AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 57

SAMPLE INFO : 57
Sample ID:57
Station ID:57
Latitude:57.0179
Longitude:-157.1864
Datum:NAD83
Sample Type 1:Lava
Text Description:
Texture: Porphyry; groundmass <0.1 mm, massive, plagioclase > hornblende > opaque; quartz phenocrysts embayed and rounded; rare euhedral apatite microphenocrysts. Alteration: Hornblende altered to chlorite/opaque/pyroxene

References:
Petrography, chemistry, and geologic history of Yantarni volcano, Aleutian volcanic arc, Alaska

GEOCHEM DATA