Translation guide
A volcanic landform built from ejected fragments around a vent.
A cone-shaped hill formed by accumulation of volcanic fragments (scoria, ash, etc.) around a vent.
General term for a pyroclastic cone; literally 'pyroclastic hill'. Used in geology and volcanology.
この火砕丘は約1万年前に形成された。
This pyroclastic cone was formed about 10,000 years ago.
Specifically a scoria cone, the most common type of pyroclastic cone, built from basaltic cinders.
伊豆大島には大きなスコリア丘がある。
There is a large scoria cone on Izu Oshima.
More formal/literary term for pyroclastic cone; 'volcanic clastic hill'. Rarely used in everyday context.
火山砕屑丘は噴火の激しさを示している。
The pyroclastic cone indicates the intensity of the eruption.