World Data Service for Geophysics

Index to Marine and Lacustrine Geological Samples (IMLGS)
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Repository: SOEST [Contact the Curator]
Ship: Moana Wave
Cruise: MW8518
Sample: MW8518 STA93 RD45
Device: dredge, rock
Latitude: -3.0595
Longitude: 150.458
Water Depth(m): 2670 to 2570
Date: 19860104
Storage: room temperature, dry
Province: basin, small ocean

Manus Basin
1 :   
Comments: ~20 kg of glassy, phyric lavas of vesicular and non-vesicular types. + pumice pieces. 1) Vesicular lavas: elongate vesicles mainly with spherical vesicles too (no irregular ones); very glassy (fresh, most are crumbly); some staining; few of the rocks have a greenish-tint; phenocrysts of plagioclase and clinopyroxene ?/or amphibole? 2) Non vesicular lavas: bulbous glass (not as shiny as group #1); some weathering; phenocrysts of plagioclase, possibly olivine. Pipe dredge has a lot of glass fragments with the sediments.