LAMPLUGH : GLACIAL SECTIONS. 
387 
' Carr Lane,' a distance of about 1,000 feet. The average 
height of the cliff is about 30 feet. 
Intimately connected with this part of the cliff is the section 
No. 2, which is indeed the northward continuation of it — the inter- 
val between them, only about 100 yards, being hidden behind 
strong low defences which are not likely to break down. I know 
of no part of these cliffs which suffers such rapid disintegration as 
does this short section ; the incoherent nature of the beds, the 
soft destructible character of its base, combined with the increas- 
ed scour of the waves caused by the protections on either side, 
resulting in a destruction so rapid that in a few years the section 
will probably be completely changed, unless artificially protected* 
The ground slopes inland and forms the eastern edge of the 
extensive but irregular hollow which held the shallow lake 
whose relics remain in the freshwater marls of these sections, and 
whose extent and conditions is being admirably laid open by 
the drainage works in the town ; and, unless prevented the sea 
will before very long eat still further back into the lake hollow, 
when the whole section will probably resemble the southern end of 
it as now seen. 
Synopsis of Beds. — The following is an abstract of the beds 
which these sections exhibit : — 
1. Banded freshwater marl, containing many shells and traces of 
plants. 
2 and 2a. Drift Gravels containing a large proportion of chalk. 
3. Dark purple boulder clay, (the 'Purple Boulder Clay ') which in 
section No. 2 splits (3a+ and 3b) and admits a gravel. (2a. ) 
* For the changes which this section has undergone in a short period, 
compare it as now given with a rough sketch of it illustrating my paper in 
the Geol. Mag., Sept., 1879, and with Mr. Dakyns' drawing, Proc. Yorks. 
Geol, Soc, 1879. 
t Although I have here included the upper band of Boulder Clay of section 2 
(3«) as Purple Boulder Clay, it is by no means certain that this may not eventually prove 
to represent the later Boulder Clay, named by Messrs, Wood and Rome the ' Hessle Clay.' 
In fact, throughout I have only used the present terminology provisionally, and until, 
with a fuller knowledge of the beds, a more perfect division with more certain terms shall 
have been suggested and adopted, 
