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SAMPLE INFO : 05MZPK-09
Sample ID:05MZPK-09
Station ID:05MZPK-09
Latitude:53.49037
Longitude:-166.56785
Datum:NAD83
Date Sampled:2005-01-01
Sample Type 1:Tephra Fall
 Text Description:
(Angela’s Cone): Sample collected by M. Zimmer and A. Roach. Loosely coherent tephra from pyroclastic flow at Angela’s Cone, a newly-discovered, parasitic cinder cone on southern flank of Makushin volcano. Angela’s Cone is almost entirely dissected by ice, streams, and weathering, and shows no signs of recent activity. Groundmass is red-orange and extremely altered, with 1-3 mm dark clasts evenly distributed throughout (~30%). Phenocrysts of olivine and clinopyroxene, with 2 mm crystal clots. Olivines contain oxides, and lighter and darker green clinopyroxene populations were observed. Some olivines have an orange tint and are likely altered. Yielded olivine- hosted melt inclusions.

References:
The role of water in generating the calc-alkaline trend: new volatile data for Aleutian magmas and a new tholeiitic index

SAMPLE LOCATION

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