Blue Lias dated back to the early Jurassic period, and is 195-205 million years old. It is made from layers of compressed shale and limestone and is renowned for its ammonite fossils. The beautifulblue-grey colour occurs as a result of its high iron contect, enclosed for the most part in pyrite crystals. It also features some brown banding which weathers to a pale yellow/grey.
Blue Lias has been used extensivley throughout the South West up as far as Warwickshire. Its strength and durability make it an excellent building material.