welded tuff
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Related to welded tuff: Volcanic Tuff, Volcanic breccia
welded tuff
[′wel·dəd ′təf] (petrology)
A pyroclastic deposit hardened by the action of heat, pressure from overlying material, and hot gases. Also known as tuff lava.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.