symmictite

symmictite

[sə′mik‚tīt]
(petrology)
An eruptive breccia that is homogenized and is made up of a mixture of country rock and intrusive rock.
References in periodicals archive ?
The work of Crowell (1957), Dott (1961) and Winterer (1963) led to the introduction of purely descriptive terms for poorly sorted and laminated facies that avoided any preconceived notion of a glacial origin (e.g., diamict, mixtite, symmictite, tilloid, rhythmite; see Schermerhorn, 1966).