PRESTWICH — ON CLIFF SECTION AT MUNDESLET. 
69 
sands and gravel above it, is 
there exhibited in fall detail 
and great variety. It is our 
type section of the Grlacial 
period. In the interesting 
account of this coast given by 
Sir Charles Lyell * in 1840, 
one place is noticed, where, 
owing to the wearing away of 
the cliff considerable changes 
have since taken place, and 
a section of importance has 
been more clearly exposed 
than it was at the period 
referred to. I allude to the 
section at Mundesley, where 
the Freshwater deposit was 
thought to be intercalated in 
the Boulder clay — an anoma- 
lous position and one difficult 
of explanation. 
In my paper read before the 
Royal Society, in May, 1859, 
speaking of the flint imple- 
ment-bearing strata at Hoxne, 
I mentioned Mundesley, 
amongst other places which 
are probably synchronous with 
it. I am therefore desirous to 
show, briefly, the nature of the 
resemblance, and to prove that 
this Freshwater deposit really 
overlies the Boulder clay and 
is not intercalated in it. It is 
not as a matter of controversy 
that I now bring the subject 
forward, but merely as one of 
fact, for I believe that all 
geologists who have lately 
visited the spot, including Sir 
Charles Lyell himself, now 
view the section in the same 
light. (See section, fig. 1.) 
I was at once satisfied that 
such was the order of super- 
position when first I visited 
* Phil, 
p. 353, 
Mag. for May, 1840, 
