Started the day with mapping seamount North of Niutao Island (Tefolaha), resulting in a dredge up to the top of this ridge-shaped seamount. We got a large amount of basalt samples, and some volcaniclastics (one with cm-sized clinopyroxene phenocrysts). We spent most of the afternoon mapping the Western side of Niutao Island, and then dredged its deeper Western flank. This dredge came up with a decent number of nice basalt cobbles, and some pieces of separate Mn crust (biggest nearly 1 foot across). The basalt appears to be mostly fragments of pillow lavas with chilled margins (though no obvious glass in this dredge). Overall our dredges have had variable Mn crusts ranging from a dusting to multiple inches thick.
- Jasper Konter
Created by Anthony Koppers on Saturday, 3 August 2013 and updated on Saturday, 10 August 2013
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