World Data Service for Geophysics

Index to Marine and Lacustrine Geological Samples (IMLGS)
an international partnership


Repository: SOEST [Contact the Curator]
Ship: Melville
Cruise: BMRG06MV
Sample: BMRG06MV STA91 RD79
Device: dredge, rock
Latitude: -34.56917
Longitude: 78.2365
Water Depth(m): 3065 to 3260
Date: 19960405
PI: Kevin Johnson
Storage: room temperature, dry
Province: rise or ridge, aseismic ocean

Southeast Indian Ridge; Sampling locale: central ridge in axial valley southeast of midpoint of segment G.
1 :   
Weathering/Metamorphism: weathering - fresh
Comments: Sample Type: Ol-plg phyric basalt. Mineralogy: Plg+Ol. Weathering: Fresh. Glass condition: >50% fresh glass. 1 bucket. Probe glass taken with remainder to KJ. DG subsampled the glass.A 15 kg sheet flow sample with multiple glassy chill rinds and plagioclase megacrysts with subordinate olivine. Glass is fresh and hard with slight outer Mn coating, and showing flow striations.