GRD00LGS0
110-CB 21
Conglomerate
Mesozoic › Triassic › Late Triassic
201.6
-
235.0
1
Ritter 154 › Cabinet 17 › Drawer C
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Original label: Sugarloaf arkose. Sugarloaf in Newark Group. Coll. No. 276.
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-
Massachusetts
Mt Tom Station, Northampton
Latitude: 42.304°
Longitude: -72.622°
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Quartz with undulose extinction and potassium feldspar with tartan twinning.
2.5
crossed
Quartz and feldspar
2.5
plane
-
scan
crossed
GRD00LGT0: Large granular quartz, potassium feldspar (tartan twinning), occasional mica. Smaller quartz in matrix (C. Eichler)
N/A
N/A