Hand Sample: Aphanitic dark gray vesicular basalt. Basalt has ropey pahoehoe texture on top surface and contains numerous elongated vesicles.
Thin Section: Groundmass of glass, plagioclase and microcrystals of clinopyroxenes. The plagioclase crystals are elongated in shape and the clinopyroxenes have a block like shape. Numerous vesicles are present in the thin section.
Sample collected January, 1969
Number of Thin Sections