The following links to other websites may be of interest.
Cycling & Mountain Biking
iSpot A friendly and free community website helping to identify wildlife and share nature.
For further reading:
William Dreghorn “Geology Explained in the Severn Vale and Cotswolds” 1967 (Reprinted 1973) ISBN 0 7153 4102 2
L Richardson “Geology of Cheltenham” 1904