1878.] Superficial Gravels and Clays . 327 
gravel is absent, but the clay, with its accompanying pebble- 
bed, though thin, is continuous. 
Going westward from Ealing, towards the Brent at Han- 
well, the beds down to the 50-feet line have been well 
Fig. 13. 
Section at Beaconsfield Villas. 
Surface soil. a, I. Brown clay, with some pebbles. a , 2 . Pebbly gravel in clay. 
a, 3 . Irregular ferruginous sandy clay and gravel, with whitish stiff clay at base. 
c. Sandy gravel, with? lenticular bands of yellow sand. Upper part of gravel ir- 
regularly stratified. Large flints and stones of quartz and quartzite at base. 
L. London Clay. 
exposed along the Uxbridge Road, in gravel-pits and other 
excavations. On the western side of the Brent the large 
gravel-pits opposite the Lunatic Asylum, and the Southall 
clay- and gravel-pits, afford good sections of the beds. The 
Fig. 14. 
4 
1 
3 
West Side of Brent, near Hanwell Railway Bridge. 
a, 1 . Unstratified brown clay, with a few scattered pebbles. a, 3 . Gravel in clay, 
with many rounded pebbles. c. Yellow sandy subangular gravel, with a few 
large stones (12 inches diameter) at base. h. London Clay. 
gravels descend both slopes of the valley, as shown in Fig. 2 
(page 317). The lower gravel thins out at about the 50-feet 
contour-line, the upper beds overlapping it, and continuing 
nearly to the brook. Both conform to the slopes of the 
valley. 
