GRD026NS0
ERDC-29D-5(2)
Syenite
Unknown
None
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2
Ritter 154 › Cabinet 37 › Drawer F
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Small cut sample which measures ~3x3x2 cm from the cut face. Coarse-grained crystalline. Abundant grey feldspar and greenish pyroxene. Billet and billet pieces.
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ERDC Dredge 29
Pacific Ocean
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N/A
Slide 1: Glomerocryst of biotite and pyroxene surrounded by plagioclase
2.5
plane
Slide 1: Glomerocryst of biotite and pyroxene surrounded by plagioclase
2.5
crossed
Glomerocryst of biotite, pyroxene, and opaque oxides surrounded by plagioclase
2.5
plane
Glomerocryst of biotite, pyroxene, and opaque oxides surrounded by plagioclase
2.5
crossed
Slide 1
scan
crossed
Slide 2
scan
crossed
GRD026NT0: Slide 1: 90% plagioclase (polysynthetic twinning) and potassium feldspar (tartan twinning), both feldspars have beautiful concentric oscillatory zonation, 5% pyroxene, 3% biotite, 2% subhedral opaques, some serpentine replacement (C. Eichler)
GRD026NT1: 90% plagioclase (polysynthetic twinning) and potassium feldspar (tartan twinning), both feldspars have beautiful concentric oscillatory zonation, 5% pyroxene, 3% biotite, 2% subhedral opaques, some serpentine replacement (C. Eichler)
N/A
N/A