47 
the 7niddle lias formation, the lower division having been planed 
down by denuding agents to the level of the Vale of York, 
instead of standing out in hills, as it does further north at 
the village of North Cliff, etc. 
The upper lias also is not seen anywhere in the cuttings, but 
it doubtless exists in the low ground to the east. Passing over 
this by the railway embankment (2,508 feet) we enter a second 
cutting, about twelve feet deep, where a set of pale-coloured 
oolitic limestones is exposed. It is a well-bedded rock, and the 
surfaces often shew numerous fragments of shells and branches 
of the little millipore, known as Cricopora strmninea. A few other 
fossils have also occurred, namely— Trigonia conjwigens, Lima 
pectiniformis, Hyhoclypiis^ etc. Altogether this rock and its 
fossils agree well with the Millepore rock of Yorkshire, especially 
as it is developed in the neighbourhood of Castle Howard 
Railway Station. Much of the stone is blue-hearted. 
Our next exposure is the fine Drewton section, shewing a 
magnificent development of the Kelloway rock and part of 
the Oxford clay ; a] so drift and gravel capping the hill. 
The Kelloway series forms the greater part of this section, 
its total thickness amounting to thirty-five feet, and extending 
from one end of the cutting to the other, lying at an angle of 
five degrees. The series is conspicuously divided into two 
divisions—the rock bed above and the sands below; and the 
latter may be again divided into the (1) lower sands, pure and 
white, highly micaceous, and, notwithstanding its incoherence, 
well jointed, in which no fossils were found (five feet), and (2) 
the remaining twenty feet consisting of ordinary pale yellow 
sands, with iron-stained patches. Two small irony bands, 
somewhat more hardened, and crowded with casts of belemnites, 
occur in the lower part of this series, and in the upper portion, 
which is more deeply iron-stained, there is a double line of 
large boulder-like masses or concretions, of a hard and siliceous 
nature. Shells of Myacites and Belemnites occur in them. A 
number of these nodules are still seen standing out promi¬ 
nently on the sides of the cutting. 
The next succeeding bed is the most conspicuous rock in the 
cutting, forming a bold rocky ridge along the whole section. 
