砕さい屑せつ丘きゅう

noun

pyroclastic cone

Technical term in volcanology for a cone-shaped landform built from fragmented volcanic material ejected during eruptions.

• 富ふ士じ山さんの周しゅう辺へんには多おおくの砕さい屑せつ丘きゅうが見みられる。

  Many pyroclastic cones can be seen around Mt. Fuji.