tumuli lava

tumuli lava

[′tü·myə‚lī ′lä·və]
(geology)
A type of lava flow forming ovoid mounds, a few feet high and a few tens of feet long, caused by buckling up of the crust.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.