LAMPLUGII : GLACIAL SECTIONS. 
29 
The cliff line runs N.E. and S.W., and as will be seen, is 
lowest at the northern end, being here only 28 feet above Ord- 
nance datum. In going south there is a rather sudden rise to a 
height of nearly fifty feet, but the cliff begins to sink again at D 
in Fig. 2, where the chalky gravel puts in, and has again lost five 
feet of its height at the southern end of the section. Beyond 
this the cliff sinks regularly and very gradually for about a mile, 
till it disappears below the blown sands of the beach near Auburn. 
Northward of the section there is a slight rise, and the marls 
which occupy the hollow thin out. Except in this hollow, the 
ground sinks from the cliff edge inland. 
The following beds are seen in this section : — 
L Banded fresh- water marl containing shells, plant remains, etc. 
2. Small gravel, chiefly of chalk, with streaks of sand. 
*'2a. Finely laminated and ripple-marked sand and clay. 
*lh. Disturbed glacial gravel, with sand and clay seams. 
3. 3a and 36. Dark purple houlder-clay, (The Purple Boulder Clay), 
inchiding in its midst a band of bedded boulder clay (3c), which 
admits seams of sand at B,B,B. 
4. Finely laminated chocolate-coloured clay, scarcely seen in the cliff but 
well shown on the beach. 
5. Dark greenish-blue boulder-clay (The Basement Clay), containing 
many shells and shell-fragments. It nowhere rises above high- 
water mai'k in this section. 
The Freshwater Marls. (No. 1). These marls are only 
seen at the northern end of the section, and are very similar to 
those on the other side of the town which I desciibed last year,j" 
and I believe the two join, as they seem to reach from both 
sides into the hollow behind the town. Their greatest thick 
ness in this section is 7 feet. They show an irregular and 
intermittent seam of peat in their midst, containing^ remains of 
beetles, seeds and plants. Where thickest, their lower layers 
consist of gritty clay, and apparently have a tendency to pass into 
* I lia^e numbered these beds somewhat arbitrarily to make the figures below 
agree with tliose in my last year's sectien. I do not implj there is any connection 
betw^een 2 and 2a. 
t Proc. York. Geol. and Folyt. 8oc., 1881, p. 383. 
