greenschist


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greenschist

[′grēn‚shist]
(petrology)
A schistose metamorphic rock with abundant chlorite, epidote, or actinolite present, giving it a green color.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The bedrock is of Cambro-Silurian origin (amphibolite, greenschist, and calcareous phyllite) and the Quaternary deposits consist of peat, till, glacifluvial, and loessic accumulations.
Lithologies metamorphosed to the greenschist facies have a contact at mile marker 16.5 along US Highway #64 in the Ocoee Gorge.
Whereas [D.sub.1] and [D.sub.2] developed under amphibolite and greenschist facies metamorphic conditions, [D.sub.3] represents an event leading to the development of kink bands, localized shear zones, and slickensides along the thrust sheet of the Qatruyeh area [47].
Host structures are mainly shear zones and brittle faults developed within the metabasalt unit of the Marraba Volcanics which has been metamorphosed to greenschist and amphibolite.
The Kagi Metamorphics are composed of leucocratic felsic chlorite-muscovite -quartz-feldspar schist (low grade greenschist facies), some garnet-mica schist and minor metabasite (Department of Mineral Resources, unpublished).
floridana haematoreia: range 671-975 m; Table 1) in the Greenschist and Amphibolite Metamorphic Facies Zones of the Blue Ridge Belt (North Carolina Geologic Survey, 1985).
Schist: composed of biotite and quartz, and chlorite and quartz (greenschist); schistocity is well defined, and sometimes folding is seen.
The hydrothermal alteration of the samples varies from literally fresh rocks to true greenschist facies rocks.

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