Hornsleasow Quarry (grid reference SP131322) is a 3.5-hectare (8.6-acre) geological Site of Special Scientific Interest in Gloucestershire, notified in 1974.

[3] The quarry (Snowshill Hill) lies in the Cotswold Area of Outstanding Natural Beauty and exposes a relatively thick sequence of Bathonian (Middle Jurassic) oolitic limestones, and thin clays of significant importance in correlating similar sequences in north Gloucestershire.

The conditions then would have been similar to those in the present day Bahama Banks in the Caribbean.

[1] Evidence for the dating is provided by the sedimentary structures and the type of fossils found within the rocks which are well preserved.

This article about a Site of Special Scientific Interest in England is a stub.