phyllomorphic stage

phyllomorphic stage

[¦fil·ə¦mȯr·fik ‚stāj]
(geology)
The most advanced geochemical stage of diagenesis, characterized by authigenic development of micas, feldspars, and chlorites at the expense of clays.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
These diagenetic modifications represent the final phase (phyllomorphic stage) of diagenesis probably resulting from deep burial, increased geothermal gradient and pressure.