178 
TILVESTER HILL. 
from the section being an excellent example of the 
beds of chert, &c,, a sketch of the hill is given in 
the plate of sections, which the following descrip- 
tion will explain. From Fellbridge waters, a few 
miles to the north of East Grinstead, the Weald clay 
prevails, and its peculiar limestone, with jmludincE, 
is dug up in a farm at the foot of Tilvester Hill. 
Ascending the hill, sand resembling that of Red-hill, 
near Reigate, appears, containing veins and large 
concretionary masses of ironstone ; this is suc- 
ceeded by grey sand and layers of chert, alternat- 
ing with marl, and sand of various colours. From 
their first emergence, to near the summit of the hill, 
the strata are highly inclined, dipping at an angle of 
about 40° to the north : they then reappear, with but 
a slight degree of inclination, the red sand forming 
a bank on the side of the road, nearly 30 feet high. 
On the northern slope of the hill, the chert is seen 
immediately beneath the turf, and is quarried for 
the roads. Godstone is situated on the sand, 
but the windmill near it stands on the gait, which 
forms a plain or terrace extending to the foot of the 
neighbouring chalk hills, where the firestone, marl, 
and chalk, ajipear in their usual order of superposi- 
tion. The following is a more particular enumer- 
ation of the strata at Tilvester Hill : — 
1. First and lowermost deposit. Weald clay with 
Sussex marble. 
2. Red and fawn-coloured sand, with ironstone. 
3. Grey sand, with veins of a reddish colour. 
4. Greyish green sand. 
5 . Olive green, and ferruginous sand. 
