A volcanic rock or unconsolidated deposit composed of pre-existing fragments, particles or clasts of volcanic origin.
A clastic rock containing volcanic material
Refers to fragments derived from volcanic sources (which may be transported some distance from their place of origin.)
Pertaining to fragmental rocks containing volcanic material in any proportion without regard to origin;
consisting of volcanic fragments or sediments. [AHDOS
Volcaniclastic rocks are those rock types of clastic origin composed solely or primarily of volcanic materials. Commonly associated with explosive volcanic activity - such as plinean or krakatoan eruption styles, or phreatomagmatic eruptions - volcaniclastic deposits are commonly formed from air-bourne ash, lapilli and bombs or blocks ejected from the volcano itself, mixed in with shattered country rock.