This elongate greenstone belt is characterized by Hausel as a synclinorium of metamorphosed volcanic, sedimentary and plutonic rocks that have been regionally metamorphosed to greenschist and amphibolite facies, and locally overprinted by a later retrogressive greenschist facies event.
12.
Lessing, Dean, and Kulander ( 1992 ) mapped the Meadow Branch synclinorium in Berkeley County, West Virginia, and noted that the Rockwell is approximately 200 meters thick here and that a 2-meter thick diamictite is present near the base.
13.
It comprises a fully exposed synclinorium with a varying thickness of Coal Measures ( Upper Carboniferous / Pennsylvanian ) deposits with thick, workable seams in the lower parts and generally thinner and sparser seams in the upper parts, together with a development of sandstones ( Pennant Sandstone ).
