174 cole: DRIFFIELD AND MARKET WEIGHTON RAILWAY. 
Ft. In. 
Fine White and Piiik Sand ... ... 0 4 
Chalk Wash, with numerous Flints, Fragments 
of Red Chalk, and Pyrites ... ... 1 0 
The four lower beds are distinctly stratified, and are due to the 
action of water, perhaps percolating under an ice-covering ; the Lias 
Rubble on the top may be due to a subsequent slip. The common 
Gryphwa incurva was ubiquitous, and marks the zone as that of 
A. Bucklandi, 
In the last cutting, 23 feet, before reaching the road from Good- 
manham to Market Weigiiton, the following section, again allowing 
for the dip to the N.E., was obtained : — 
Ft. 
In. 
Limestone and Blue Clay, with Gryphwa 
incurva 
6 
0 
Light-coloured Clays and Limestone : a spring 
at base 
8 
0 
Blue Clay, thinning west... 
3 
0 
Grey Limestone 
1 
0 
Dark Blue Clay 
2 
6 
Grey Limestone 
2 
() 
Dark Blue Clay, almost black, selenitiferous 
full of young of Lima gigantea ... 
8 
0 
On the south side these beds were much contorted, probably from 
slipping, but possibly from glacial pressure, but not on the north side. 
Fossils from these beds are in the possession of Mr. Parkinson, 
of Market Weighton, and may certainly be referred to the A. angulatus 
zone, but whether the lowest bed above-mentioned may be correlated 
with the upper beds of the A. jjlanoi'bis zone, as I am inclined to 
think, must be determined by better authorities ; at all events the 
oyster beds and Pleuromya limestones were not reached. 
On this elevation, traversed at the base by a road known as 
Humber Street, leading from Londesborough to Brough, and supposed 
to be Roman, a quantity of Roman pottery was disinterred from the 
surface soil, consisting of three kinds, viz., fragments of Samian ware; 
thin, smooth, light-grey pottery, such as found by Mr. T. Boynton 
