34 



Mr. De la Beche on the Lias of the Coast, 



nearly complete section of them_, between Seven-rock Point and the large 

 fault at the bottom of Pinhay Bay. The lias marls come close down to the 

 point ; after which the following beds occur, in a descending order : 



Section of the Ljas Limestone beds, near Seven-rock Point. 



} 

 } 



} 



Grey limestone 



Slaty marl .... 



Grey limestone (with a seam of nu. 

 merous flat ammonites at the 

 top) 



Dark marls (containing an inter, 

 rupted line of limestone. — Pec- 

 tens in the marl) 



Greyish limestone . 



Dark slaty marl 



Grey limestone 



Marl, and slaty marl 



Grey limestone 



Dark marls .... 



Grey limestone (varying from 6 

 inches to 1 foot) . 



Dark slaty marls . 



Rather compact grey limestone 



Dark slaty marls . 



Grey marly limestone 



Thin seam of slaty marl . 



Two beds of rather compact grey "n 

 limestone, separated by a thin > 

 seam of slaty marl . . J 



Slaty marls .... 



Grey limestone, with Plagiostomae 

 (varying from 4 to 6 inches) 



Thin seam of slaty marl . 



Grey limestone (varying from 4 to 



6 inches) .... 

 Thin seam of slaty marl . 



Grey limestone (varying from 4 to 



7 inches) .... 

 Thin seam of slaty marl . 



Grey limestone . . . . 



Thin seam of slaty marl . 

 Grey compact limestone (varying 1 

 from 6 inches to 1 foot) . J 



Thickness. 

 Ft. In. 

 10 

 3 



7 



3 



. 



9 



1 



2 







8 



. 4 



6 



. 



8 



1 











9 



1 



4 



. 



7 



. 2 







. 



7 



. 







1 



3 











5 















5 















6 















4 











9 



Slaty marl .... 

 Grey limestone (2 to 4 inches) 

 Thin seam of marl. 

 Grey compact limestone (8 to 12 



inches) .... 

 Slaty marl .... 

 Grey compact limestone 

 Thin seam of slaty marl 

 Thin bed of grey limestone 

 Thin seam of slaty marl 

 Grey limestone (varying from 4 



to 10 inches) 

 Thin seam of slaty marl . 

 Grey limestone (2 to 4 inches) 

 Slaty marl .... 

 Grey limestone^ 

 Slaty marl . 



Limestone . J>in thin beds 

 Slaty marl . 1 

 Grey limestonej 

 Dark slaty marl 

 Six thin beds of grey limestone, 



alternating with five thin seams 



of marl 

 Marl . . . • . 

 Grey limestone 

 Three thin beds of slaty marl, 



with three alternate beds of 



grey limestone . 

 Slaty marl . . . . . 

 Alternations of thin limestone 1 



beds with marl beds . . J 



Marl 



Grey limestone (6 to 8 inches) 

 Slaty marl .... 

 Compact grey limestone (4 to 6 



inches) .... 

 Dark marl .... 



Thickness, 



Ft. 



In. 







8 







3 















10 







10 







4 



one,"N 

 iams > 



} 



3 



7 







3 



4 



10 



9 



3 6 



5 

 3 



2 



} 







4 



3 











10 







7 







8 







5 







4 



