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SAMPLE INFO : 90ADg-3
Sample ID:90ADg-3
Station ID:90ADg-3
Latitude:61.4055
Longitude:-141.6965
Datum:NAD83
Date Sampled:1990-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Dacite
Text Description:
Summit lava; Flow-banded dacite that underlies tephra. Pyroxene-bearing, hornblende dacite, mineralogically distinct from the tephra. Plagioclase from the dacite yielded a K/Ar date of 119 +/- 17 ka (N. Shew, written communication, 1991).

References:
Mount Churchill, Alaska: source of the late Holocene White River Ash

GEOCHEM DATA