cinder cone
Noun
Meaning
English Wikipedia has an article on:cinder coneWikipedia
cinder cone (plural cinder cones)
(volcanology) A conical deposit of rock fragments around a volcano.
Examples
An explosion from a new cinder cone low on Kliuchevskoi’s southwest flank occurred on October 12. An ash plume rose to altitudes of convert, and drifted eastward.
The initial phase of Surtsey's eruption was highly explosive, as the magma was quite wet, causing the rock to be blown apart by the boiling steam to form a tuff and cinder cone.
Details: Moderately difficult loop traversing scenic pastures along an ancient cinder cone, with some of the best panoramic views Kahuku has to offer.
That began with efforts to save Buck Hill, a small cinder cone on the west side of Trophy Mountain.