Cinder cones are chiefly formed by Strombolian eruptions.
The volcano forms when ash, cinders and bombs pile up around the vent to form a circular or oval cone.
some times in Hawaii or in an ocean
Cinder cones form around a volcanic vent. Lava explodes into the air and cools very quickly forming accumulating a ring of volcanic fragments (like scoria or tuff) around the vent. They are not very...
cinder cone volcanoes usually form around lithospheric plate boundaries.