Definition of volcaniclastic in US English:



  • Relating to or denoting a clastic rock which contains volcanic material.

    ‘volcaniclastic sediments’
    • ‘The sediments are partly clastic and partly volcaniclastic because volcanism is active along such margins.’
    • ‘Ladinian strata of the Balaton Highland (west-central Hungary) comprise interbedded marine carbonate and volcaniclastic rocks.’
    • ‘Well-rounded clasts include lava, volcaniclastic sandstones and bioclastic limestones with nummulites, bryozoa, microbial carbonate and bivalve material.’
    • ‘Late Devonian to Carboniferous rocks consist of interbedded mudrocks, sandstones and volcaniclastic strata, whereas the Permian rocks are crystalline limestone with subordinate clastic and volcaniclastic sediments.’
    • ‘Tuff dykes of unusual size invade coarser-grained volcaniclastic rocks of the Jurassic Mawson Formation at Coombs Hills and Allan Hills, Antarctica.’