145 
THE FLAMBOROUGH DRAINAGE SECTIONS. BY G. W. LAMPLTJGH, F.G.S. 
During the past winter the village of Flamborougli has been 
thoroughly drained, and the deep trenches cut for this purpose re- 
vealed some excellent sections of the drift deposits which cover the 
chalk over the greater part of the headland. 
The village stands on slightly undulating ground, from about 
120 to 150 feet above the sea-level, and is nearly a mile from the 
nearest point of the sea-coast. In a recently-published description 
of the drifts of the headland" I have traced the course of a well- 
marked chain of gravel mounds for four miles south-eastward, along 
the northern edge of the promontory from Speeton to Thornwick, 
and thence southward across the headland into Bridlington Bay. 
This chain, which seems to have had its origin at the margin of 
the ice-sheet, is generally found to lie not far within the edge of the 
area covered by the glacial deposits ; and while the drifts to the sea- 
ward of the mounds almost everywhere overspread the old chalk sur- 
face in thick masses, obliterating its minor inequalities, they form to 
the landward only a thin superficial covering, which soon thins out 
and entirely disappears. Flamborougli lies in the bend of this chain 
of mounds, and consequently, as the drainage sections showed, the 
drifts thin away rapidly to the westward, but thicken in every 
other direction from about the centre of the village. Windmill 
Hill at the north end of the village, and Beacon Hill at the opposite 
extremity, form parts of this chain. 
In describing the drainage sections I will commence at the out- 
fall, and follow the line of the main drain to its termination, noticing 
the branches on either side in passing their points of junction. 
The outfall is on the south side of the headland, in a short 
shallow ravine known as Hartendale Gutter, which runs back from 
the cliff about half-way between Danes Dykes and South Sea Landing. 
The cliff section at this place is described (though not figured) in 
the paper already referred to 'p. 397). The drainage-trench, averaging 
4 feet in depth, ran for some distance in the ravine, and then along 
the south-western rim of Beacon Hill, the great sand and gravel 
mound which forms the most conspicuous feature of the south side of 
* Quart. Journ. Geol. Soc, vol. xlvii., p. 384 (August, 1891). 
