A description is a natural opening of Earth's surface that looks like a mountain with it's top cut off. Another is a natural opening of Earth's surface that contains magma (not lava).
Cinder cone volcanoes are the most common kind of volcanoes.They are steep sided cones of basaltic fragments and are smaller and simpler than composite volcanoes. Streaming gases carry liquid lava...
Cinder cones are the simplest type of volcano. They are built from particles and blobs of congealed lava ejected from a single vent. As the gas-charged lava is blown violently into the air, it breaks...
a cinder cone is a volcano that spews mainly pyroclastic material. it is steep-sided and erodes easily. they are small and do not stay active for long.