LAMPLUGH : GLACIAL BEDS. 
169 
north of Speeton Gap. It is here that it was observed by 
Professor Phillips, and at this point it is 105 feet above high- 
water mark, but appears to sink rapidly over the steep 
denuded slope of the Secondary clays, as I have found traces 
of it considerably lower in New Closes Cliff, and again along 
the cliff foot as far as the ravine known as The Gill. 
But as this interesting deposit has no direct bearing on 
the division of the drift, it will be unnecessary on this occa- 
sion to enter into further details respecting it. 
In the exposure already mentioned, which I saw on the 
beach opposite to the village of Heighten, and which was 
afterwards visited by Mr. Dakyns and myself, the following 
sequence was observable, the beds apparently dipping towards 
the cliff, commencing with the lowest beds, those nearest low 
water : — 
1. Highly contorted Upper Kimmeridge Shale. 
2. Thin band of black silty mud, with broken fossils, being a 
re-arranged form of the underlying clay. 
3. Band of fine Chalk rubble, with a streak of sand. 
4. Brown Boulder Clay, with many stones — no shells. 
5. Bluish Boulder Clay, with Shells, and with streaks of clean clay 
containing many Shells, mostly crushed. 
Note. — These Shells had a facies totally different from that of the pre- 
viously mentioned Shell-bed. 
6. Patches, here and there, of a clean brown clay (without stones). 
7. Greenish-purple Clay, with a few Shell fragments. 
The exposure in which this series was seen was about 
500 yards in length by 30 in breadth. 
Here the next bed above the Chalk-rubble was a band of 
brown Boulder clay, with many stones. Of course, as this 
was a horizontal exposure, and the angle of dip being also un- 
certain, it was impossible to estimate exactly the thickness of 
this band, but it did not seem to exceed three or four 
feet. 
As I do not know of another section in Yorkshire in 
