intersertal


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intersertal

[¦in·tər¦sərd·əl]
(petrology)
Referring to the texture of a porphyritic igneous rock in which the groundmass forms a small proportion of the rock, filling the interstices between unoriented feldspar laths.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The trachyandesite of Unit D is distinctive in that the groundmass plagioclase laths are oligoclase, simply carlsbad twinned and bluntly terminated, rather than tapered; and the groundmass is mostly intersertal, with pale brown to clear glass which is sometimes altered to brown smectite.
The basaltic rocks are generally fine-grained and porphyritic, with sub-ophitic to ophitic clinopyroxene, while the intersertal glass is charged with ore due possibly to devitrification.
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