Title
Alkalic Olivine Basalt
Identifier
HA-9
Description
Hand Sample: Aphanitic, light-gray alkalic olivine basalt. Sample contains abundant phenocrysts of feldspar, olivine, and augite. Phenocrysts range in diameter from 0.1cm to 0.5cm. Many of the phenocrysts in sample have an iridescent luster. Sample has very few vesicles, which are generally less than 0.1cm in diameter.
Thin Section: Groundmass of plagioclase grains. Phenocrysts of plagioclase, olivine and augite are abundant throughout sample.
Date
Sample collected January, 1969
Contributor
Western Minerals
Spatial Coverage
1.3 miles northeast of Puu o Kawaiwai, Kohala Mt.
Island of Hawaii
Island of Hawaii