World Data Service for Geophysics

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

doi:10.7289/V5H41PB8


Repository: SOEST [Contact the Curator]
Ship: Moana Wave
Cruise: MW8518
Sample: MW8518 STA61 RD24
Device: dredge, rock
Latitude: -3.555
Longitude: 149.84233
Water Depth(m): 2185 to 2155
Date: 19851229
Storage: room temperature, dry
Province: basin, small ocean

Manus Basin
1 :   
Comments: ~50 kg of glassy lavas; sparsely porphyritic (microphenocrysts!); 3 basic lava types. Not very much mud: small amounts of brown and army green types. Group 1: fine-grained, (sparsely) porphyritic pillow lavas (nice bulbous textures) - olivine, plagioclase phyric; few zones of vesicles <0.05 cm diameter. Group 2: vesicular, glassy lavas - no apparent phenocrysts but maybe plagioclase; vesicles ~0.2 cm average diameter; nice shiny, black glass. Group 3: Sheet flow lavas - intermediate vesicularity between groups 1 and 2; tend to be more elongate than group 2 and more variable sizes; glassy, striated surfaces; flow structures. 4 pails.
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