TABULAR HILLS. 
13 
hundred and thirty feet, to Stonegrave, beyond which place it sinks 
beneath the vale of Pickering. A branch of this range, separated from 
Oswaldkirk bank by the valley of Gilling, extends in a south-easterly 
direction to Malton, where it crosses the Derwent, and, after rising into 
the high ground of Langton wolds, turns again to the south, and passes 
under the chalk-hills at Acklam. Some of the strata which belong to 
this group of rocks, re-appear from below the chalk in the neighbour- 
hood of South Cave, and are continued in Lincolnshire. The surface 
occupied by this district is about one hundred and ninety square miles : 
it includes the following strata : 
Summits and 
edges of the - 
tabular hills. 
Coralline oolite formation. * 
< 
Slopes of the 
same hills. 
5 Upper calcareous grit, containing fossils 
resembling those in No. 
6 Coralline oolite, marked by corals, echi- 
ni, plagiostomae, melani®, &c. 
7 Lower calcareous grit; pinna', gryphaete, 
ammonites, &c. 
8 Gray argillaceous earth, containing many 
fossils at the bottom. (Oxford clay of 
the south.) 
9 Ferruginous or argillaceous sandstone, 
with remarkable gryphaeae, ammonites, 
&c. (Kelloways rock of the south.) 
Of the strata here enumerated, possibly all may be equally extensive, 
but some are more easily traced than others. The Kelloways rock, often 
thirty feet thick, shews itself on the coast at Gristhorpe and Scarborough, 
and in several points inland along the northern escarpment of the tabular 
hills ; it also appears on the eastern side of the Derwent, and in the 
neighbourhood of Cave. Every where, characteristic fossils accompany 
it, and establish the agreement between this rock and that so named in 
Wiltshire, which had been already inferred from geological position. 
The argillaceous stratum, which separates the Kelloways rock from the 
lower calcareous grit, represents in Yorkshire the clunch clay, or Oxford 
clay of the southern counties. It continues along the breast of the 
great escarpment of the tabular hills from Scarborough towards Hamble- 
ton and Wass bank, and is less distinctly traceable where the same range 
turns eastward, by Ampleforth and Castle Howard, but has not yet been 
