Vol. 51.] GREENSAND OF EAST SURREY. 117 



Rabbitsheath Cottages, a section facing south at tbe top of the 

 escarpment shows the same beds capped by white sandstone with 

 traces of chert ; while, in the lane adjoining, the massive chert-beds 

 are seen in situ. There is a small fault here with downthrow to 

 the north, the exact junction being concealed by slope and under- 

 wood, but if the lines of the thick chert are carried on a few yards, 

 at the dip which they show where exposed, they run into the 

 sands. 



This locality is close to Tilburstow Hill, where there are now six 

 sections, three of these being in the plantation, approximately on 

 one horizon, descending the slope to the south of the high road, 

 and almost opposite the lane by Rabbitsheath Cottages. There 

 are also two pits on Tilburstow Hill Common, and another in the 

 plantation south of, and below, the escarpment to the west of the 

 Roman Road. 



The following section is shown in the upper pit of Tilburstow 

 Hill Plantation ; the lower pits show portions of the same series. 

 Dip N. :— 



Sandy Fuller's Earth 4 feet. 



Calcareous clayey greensand (about equal proportions 



of glauconitic sand and clayey partings) 4 feet. 



Sandy Fuller's Earth 8 inches to 1 foot. 



Calcareous clayey greensand, as above described, but 



harder and with more sand — an impure, glauconitic, 



calcareous sandstone, capped occasionally by a 4-inch 



bed of hard, glauconitic, sandy limestone 5 feet 3 inches. 



Beds of dark-blue or black calcareo-siliceous rock, 



interbedded in lenticular masses with glauconitic 



calcareous sandstone ; the blue rock is often fringed 



with buff sandy limestone 7 feet. 



Compact cream-coloured limestone 1 foot. 



Repetition of blue rock and associated beds, as described 



above 3 feet seen. 



The Fuller's Earth at the top of this section appears to lie in 

 basin-shaped hollows in brown sandy clay, the whole lying on the 

 next bed tabled. There is much clayey drift and soil above, so that 

 the upper part of the section is rather obscure, but the thickness 

 (4 feet) here named for the Fuller's Earth can be clearly seen. 

 This section lies at about the 500-foot contour; almost due east of 

 it, on the northern slope of Tilburstow Hill Common, at a level 

 perhaps 50 feet lower, there is a small pit which shows 



Drift, etc 3 feet. 



Rubble-sandstone, slightly cherty in places 5.| feet. 



Sandy chert-beds of the usual character 5£ feet. 



On the eastern side of the road-cutting south through the escarp- 

 ment, still on the common, there is a large pit, which shows a section 

 of about 70 feet, dip N. The section lies some 300 yards south of 

 the parallel of the Plantation Pit, and is between 520 and 590 O.D. 

 At the top there are sandy cherts, thin sandstones, beds of massive 

 chert, and bands of ironstone, but the chief part of the section 



