Torbanite

Torbanite, also known as boghead coal, is a variety of fine-grained black oil shale. It usually occurs as lenticular masses, often associated with deposits of Permian coals. Torbanite is classified as lacustrine type oil shale.

Torbanite is named after Torbane Hill near Bathgate in Scotland, its main location of occurrence. Other major deposits of torbanite are found in Pennsylvania and Illinois, USA, in Mpumalanga in South Africa, in the Sydney Basin of New South Wales, Australia, the largest deposit of which is located at Glen Davis, and in Nova Scotia, Canada.