noun
volcanic cone
Geological term for a cone-shaped hill or mountain formed by volcanic material around a vent.
富士山は典型的な火山円錐丘の一つです。
Mount Fuji is one of the typical volcanic cones.
火山 is the general term for 'volcano', while 火山円錐丘 specifically refers to the cone-shaped landform built by eruptions.
Compound of 火山 (volcano) + 円錐 (cone) + 丘 (hill), literally 'volcano cone hill'. The term is a direct description of the landform.