Alkalic Olivine Basalt
Hand Sample: Aphanitic light gray vesicular basalt with large olivine crystals. Olivine phenocrysts range in size from single crystals approx. 0.1cm in diameter to clusters of olivine as large as 1cm in diameter. Vesicles throughout the sample are primarily large and also elongate in shape.
Thin Section: Groundmass composed of small sized plagioclase grains, glass, and clinopyroxene. Some small phenocrysts of olivine present throughout the thin section.
Sample collected in January, 1969.
Is Part Of
Volcanic Phenomena Suite - The Hawaiian Islands of Hawaii and Oahu
Hualaiai - Island of Hawaii
Number of Thin Sections