LAMPLUGH : GLACIAL SECTIONS NEAR BRIDLINGTON. 
283 
derived from the secondary formations, masses of Liassic shale and 
Neocomian clay occurring, the former, among other places, in Filey 
Bay," and at Bridlington,! and the latter at several places on Flam- 
borough Head4 The conditions under which these masses of the 
older formations are found exactly parallel, the occurrence of the 
shell bearing- patches, the original bedding being sheared and shaken, 
but not obliterated, the fossils being preserved, though generally 
fractured, and each mass forming an isolated ' boulder ' in the clay. 
Some of them, we know, must have travelled no inconsiderable 
distance, as, for instance, the patches of Lower Lias at Filey and 
Bridlington, which cannot have journeyed for less than several miles, 
even if we allow that strata of this age may crop out in the bed of 
of the North Sea, nearer than on the coast line. 
With such distinct proof of transportation from a distance in 
some cases, we can scarcely resist the conclusion that in others also, 
though the evidence is less decisive, the beds are likewise far from their 
original positions, especiall)^ in the case of the shelly patches, which 
possess characters showing that they can hardly have been formed in 
the neighbourhood in which we find them. It has indeed been 
suggested that the shelly patches may be remnants of beds which 
occur in places lower in the section, but we found nothing to sup- 
port this view in the boring on the foreshore, presently to be des- 
cribed, and it is still more strongly negatived by the evidence of the 
shell-bed recentl}^ discovered at the South Sea Landing, where 
"the whole of the drift series resting on solid chalk is exposed 
in section, and where there is not the slightest trace of fossils, 
nor even of marine action of any kind, in the stratified beds below 
the Basement Clay. 
Thickness and Extent of the Basement Clay. — So long as the 
only places where the Basement Clay could be studied were the 
limited sections of Bridlington and Dimlington, we were unable to 
prove wdiether its peculiarities were p^ersistent and worthy of being 
made the basis of a division, or whether they were nothing more than 
* Quart. Journ. Geol. Soc, vol. xlv., p. 580. 
t Phillips' Geology of Yorkshire, 3rd ed., p. 85, and Rep. Br. Assoc. 1874. p. 84. 
X Proc. Yorksh. Geol, and Polyt. Soc , N.S., vol. vii., p. 244. 
