SECTIONAL OFFICERS REPORTS. 
GEOLOGICAL:—H. PRESTON, F.G.S. 
CHALKY BOULDER-CLAY AT SAPPERTON. 
During the early part of 1909, a well was sunk through 
23 feet of chalky-boulder-clay at Sapperton, which was found to 
be resting on Great Oolite Limestone. 
The top surface of the Limestone is very much grooved 
and striated, which may have been caused by the creep of the 
frozen clay during the Glacial period. The clay is full of chalk 
pebbles, all of which are more or less scratched and striated, some 
of the larger ones, up to 2 or 3 inches in size, being very well 
marked. 
The clay is light-grey in colour, and is very limy in 
character ; this limy condition of the clay may have been partly 
caused by the chalk fragments having been ground into pebbles 
whilst being embedded in the moving clay. 
There were only a few flints seen, but of these some were 
slabs from 7 or 8 inches square and 6 inches thick. 
A few blocks of concretionary ironstone were also present, 
5 or 6 inches thick. These were probably obtained from the base 
of the Great Oolite Limestone. 
Since the well was sunk a boring has been made into the 
Lincolnshire Limestone beneath, and a supply of water obtained. 
A similar section of chalky-boulder-clay has been recently 
exposed (Jan., 1912) at Great Ponton. A hole was dug on the 
East side of the High Dyke about half way between Great Ponton 
and Wood Nook, to carry away water draining from a field, a 
large number of chalk pebbles were thrown out, together with 
slabs of flint and other varieties of rock. 
