<P> A cinder cone or scoria cone is a steep conical hill of loose pyroclastic fragments , such as either volcanic clinkers , cinders , volcanic ash , or scoria that has been built around a volcanic vent . They consist of loose pyroclastic debris formed by explosive eruptions or lava fountains from a single , typically cylindrical , vent . As the gas - charged lava is blown violently into the air , it breaks into small fragments that solidify and fall as either cinders , clinkers , or scoria around the vent to form a cone that often is symmetrical ; with slopes between 30 -- 40 ° ; and a nearly circular ground plan . Most cinder cones have a bowl - shaped crater at the summit . </P>
<P> A cinder cone or scoria cone is a steep conical hill of loose pyroclastic fragments , such as either volcanic clinkers , cinders , volcanic ash , or scoria that has been built around a volcanic vent . They consist of loose pyroclastic debris formed by explosive eruptions or lava fountains from a single , typically cylindrical , vent . As the gas - charged lava is blown violently into the air , it breaks into small fragments that solidify and fall as either cinders , clinkers , or scoria around the vent to form a cone that often is symmetrical ; with slopes between 30 -- 40 ° ; and a nearly circular ground plan . Most cinder cones have a bowl - shaped crater at the summit . </P>
what type of eruption does cinder cone volcanoes have
what type of eruption does cinder cone volcanoes have
explosive
explosive