Title
Tholeiitic Olivine Basalt
Identifier
HA-7
Description
Hand Sample: Aphanitic medium gray vesicular basalt with scattered olivine crystals. Olivine crystals are scattered throughout the sample and are either growing in clusters or as single crystals. Olivine crystals range in size from 0.05cm to 0.5cm in diameter. Vesicles are common in sample and range in diameter from 0.05cm to 2cm.
Thin Section: Aphanitic groundmass of plagioclase, interstitial glass, and microcrystals of clinopyroxene. Phenocrysts of olivine and pyroxenes are present in the picture. Vesicles are large but not as numerous as phenocrysts.
Date
Sample collected January, 1969
Contributor
Western Minerals
Spatial Coverage
Kiluea Volcano - Island of Hawaii
Temporal Coverage
Feb. 12, 1960
Number of Thin Sections
1