Xfh
FELSIC AND HORNBLENDIC GNEISSES, EITHER SEPARATE OR INTERLAYERED
metamorphic
felsic gneiss, mafic gneiss
metabasalt, metagraywacke
5.7.1
felsic gneiss
mafic gneiss
Early Proterozoic
1800
1700
Includes metabasalt, metatuff, and interbedded metagraywacke; locally contains interlayered biotite gneiss.  Derived principally from volcanic rocks
ABW
X
gneiss