Title
Tholeiitic Basalt
Identifier
HA-12
Description
Hand Sample: Aphanitic vesicular dark gray-black basalt with larger light crystals throughout the sample. The vesicles throughout the sample are elongate in shape, and range in size from 0.5 cm to 2.5 cm. Sample surface displays rough AA texture.
Thin Section: Groundmass of plagioclase, interstitial glass, and microcrystals of clinopyroxenes. In the picture, there is a large plagioclase phenocryst.
Date
Sample collected January, 1969
Contributor
Western Minerals
Spatial Coverage
Northern face of Mauna Loa - Island of Hawaii
Collected from Saddle Road
Collected from Saddle Road
Temporal Coverage
1943
Number of Thin Sections
1