458 LOWER OOLITIC HOCKS OF ENGLAND: 
(termed the "Clays of the Cornbrash"), which pass gradually up 
into the yellow argillaceous base of the Kellaways Rock.* These 
shales evidently correspond, stratigraphically, to the clays which, 
in the southern and midland counties of England, form the base- 
ment-porUon of the Oxfordian strata. 
* Geol. of Oolitic, &c. Bocks south of Scarborough, p. 10 ; Jurassic Eocks of 
Yorkshire, vol. i. pp. 261, &c. 
