GRD029AS0
CIRCE 93-1
Basalt
Cenozoic › Paleogene › Eocene › Early Eocene
48.6
-
55.8
2
Ritter 154 › Cabinet 34 › Drawer B
-
Two very large cut samples (~21x11x7 cm and ~11x8x5 cm) with two smaller pieces. Black, porphyritic basalt with a glassy surface. White feldspar and green olivine crystals visible. Fe-stained bottom. Original label: 21 August, 1968. Basalt. SiO2 ~51.0, TiO2 ~1.10, Na2O ~2.76, K2O ~0.18, P2O5 ~0.10.
-
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
Slide 1: Euhedral to subhedral plagioclase and olivine.
2.5
plane
Slide 1: Euhedral to subhedral plagioclase and olivine. The plagioclase has polysynthetic twinning.
2.5
crossed
Slide 1
scan
crossed
Slide 2 (Scrap)
scan
crossed
GRD029AT0: Slide 1: Large resorbed, subhedral to euhedral plagioclase crystals and glomerocrysts (polysynthetic and simple twinning). Smaller euhedral individual plagioclase crystals, some of which are flow aligned. Occasional small euhedral to subhedral olivine crystals. Groundmass is brown. Bottom of the thin section/sample is altered. (C. Eichler)
GRD029AT1: Slide 2 (Scrap): Fewer plagioclase glomerocrysts and crystals than in slide 1. Less olivine is present as well. (C. Eichler)
N/A
N/A