18 
( 11 ) On most of the less elevated or less steep inclines, 
the last mentioned deposit is overlaid by, and passes 
upwards into a very similar layer, distinguishable 
b}^ a darker colour, and more earthy consistency, 
and containing like angular sea and worn fragments. 
In this bed, the flatter fragments of stone are 
noticeably disposed in planes parallel to the slope 
of the sward. It is this last-named bed which 
Mr. Binney traced as blackish brown clay, with 
angular fragments up to 262 feet above the sea. 
The position of these two beds of clay at the 
foot of sea worn cliffs, the almost total absence of 
rolled stones, the entire want of tidal or current 
assortment of material, and on the other hand the 
predominance of sharp angular stones, their pro- 
miscuous aggregation, and the slight bedding along 
the surface line mark them as not marine and as 
subaerial. The upper formation is much modified 
by the gradient of slope and the luxuriance of 
vegetation. 
The clayey matrix probably arises from decom- 
position of the rock fragments ; but the occasional 
occurrence of rounded pebbles of greenstone, &c., 
may indicate a redistribution of patches at least of 
boulder clay. 
It is in these two beds, and especially in the 
upper one, that observers have found shells of 
mussels, oysters, limpets, and periwinkles. Mr. 
Dancer apparently was the first to mention these 
remains in Manchester, and Mr. Sidebotham (from 
whom Mr. D. received his first specimens), shortly 
after exhibited large collections. In 1861, Mr. 
Binney mentions having tracked these shells up 
the hill towards a bed of shingle at a height of 
400 feet, and deduced proof of the elevation of this 
Head at least that height during a very modern 
epoch. 
