volcaniclastic rock
Technical term in geology for rock formed from volcanic fragments. Used in academic and scientific contexts.
Volcaniclastic rocks are widely distributed in this region.
火山岩 (volcanic rock) is a broader category that includes lava flows, while 火山砕屑岩 specifically refers to rocks made of fragmented volcanic material.
Compound of 火山 (volcano), 砕屑 (clastic, fragment), and 岩 (rock). A modern scientific term.