GRD0026S0
I-81
Gabbronorite
Unknown
None
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2
Ritter 154 › Cabinet 3 › Drawer F
gabbronorite
Magnetic Gabbronorite containing Plag, Biotite, Cpx, Hbl, Opx, Chlorite, Magnetite. Original label: Peekskill Norite. Cortland Series.
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New York
Peekskill, S of RR station, West Point quad.
Latitude: 41.3°
Longitude: -73.9°
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Pyroxene and biotite.
2.5
plane
Deformed sanidine
2.5
crossed
-
scan
crossed
-
scan
plane
GRD0026T0: 45% Plagioclase (Andesite/Labradorite), 11% Opaques(Magnetite), 8% Biotite, 15% Cpx, 15% Hbl, 5% Opx, minor Chlorite. Section may be a bit thick (some Plag/Opx show F.O. yellow). Hbl tinted red in PPL suggest potential alteration. Opaques form as stringers in biotite parallel to cleavage. Original Description: 50% sanidine (deformed twins, slightly altered), 25% orthopyroxene, 15% clinopyroxene (B+), 5% biotite, 3% opaques (S. Curran /Original: J. Gee and C. Eichler)
GRD0026T1: 45% Plagioclase (Andesite/Labradorite), 11% Opaques(Magnetite), 8% Biotite, 15% Cpx, 15% Hbl, 5% Opx, minor Chlorite. Section may be a bit thick (some Plag/Opx show F.O. yellow). Hbl tinted red in PPL suggest potential alteration. Opaques form as stringers in biotite parallel to cleavage. Original Description: 50% sanidine (deformed twins, slightly altered), 25% orthopyroxene, 15% clinopyroxene (B+), 5% biotite, 3% opaques
N/A
N/A