DAKYNS : GLACIAL BEDS AT BRIDLINGTON. 125 
traceable ; so that it seems best, at all events provisionally, 
to take the Sewerby gravel as one, the lower part of which 
is of decidedly glacial, though it may be late glacial, age ; 
while the upper part may or may not be post-glacial. Into 
the interesting question of the precise relation existing 
between the crushed and the evenly-bedded gravels, I cannot 
enter now. On the south side of the town there is a cliff 
corresponding to that on the north side ; and the shape of the 
ground suggests that the two were once continuous before 
the erosion of the valley in which the town stands. The 
section on the south is as follows : — at the top very chalky 
gravel resting on an eroded surface of sand, but at one spot 
dovetailing therewith; below the sand (speaking generally), 
beds of finely-laminated sandy clay (Phillips' warp) ; and 
below the warp, gravel not continuous, but lying in hollows 
of the boulder clay, which forms the base of the cliff. The 
bottom gravel has in places a rather glacial look ; and near 
Apple Pie Cottage, where the greater portion of the beds form- 
ing the cliff have been denuded and replaced by recent 
lacustrine and fluviatile deposits, the small portion left of 
the older beds, consisting of gravel and sand, partly abuts 
against a wall of boulder clay and partly is overlaid by 
boulder clay. 
Amongst the overlying beds of warp, sand, and gravel, 
there are few, if any, undoubted signs of glacial action. At 
one spot, however, in the midst of the beds of fine sand, 
and warp, a large boulder is lying imbedded ; at another 
spot the laminae of the warp are contorted or crumpled. 
The warp passes into sand and gravel, or thins out 
northward, so that it does not reach to the site of the town. 
The most remarkable thing in the south cliff is a band 
of convolutions in the sand above the warp. These seem to 
occur only along one horizon. They are for the most part 
exact!}*- like concretions in sandstone ; some few of them 
