1 878.1 
Superficial Gravels and Clays. 325 
seen to be gradually covered by the brown clay, and at about 
100 yards east of Castlehill Station the sedtion exhibited 
was as shown in Fig. 11. 
Fig. 10. 
East End of Castlehill Gravel-pit. 
Surface soil. a, x. Unstratified brown clay, with a few scattered pebbles. 
a, 3. Whitish gravel in clayey matrix, succeeded by alternations of ferruginous 
gravel and seams of sandy clay. c. Sand and very sandy gravel, sometimes 
false-bedded and with lenticular patches of sand in upper part. Base not seen. 
Railway-cutting ioo yards East of Castlehill Station. 
s. Surface soil. a,t. Unstratified brown clay, with a few scattered pebbles. 
a, 3. Gravel in brown clay. c. Very sandy subangular gravel, with lenticular 
seams of yellow sand. Base not seen. 
At Ealing Station a fine sedlion was for a long time ex- 
posed, and I had the pleasure of showing it to Professors 
Morris and Bonney. It is represented in Fig. 12. 
In it, the irregular patches of gravel a, 2 are more fully 
represented than is generally the case. Usually this divi- 
sion in the valley beds is only marked by a waved line of 
pebbles. At Ealing Station it consists of lenticular patches 
of mostly rounded pebbles lying on an extremely irregular 
surface of the clay below. They look as if they had been 
dropped whilst the beds below were so soft that the masses 
of gravel sank into them where they fell. 
I might multiply instances and heap example on example 
to show the persistency and regularity of the beds, as I have 
great numbers of sections figured in my note-book, but no 
good purpose would be gained thereby, as everyone in the 
