Robinswood Hill Rural Geology Trail isbn 9781904530028 Robinswood Hill is an outlier of the Cotswolds, now a country park, owned and managed by Gloucester City Council. The main quarry on the hill provides the best inland section of Early Jurassic clay and siltstones and was once used to supply raw material for Gloucester brickworks. The many springs that emanate from the hill supplied the first running water to the city of Gloucester.