KIMMERIDGE CLAY. 
97 
FOSSILS OF THE KIMMERIDGE CLAY. 
Wood, agreeing in structure with dicotyledonous plants ... 
Ostrea deltoidea (Min. Conch, and Smith, Strat. ident.) 
Belemnites lateralis 
Ammonites plicomphalus ? 
Fragments of ammonites 
Elloughton. 
Kirby-Moorside, near Helms- 
ley, Elloughton dale, and 
W elton. 
Brantingham. 
Kirby-Moorside. 
From Settrington and North 
Grimston. 
The fossils of the Kimmeridge clay in Yorkshire, owing to the rarity 
of its exposure, are yet very imperfectly known. Ostrea deltoidea is 
believed to be characteristic of the lower part. It occurs at Elloughton, 
within a few feet of the red chalk ; proving the great unconformity of 
strata beneath the Yorkshire wolds. (See Section No. 9-) 
FOSSILS OF THE UPPER CALCAREOUS GRIT. 
These are not numerous, nor has the stratum itself much attracted 
the notice of geologists. (See Philosophical Magazine for April, 1828.) 
The few ammonites and pectines which I have seen in it, are also found 
in greater abundance and perfection in the lower calcareous grit. 
o 
