3i8 
Superficial Gravels and Clays. 
[July, 
houses, as well as the more permanent ones in the gravel- 
and clay-pits. In this way I have been able to trace the 
beds right across from the drainage area of the River Lea 
into and across that of the Brent. 
The general distribution of the deposits is shown in Fig. I, 
which is a section extending from a little east of the “Green 
Man ” public-house, on the St. Alban’s Road, to the top of 
the hill at Hendon. The following are the details from 
which this sedtion has been constructed : — - 
At an old brick-pit at the eastern extremity of my sedtion 
the Upper Boulder-clay has been worked, but the surface is 
now grassed over. Lower down the slope I found a gravel- 
pit open about 250 yards diredtly west of the “ Green Man ” 
public-house, on the south bank of a small stream 
running to the Lea, and obtained the sedtion shown in 
Fig- 3 - 
Ti£. 3. 
Gravel-pit near Eastern End of General Section. 
s. Surface soil. A. Brown boulder-clay, unstratified, with bluish vertical partings. 
Stones mostly flints, with a few pieces of quartzite, sandstone, chalk, &c., the 
chalk mostly decomposed. c. Sands and gravel. Mostly sand at top, with lines 
of small gravel. Sandy coarse gravel below. Pebbles mostly subangular. Base 
not seen. 
In this sedtion the chalk has been mostly dissolved out of 
the clay, but pieces, generally quite soft, are still to be found 
in places, and in others the calcareous matter has entirely 
disappeared, leaving behind, nests of siliceous grains ori- 
ginally contained in the chalk. Ascending the hill westward, 
a good sedtion of the boulder-clay is exposed in Mr. Plow- 
man’s brick-field. The clay here contains much chalk 
detritus and many other travelled stones, including pieces of 
granite, lias, and red chalk. Just beyond this is the cutting 
of the Great Northern Railway. The slopes are now mostly 
grassed over, but the beds were examined and described by 
Mr. Henry Walker when the sedtion was well exposed. He 
found a chalky boulder-clay overlying a blue boulder-clay, 
with occasional patches of sandy gravel between them. 
At Finchley Station, about 550 yards to the north-west of 
