198 



J. F. BLAKE ON THE KIMMEEIDGE CLAY OE ENGLAND. 



than the lower beds, and appear to be nowhere so completely 

 developed as in Kimmeridge Bay and the coast to the east, the 

 strata in that locality belonging almost exclusively to this division, 

 proving that by no means all of the formation is here exhibited (as 

 Fitton supposed), though its upper portion is here extraordinarily 

 developed. I have carefully measured the beds in this coast-section 

 as far as accessible ; and though cut through by many small faults, 

 their succession is very plain, and gives a total thickness of this por- 

 tion of the series of 650 feet, which may be regarded as the maxi- 

 mum in exposed sections. 



The following is the section, omitting the minor details ; and the 

 beds gradually dip to the east. This section begins where the 

 highest beds are seen, and goes westward : — 



Section on the Coast at Kimmeridge, between Chapman's Pool and 

 Hen Cliff. 



Lithology. 



Thickness, 



Observations. 



Bagged limestone blocks 



More stratified limestone 



Black slaty limestone ? 



Bluish white fine-grained \ 



limestone J 



Blue slaty limestone 



Hard blue limestone 



Hard blue sandy clay 



1. Blue laminated clay 



2. Hard slaty shale 



3. Soft shale, with indurated \ 



bands J 



4. Dicey clay 



5. Hard band 



6. Blue clay 



7. Dark and sulphurous clays... 



8. Indurated band 



9. Blue laminated shales, in- \ 



durated in the middle ... J 



10. Hard white slab, with paper- "1 



stratification J 



11. Softer shale, alternating! 



with white paper-slabs... J 



1 2. Very solid paper-slab 



13. Blue dicey clay 



14. Cement-stone 



15. Blue dicey clay 



Forward 



ft. in. 



22 



20 



44 



2 



24 



4 10 



150 



-°{ 



70 



2 



°{ 



77 



12 



2 



24 6 



18 



2 

 20 



23 6 







Thickness estimated. 



Inaccess- 

 ible here. 



J 



Unfossiliferous down to this 

 leyel and gradually changing 

 into the next. 



Am. biplex, Astarte lineata, Bel. 

 Soui'ckii. 



Fossiliferous. 



Am. bijplex, Exogyra, Leda, Be- 

 lemnites Souichii, Lima, sp., 

 Ostrea; measured obliquely, 

 and estimated. 



Fossils in layers. 



Cardium striatulum, Avicula 

 vetticata,Am.biplex, Fecten lens. 



Fossiliferous bands and large 

 nodules. 



Discina latissima, Lingula 



263 8 



