GRD01XXS0
M-304
Greenschist
Unknown
None
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1
Ritter 154 › Cabinet 14 › Drawer C
medium-grained
Small sample of greenschist, composed of amphibole-quartz-chlorite-biotite-calcite/carbonate. Poorly foliated and medium- to coarse-grained.
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Carbonate (hexagonal cleavage) and quartz in green chlorite and opaque oxide matrix; large green crystals are amphibole
2.5
plane
Carbonate (pinkish with hexagonal cleavage) and granular quartz in dark green chlorite and opaque oxide matrix; large yellowish crystals are amphibole
2.5
crossed
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scan
crossed
GRD01XXT0: 65% green amphibole (green-bluegreen-greenbrown) with plenty of euhedral cross-sections, 20% chlorite, 10% quartz, 5% deformed calcium carbonate; Granular quartz (containing some carbonate crystals) and large crystals of amphibole in a fine matrix of green chlorite and opaque oxides. (J. Gee and C. Eichler)
N/A
N/A