How Much Is Blue Lias Stone?

Blue Lias is a sequence of layers of limestones and shale dating from the Jurassic period (some 195 million years ago). It is a prevalent feature of the cliffs around Lyme Regis and Charmouth, Dorset, as well as Somerset, particularly around Glastonbury and the Polden Hills.

Is Blue Lias limestone?

The Blue Lias consists of a sequence of limestone and shale layers, laid down in latest Triassic and early Jurassic times, between 195 and 200 million years ago. The Blue Lias is famous for its fossils, especially ammonites.

What type of stone is Hamstone?

Hamstone is a Jurassic Shelley limestone comprised of crushed up fragments of shells and other sea creatures, all cemented together by calcium carbonate. The fossils found in the rock include ammonites, from which we know the stone to be 170 million years old.