Many of the craggy rocks of Charnwood Forest are of volcanic origin and are very old, dating back through 600 million years to Precambrian times. It was the site of the first-ever recorded discovery of Charnia masoni, the earliest-known large, complex fossilised species on record. It was discovered in 1957 by a local schoolboy named Roger Mason (thus masoni) who, with friends, was exploring a quarry near the Charnwood village of Woodhouse Eaves. The rocks of Charnwood Forest remain the only place in Western Europe where these Precambrian fossils have been found.