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Sample info : 74-AMm-86
Sample ID:74-AMm-86
Station ID:74-AMm-86
Date Sampled:1974-00-00
Sample Type 1:Lava
Field Lithology:Dacite
Sample Unit:Qedd
Text Description:
Early Dacite Domes and Associated Flows. Three hornblende dacite domes (1, 2, 3) on east flank of Mount Drum were apparently erupted early in dome-building stage of second cycle of volcanic activity and may represent a distinct phase of second cycle associated with cone-building two-pyroxene andesite and dacite flows (Qzaf). All domes have been dissected by erosion, and dome 1, an extensive dome-flow complex with a surface area greater than 10 sq km, is overlain by widespread deposits of glacial drift (Qog).

Geologic map of the Gulkana A-2 quadrangle, Alaska

Sample Location

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