A lake of molten lava, usually basaltic, contained in a vent, crater, or broad depression of a shield volcano.

A large pool of lava produced around a vent when lava fountains spew forth large amounts of lava in a short period of time.

A lake of molten lava, usually basaltic, in a volcanic crater or depression. The term refers to solidified and partially solidified stages as well as to the molten, active lava lake.

A lava lake is a lake of basaltic lava contained in a volcanic caldera.

Lava lakes are large volumes of molten lava, usually basaltic, contained in a vent, volcanic crater, or broad depression. Scientists use the term to describe both lava lakes that are molten and those that are partly or completely solidified. Lava lakes can form (1) from one or more vents in a crater that erupts enough lava to partially fill the crater; (2) when lava pours into a crater or broad depression and partially fills the crater; and (3) atop a new vent that erupts lava continuously for a period of several weeks or more and slowly builds a crater higher and higher above the surrounding ground.