feldspathic shale

feldspathic shale

[fel′spath·ik ′shāl]

(petrology)

A well-laminated shale with more than 10% feldspar in the silt size and with a finer matrix of kaolinitic clay minerals.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.