Hand Sample: Aphanitic dark gray vesicular basalt. The vesicles are uniform and common throughout the sample, with diameters of approx. 0.05 cm.
Thin Section: Groundmass consists of medium size plagioclase with small crystals of pyroxenes. The sample is uniform, with no large phenocrysts. Vesicles (~0.03mm) are present in sample.
Sample collected January, 1969
Number of Thin Sections