pseudomelania (?) ,. 

 j Pleurotomaria (very depressed 

 !^ form). 



" Plagiostoma valoniense, Vol- 

 sella minima, Pholadomya (of 

 Ph.-glabra group ?). 



11 

 4 



11 



0| 



21 



51. Protocardia. 



8 



20 8 



3. 



(1) 



1(2) 



l(3)| 



Brown marly clay 



[Strati graphical position of the 



Cotham Marble.] 



Shales, dark-grey and green, marly . 



C Limestone, fine-grained, light-grey 



< with darker streaks of more crys- 



(. talline rock 



Shales, yellowish and greenish-grey, "\ 

 with thin limestone-layers often f , 

 conjoined to form a single massive C 



bed J 



C Limestone, hard, yellowish-grey : ") ft 



(. average ) 



/"Thin yellowish arenaceous lime- 

 stone, mixed with some marl, and 

 having at the base a very pyritic 

 layer 



2 2 Fish-scales. 



