GRD029GS0
CIRCE 93-7
Basalt
Cenozoic › Paleogene › Eocene › Early Eocene
48.6
-
55.8
1
Ritter 154 › Cabinet 34 › Drawer B
Porphyritic
Large (~7x6x6.5 cm from the cut face) sample of vesicular porphyritic basalt; feldspar and pyroxene crystals are visible in the sample. Glassy top surface with some Fe-staining. White rind on the sides. Billet and billet pieces. Thin section missing. Original label: 21 August, 1968.
-
CIRCE
Indian Ocean
Original: 12 25.5, 65 55.0 E. Depth: -3540 to -3880 to -3730.
Latitude: 12.425°
Longitude: 65.916667°
-3716.0 m a.s.l.
N/A
Skeletal pyroxene with resorbed plagioclase
2.5
plane
Skeletal pyroxene with resorbed plagioclase
2.5
crossed
-
scan
crossed
GRD029GT0: Occasional large, partially resorbed plagioclase crystals and glomerocrysts (many display simple twinning). All of the small pyroxenes are resorbed to the point of being skeletal. Abundant small, thin plagioclase crystals in brown groundmass. (C. Eichler)
N/A
Fisher_GSABulletin_1971
Fisher, R.L., Sclater, J.G., McKenzie, D.P., 1971, Evolution of the Central Indian Ridge, Western Indian Ocean: Geological Society of America Bulletin, v. 82, no. 3, p. 553-562.