14 
I. B— Sea Beach and Beach Marks. 
(3) Mr. Binney had described a bed of shingle at 400 
feet in the valley of the old road. 
(4) Mr. Bonney had described as an indication that the 
surface of the higher ground has in many cases 
been affected by ice, large blocks of limestone 
scattered about, especially on the north-west of 
the hill, differing from the rock on which they lie, 
but of a stone found in situ on a slight eminence 
in the neighbourhood, 
The author believed these rocks to have no 
glacial origin, but to be raised beach — the remains 
of the rage or play of waves about the new-born 
island. 
He had not found any boulder of other stone 
than that of the hill, and could not indicate any 
other origin for these elsewhere. Puffin Island 
and Anglesey to the west are much lower, and 
Penmaen Rhos to the east lies out of any hitherto 
described extension of the North Wales glacier 
system. 
(5) The plateaus furnished other indications of sea- wear, as 
on many of them the limestone stratum is uniformly 
denuded of all superincumbent stone, and cut and 
worn in fissures and other forms very similar to 
those of like beds between tides below. Whether 
this erosion is that of ancient waves, or of rain 
water, since elevation the even stripping of the 
overlying stratum indicates aqueous denudation. 
A similar or even more marine looking scar 
forms the top of Little Orme’s Head. 
The vertical outlines consisting, when not hid- 
den by talus, of alternate cliff and scar, and the 
grand curves of successive contour lines of the 
Head are thoroughly marine. 
