An Andesite quarry.
Information on the geology can be found in
Bosworth, T O, 1911 The Keuper Marls around CXharnwoon. Pub. Leicester Lit. and Phil. Soc.
King, R J, 1967 The Minerals of Leicestershire. Transactions of the Leicester Lit. and Phil. Soc.
Moseley, J and Ford, 1985. A stratigraphic revision of the late Precambrian rocks of Charnwood Forest. Mercian Geologist, 10, 1-18.
Worssam, BC and Old, RA, 1988, The Geology of the country around Coalville, British Geological Survey Memoir for sheet 155, HMSO.
History of the quarry can be found here ... http://www.aggregate.com/pdf/bardon%20hill%20quarries.pdf