GRD01VOS0
M-201
Slate
Precambrian
542.0
-
3850.0
1
Ritter 154 › Cabinet 14 › Drawer F
fine-grained
Purple with reddish/orange veins (Fe-staining?). Earthy luster. Very small amphibole crystals (rare). Original description: argillite.
-
-
California
Death Valley
Latitude: 36.5°
Longitude: -117.1°
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Large and small subrounded to rounded quartz grains
2.5
plane
Large and small subrounded to rounded quartz grains; note the undulose extinction in one half of the top grain.
2.5
crossed
-
scan
crossed
GRD01VOT0: Large and small rounded quartz and quartzite grains in fine-grained matrix. Some of the large quartz have undulose extinction while others do not. Abundant small opaques. Some Fe-staining of the matrix in places. (C. Eichler)
N/A
N/A