392 
LAMPLUCH : GLACIAL SECTIONS. 
clean sand (4a), and below it, a curious bed of earthy rubble full 
of very small chalk pebbles, looking like a surface wash (46). 
But as I have already described these beds in the " Geological 
Magazine" for Sept., 1870, I need not here enter into further 
particulars. 
The Basement Clay (5), of section No. 1, with its included 
masses of clay and sand with arctic shells (5b) forming what has 
long been known as the ' Bridlington Crag,' is of great interest, 
and I have made it the subject of a separate communication, 
which was read at the British Association Meeting, at York, last 
September, and has been printed in the "Geological Magazine." 
for Dec, 1881. It is therefore needless here again to describe it. 
I may however mention the occurrence above the Basement 
Clay, just before its disappearance in section 1, of what looked 
like a re-arranged wash from its surface, in the form of a dark 
silty mud with pebbles and worn shells (derived from the clay?), 
which gave out a foetid odour, and appeared to me rather of 
fresh-water origin than marine. This silt filled a very sudden 
and deep hollow in the Basement Clay at B to a depth of about 
16 feet, and caused much trouble during the building of the sea- 
wall, as no foundation could be got in it ; it was in the end bridg- 
ed over. It is probably of the same age as the earthy rubble 
below the laminated clay in the Section No. 2, (6), already refer- 
red to ; indeed it is possibly the continuation of it. 
Such is as faithful an account as I can give of these two in- 
teresting sections ; and there remains only to add such inferences 
that I have drawn from them as may seem worthy of record ; 
either as showing what were the impressions given to an observer, 
or as indicating the standpoint from which I may have described 
the beds. 
Notes and Inferences. The most striking feature of these 
sections is the fantastic contour of the line between the Purple 
Clay and the gravel ; and I have carefully sought for any clue 
which might help me to comprehend the method of its formation, 
