250 
LAMPLUGH : GLACIAL SECTIONS. 
shown in Fig*. 2 of last years sections. Thence its extension south- 
ward may be traced past Fraisthorpe to Barmston, where it seems to 
leave the coast ; and, still hugg-ing-, more or less closel}^ the inner 
edge of the Wolds, pass inland by Ulrome and Beeford, the waters 
at that period probably finally discharging themselves like the rest 
of the drainage of East Yorkshire, into the Humber Estuary. 
This seems to have been the course of the Gypsey water during 
the comparatively recent times indicated by the fine chalky gravel 
No. 2 of the sections. At this time the head issuing from the wolds 
was great enough to carry the flood over a country almost level, the 
fall between Bridlington and the Humber not being more than about 
25ft., though the level of the land may have stood somewhat 
higher at that time. But as the volume of water decreased, so 
that circulation through a wide spread body of shallow water could 
no longer be sustained, marls and peats commenced to form in the 
lower portions of the flooded country, in part contemporaneously 
with the gravels in the direct streamway, and their deposition, in 
some places, did not cease till the time of artificial drainage in 
Holderness. 
Prior to the period of this, the Gypsey Gravel," the stream 
from the mouth of the valley seems to have been strong enough to 
penetrate further east before being deflected, sweeping past old 
Bridlington but curving round southward before reaching Sewerby, 
its outer limits and curve being nearly coincident with the 50ft. contour 
line. Higher ground standing where now the sea is, a continuation 
south-eastward of Potters Hill, perhaps, seems then to have 
deflected the stream along a course nearly due south, causing it to 
pass to what is now the seaward of Bridlington Quay, and then south- 
eastward across towards Auburn, and so inland, as indicated in part 
by the dotted lines in the plan. The stream would thus sweep round 
the knoll of boulder clay on which the Quay stands ; and evidence 
of its course is found in the gravel (No. 2 of Part I), whose feather 
edge may be traced along the top of the North CHff into the town. 
Towards the harbour this thickens considerably ; and I think that 
where the harbour now stands, once formed part of the hollow, 
containing gravel and freshwater marl, which is seen in the cliff 
