acidic lava

acidic lava

[ə′sid·ik ′lä·və]
(geology)
Extruded felsic igneous magma which is rich in silica (SiO2 content exceeds 65).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Which light volcanic rock derived from acidic lava is used as an abrasive?
Extensive basic and acidic lavas cap the Karoo Supergroup and their extrusion preceded the fragmentation of Gondwanaland, which began around 200 million years ago and lasted until the proto-Atlantic was formed about 120 million years ago.