53 
formation after another is overlaid to the Eastward, some become 
very much thinner and others entirely disappear, as will be seen 
from the following examples :— 
Section of Well Shaft and Boring at Kentish Town. 
Feet. 
‘ London Clay... ve ae ooo 
T z 
ak Sands and Mottled Clay . coe Mls 
Chalk and Chalk Marl ... .. 645 
Secondary stata Upper Greensand of el i: 
Gault ... Loe “o .. 130 
Paleozoic Strata, Red and Grey Sandstones soe lists: 
Total 355 wee ... 1,801$ 
Section of Well Boring at Harwich. 
Feet. 
Earth and Gravel A: wide 25 
Tertiary Suatn| London Clay _... sranads 
Sands, Shingle and Mottled Clay ... 28% 
Chalk ae fe ... 888 
Secondary stata Upper Greensand ae oe 
Gault... one 3 Peo FH, 
Paleozoic Strata, Dark Slaty Rock ee . 443 
Total =e =e ... 1,070 
Or to take the more recent boring at Meua’s Brewery, Tottenham 
Court Road, London, the Strata passed through were as 
follows :— 
Feet, 
Flint Gravel 
m London Clay : 
meeery -Bizala Woolwich and Reading Beds r yeGs 
Thanet Sands J 
Chalk and Chalk Marl ... we 655 
Upper Greensand ose) eS 
ens ee Gault eee eee ... 160 
Lower Greensand den ie OF 
Upper Devonian Ae se ove tae 80 
Total ae ... 1,144 
