GRD029ES0
CIRCE 93-5
Basalt
Cenozoic › Paleogene › Eocene › Early Eocene
48.6
-
55.8
1
Ritter 154 › Cabinet 34 › Drawer B
Porphyritic
Small (~7.5x8x6 cm from the cut face) sample of vesicular porphyritic basalt; feldspar crystals are visible in the sample. Glassy top with white rind. Billet piece. 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
Glomerocryst of subhedral plagioclase in brown groundmass
2.5
plane
Glomerocryst of subhedral plagioclase in brown groundmass. The small crystals with the high interference colors are olivine.
2.5
crossed
GRD029ET0: Large subhedral crystals and glomerocrysts of plagioclase (Simple and polysynthetic twinning). Some glomerocrysts have pyroxene and olivine crystal in them. The groundmass is brown. (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.