sub-facies

Science Dictionary
facies   (fā'shē-ēz', -shēz)  Pronunciation Key 
Plural facies
    1. A body of sedimentary rock distinguished from others by its lithology, geometry, sedimentary structures, proximity to other types of sedimentary rock, and fossil content, and recognized as characteristic of a particular depositional environment.

    2. For a metamorphic rock, the particular combination of pressure and temperature under which metamorphism occurred.

  1. The general aspect or makeup of an ecological community, especially a local modification of a community characterized by a conspicuous or abundant species that is absent or less concentrated in other locations.

  2. The appearance or expression of the face, especially when typical of a certain disorder or disease.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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