a carrot shaped volcanic vent that forms when hot magma comes in contact with cold groundwater
a complex and chaotic pipe of a special type of very low viscosity magma (such as kimberlite) filled with rock fragments
a massive volcanic eruption that travels at high speeds to very high altitudes in one massive explosion
an explosive vent of a volcanic eruption
A small explosive volcanic intrusion comprised of varying amounts and types of pyroclastic debris and surrounding country rock.
A diatreme is a volcanic vent or pipe that is formed by gas-charged magma.
a volcanic vent blasted through solid rock by exploding gases. [AHDOS
A diatreme is a breccia filled volcanic pipe that was formed by a gaseous explosion. Diatremes often breach the surface and produce a tuff cone or a filled relatively shallow crater known as a maar or other volcanic pipes. The term has been applied more generally to any concave body of broken rock or tuff-breccia, generally formed by explosive or hydrostatic forces, whether or not it is related to volcanism.