Polymict

Origin

.

Full definition of polymict

Adjective

1. (geology, of a breccia) Containing multiple types of rock.
• 1952, Walter Wahl, The brecciated stony meteorites and meteorites containing foreign fragments, It is pointed out that the breccias among stony meteorites are mainly of two kinds : (a) breccias in which the enclosed fragments are of the same material as the surrounding principal mass of the stone: it is proposed to call this kind of breccias “monomict breccias,” and (b) breccias in which the enclosed fragments are of a foreign material as compared with the surrounding principal mass of the stone: it is proposed to call these breccias “polymict breccias.”
• 1983, Jeremy S. Delaney et al., The Nomenclature of Polymict Basaltic Achondrites, The ‘monomict’ meteorites are samples of a single lithology while the polymict meteorites are those containing two or more lithologies.