Definition of epiclastic in English:

epiclastic

adjective

Geology
  • Formed or consisting of fragments of pre-existing rock produced by processes occurring on the earth's surface, such as erosion or weathering; (also) designating the structure of a rock formed in this way. Contrasted with autoclastic, "cataclastic", "pyroclastic".

Origin

Late 19th century. From epi- + clastic. Compare earlier pyroclastic, and also cataclastic.

Pronunciation

epiclastic

/ˌɛpɪˈklastɪk/