Tholeiitic Basalt

Title

Tholeiitic Basalt

Identifier

HA-13

Description

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.

Date

Sample collected January, 1969

Contributor

Western Minerals

Is Part Of

Volcanic Phenomena Suite - The Hawaiian Islands of Hawaii and Oahu

Spatial Coverage

Northern face of Mauna Loa - Island of Hawaii
Collected on Saddle Road

Temporal Coverage

1943