Metaconglomerate
Conglomerate: coarse grained (rudaceous) rock with rounded clasts that are greater than 2 mm in size. Conglomerates may be termed ‘intraformational’ if formed of local, recently deposited clasts, or ‘extraformational’ if the clasts are derived from outside the area of deposition. The term ‘polygenetic’ is used to describe a conglomerate rock that has been produced under a variety of conditions or processes. Meta-: from the Greek meta meaning ‘with’ or ‘after’, a prefix implying change and meaning ‘behind’, ‘after’, or ‘beyond’. The prefix may be attached to the name of any rock which has undergone metamorphism. For instance, a basalt which has been metamorphosed may be termed a metabasalt, and a pelitic rock which has suffered metamorphism may be termed a metapelite. — A Dictionary of Geology and Earth Sciences (4 ed.), Oxford University Press
