Definitions for "Lava dome"
Keywords:  viscous, dome, vent, rhyolite, mound
A steep-sided mass of viscous (doughy) lava extruded from a volcanic vent, often circular in plane view and spiny , rounded, or flat on top. Its surface is often rough and blocky as a result of fragmentation of the cooler, outer crust during growth of the dome.
A steep-sided mass, partly or completely solidified, of viscous lava extruded from a volcanic vent
Bulbous lava flow or viscous plug of lava piled near its vent. Most are made of rhyolite.
A large igneous or lava intrusion whose surface is convex upward.