GRD0101S0
110-S20
Greywacke
Mesozoic › Jurassic › Late Jurassic
145.5
-
161.0
1
Ritter 154 › Cabinet 17 › Drawer H
laminated
Original label: Beckwith formation. Dark grey sandstone with occasional flecks of carbon (plant material?). One hand sample is laminated (thin section cut from this sample).
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Wyoming
Highway 30 north, 4 miles southeast of Kemmerer
Latitude: 41.87°
Longitude: -110.52°
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2.5
plane
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2.5
crossed
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scan
crossed
-
scan
plane
GRD0101T0: 50% quartz grains, 2% mica, 2% opaques (carbon material?), 1% feldspar. 45% (mud) matrix. Minor glauconite. (C. Eichler)
N/A
N/A