Hand Sample: Aphanitic dark gray vesicular basalt with olivine crystals scattered throughout. The olivine crystals are most common in this sample than in other samples within the suite. Sample was collected from an olivine-rich zone within Mauna Loa flow.
Thin Section: Groundmass composed of mainly of glass, plagioclase, microcrystals of clinopyroxene. Thin section also contains phenocrysts of olivine and pyroxene.
Sample collected January, 1969
Number of Thin Sections