Remains in the Oolite Series of England and Trance. 85 



oolites and corals, passing, in the lower part, into a ferru- 

 ginous and calcareous sandstone (calcareous grit of the 

 English). 



4. Argile de Dives (Oxford clay). Black blue clay, rarely yel- 



lowish : in the upper part, subordinate beds of oolitic lime- 

 stone ; in the lower, marly limestone of a gray, yellowish 

 or blue colour, apparently represents the Kelloway rock. 



5. Cornbrash? 



6. Forest Marble, consists of a series of beds more or less 



oolitic, and more or less sublamellar, is very often fissile, 

 and contains fragments of shells and corals. 



7. Great Oolite. Upper beds sometimes resemble forest mar- 



ble ; middle and lower beds of a finer grain, rarely oolitic, 

 not sublamellar, often as soft as chalk. Caen stone belongs 

 to this division. M. de Caumont considers the clay of 

 Port-en- Bessin as equivalent to the Caen stone. 



8. Inferior Oolite. Upper part resembles the Caen stone; con- 



nection between the great and inferior oolite. In the lower 

 part, two or three beds of yellowish or gray calcareous 

 sandstone, containing ferruginous oolites ; full of shells. 



9. Lias. Upper part contains belemnites; and the lower, the 



Gryphaea incurva. — There seems an equivalent of the 

 sand and marlstone of Smith upon the top of the lias. 

 The above is condensed from the general descriptions con- 

 tained in the TLssai sur la Topographie Geogiiostique du De- 

 partement du Calvados. It will be found not to differ materially 

 from the general view 1 presented in my paper on Normandy, 

 if the Portland beds be withdrawn and the marl and marl- 

 stone there noticed be considered equivalent to the Kim- 

 meridge clay, except indeed that M. de Caumont considers 

 the Port-en-Bessin marls as representing the Caen stone. 



General View of the Oolite of the North of trance {according 

 to M. Boblaye). 



The rocks of this class which M. Boblaye had occasion to ob- 

 serve, 



12. Bed of black flint, passing into a gray sandstone, and > , /. ^ 



finally into the limestone S 



13. Many limestone beds passing into sandstone 4 



14. Yellowish limestone without shells, many beds 5 



15. White marl 1 



16. Yellowish white limestone containing casts of spiral shells... G 



17. Whitish marl 1 



18. Limestone resembling No. 16 2 



19. Limestone full of corals (coral rag) 6 



20. The same, more cun)])act fi 



21. Oolite of the coral rag 



" constitute 



