South. North. 
LOWER 6HALK—BERKSHIRE. 
169 
Horizontal Scale, one inch to a mile. Vertical Scale, 1,200 feet to an inch. 
Upper Chalk. 2. Upper Greensand (Sand and Malmstone). 
Middle Chalk. 1. Gault (Lower and Upper). _ 
Lower Chalk. N.B.—The patch under Chilton is gravel. 
