Oceanite

Oceanite

HA-8

Hand Sample: Aphanitic dark gray vesicular oceanite with phaneritic olivine crystals. Olivine crystals are scattered throughout the sample and are either growing in clusters or as a single crystal. Olivine crystals range in diameter from 0.1cm to 0.8cm. Vesicles are very predominant, and range from 0.01 cm to 1 cm in diameter

Thin Section: Aphanitic groundmass of plagioclase, interstitial glass, and microcrystals of clinopyroxene. Phenocrysts of olivine, pyroxene, amphiboles, and plagioclase are present. Vesicles are roughly ~.01mm in diameter and present throughout the sample.

Sample collected January, 1969

Western Minerals

Nanawale Bay - Island of Hawaii

1840

1