AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 50

SAMPLE INFO : 50
Sample ID:50
Station ID:50
Latitude:57.0179
Longitude:-157.1864
Datum:NAD83
Sample Type 1:Lava
Text Description:
Texture: Porphyry; groundmass <0.1 mm, massive plagioclase >> chlorite = mica; quartz as anhedral mosaics (xenolithics); apatite microphenocrysts. Alteration: Plagioclase altered to chlorite/mica, hornblende to chlorite/hematite; veinlets of hematite/calcite/mica

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

GEOCHEM DATA