0
3.05
Q
COLLUVIUM
Colluvium and highly decomposed granitic gneiss
Strat Unit Name
Quaternary rocks
Strat Unit Description
Undifferentiated Quaternary rocks.
GIS Code
IH
3.05
26.64
YMb
GNEISS
Med.-coarse gr., qtz-fspar-occ. biotite and garnet rock, weathered in upper part
Strat Unit Name
Birksgate Complex
Strat Unit Description
Gneiss, quartzofeldspathic; orthogneiss, felsic to ultramafic; paragneiss, pelitic to calcic: iron formation. Granulite to amphibolite facies. Protolith ages ~1680–1550 Ma.
GIS Code
YMb
26.64
178.86
Mrg
SERPENTINITE
PYROXENITE
Serpentinite with some carbonate and magnetite, med.-coarse gr. olivine pyroxenite
Strat Unit Name
Giles Complex
Strat Unit Description
Layered mafic-ultramafic intrusions: gabbro, norite, peridotite, pyroxenite, anorthosite and troctolite. ~1085–1040 Ma.
GIS Code
M-rg
178.86
190.8
YMb
GNEISS
FELSIC PEGMATITE
Qtz-biot-fspar-amphibole-garnet gneiss, coarse gr. qtz-fspar-biot pegmatite
Strat Unit Name
Birksgate Complex
Strat Unit Description
Gneiss, quartzofeldspathic; orthogneiss, felsic to ultramafic; paragneiss, pelitic to calcic: iron formation. Granulite to amphibolite facies. Protolith ages ~1680–1550 Ma.
GIS Code
YMb
190.8
195.68
Mrg
PYROXENITE
PERIDOTITE
Granular pyroxenite, banded peridotite
Strat Unit Name
Giles Complex
Strat Unit Description
Layered mafic-ultramafic intrusions: gabbro, norite, peridotite, pyroxenite, anorthosite and troctolite. ~1085–1040 Ma.
GIS Code
M-rg
195.68
207.33
YMb
GNEISS
Qtz-fspar-biot-garnet gneiss with siliceous and feldspathic bands
Strat Unit Name
Birksgate Complex
Strat Unit Description
Gneiss, quartzofeldspathic; orthogneiss, felsic to ultramafic; paragneiss, pelitic to calcic: iron formation. Granulite to amphibolite facies. Protolith ages ~1680–1550 Ma.
GIS Code
YMb