Tholeiitic Basalt

Identifier

HA-1

Description

Hand Sample: Aphanitic vesicular dark gray-black basalt. Sample contains numerous vesicles ranging in size from 0.01cm to 1.5 cm.
Thin Section: Groundmass of aphanitic plagioclase. Plagioclase grains vary in size with some larger grains throughout sample. Numerous vesicles are present throughout thin section.

Date

Sample collected January, 1969

Contributor

Temporal Coverage

Geolocation