The main features of a volcano include a vent, a summit crater and a magma chamber. The vent is an opening through which volcanic material is erupted. Volcanoes can have more than one vent. The summit crater is the large concave opening that holds the central vent at the top of the volcano. read more
The characteristics of a shield volcano Shield volcanoes are usually found at constructive [constructive boundaries: Areas between two crustal plates that are moving away from each other, causing new crustal rocks to form. read more
Shield volcanoes are also related in origination to vast lava plateaus and flood basalts present in various parts of the world, generalized eruptive features which occur along linear fissure vents and are distinguished from shield volcanoes proper by the lack of an identifiable primary eruptive center. read more