火か砕さい丘きゅう

noun

pyroclastic cone

A volcanic landform built from fragments ejected during an eruption; a technical term in geology.

• 火か砕さい丘きゅうは火か山ざん活かつ動どうによって形けい成せいされる地ち形けいの一ひとつだ。

  A pyroclastic cone is one of the landforms created by volcanic activity.