World Data Service for Geophysics

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


Repository: URI [Contact the Curator]
Ship: Nautilus
Cruise: NA007
Sample: 034-ROVG
Device: grab, ROV
Latitude: 36.601
Longitude: 25.564
Water Depth(m): 298
Date: 20100802
PI: Croff Bell, Katy
Storage: room temperature, dry
Province: trench, continental margin
1 :   
Lithology/Mineralogy: igneous (extrusive/volcanic), pumice/scoria
Weathering/Metamorphism: weathering - light
Glass/remarks:>50% of samples exhibit fresh glass & Mn/Fe oxide coatings
Comments: Sample of outcrop from top of cone 68; 25 cm long white/light grey rhyolite/dacite pumice, biotite-bearing hydrothermally altered black crust and banding internally, large coalesced vesicles have mineral precipitates around edges; non uniform fabric