Also found in: Dictionary.
Related to greenschist facies: Metabasites
greenschist facies[′grēn‚shist ′fā·shēz]
Any schistose rock containing an abundance of green minerals and produced under conditions of low to intermediate temperatures (300-500°C) and low to moderate hydrostatic pressures (3000-8000 bars).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.