An incohesive, clay-rich fine- to ultrafine-grained cataclasite, which may
possess a schistosity and containing <30% visible fragments. Lithic clasts may be present.
Ultrafine-grained vitreous-looking material, usually black and flinty in
appearance, occuring as thin planar veins, injection veins or as a matrix to pseudo-
conglomerates or breccias, which infills dilation fractures in the host rock.
Agricola (Bauer, G.), 1556. De re metallica, Libri XII, posthumous edition illustrated by H.R. Manuel.
, 538pp. (1
edn in 1530)
Barker, A.J., 1990. Introduction to Metamorphic Textures and Microstructures. Blackie. 162pp.
Barth T.F.W., 1978. In, McGraw-Hill Encyclopedia of the Geological Sciences, (ed., Lapedes, D.N.). McGraw-
Bates R.L. and Jackson J.A 1987. Glossary of Geology (3
edition). American Geological Institute, Virginia,
Boullier, A.M. & Nicolas, A. 1975.
Classification of textures and fabrics from peridotite xenoliths from South
African Kimberlites. Physics and Chemistry of the Earth, (eds. Ahrens, L.H., Dawson, J.B. Duncan,
A.R. & Erlank, A.J.),
467-475. Pergamon Press.