側そっ火か山ざん

noun

parasitic volcano; lateral volcano

A smaller volcanic vent or cone on the flank of a larger volcano, formed by eruptions branching off from the main conduit. Used in geology and volcanology.

• 富ふ士じ山さんには多おおくの側そっ火か山ざんが存そん在ざいする。

  Mount Fuji has many parasitic volcanoes.

• 側そっ火か山ざんの活かつ動どうは本ほん火か山ざんの噴ふん火かと関かん連れんしていることが多おおい。

  Activity of parasitic volcanoes is often related to eruptions of the main volcano.