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SAMPLE INFO : 286
Sample ID:286
Station ID:286
Latitude:58.3
Longitude:-154.9
Datum:NAD83
Sample Type 1:Lava
Sample Type 2:Dike
Text Description:
From a dike about 30 feet thick, forming a noticeable 'spire' jutting up from sediments on top of the ridge east of Knife Peak Volcano. The rock is greenish gray feldspar-hornblende andesite-porphyry. Relations in the vicinity suggest that it is an offshoot from a large laccolith to the north.

References:
The Katmai magmatic province

GEOCHEM DATA