eruptive rock

eruptive rock

[ə′rəp·tiv ′räk]
(petrology)
Rock formed from a volcanic eruption.
Igneous rock that reaches the earth's surface in a molten condition.
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References in periodicals archive ?
This consultation concerns the supply and possibly transport eruptive rocks for the needs of the 5 Departmental Agencies of the layout of the Charente.
These late Carboniferous to early Permian metallic deposits appear to be associated with basaltic to andesitic eruptive rocks.
Knowledge of the earth's mantle is being generated through the study of eruptive rocks that have their sources in the 100 to 200 km depth range.