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SAMPLE INFO : AL09-05PU
Sample ID:AL09-05PU
Station ID:AL09-05
Latitude:53.88707
Longitude:-166.93202
Datum:NAD83
Date Sampled:2009-00-00
Sample Type 1:Tephra Fall
Text Description:
Upper Pumice is 3-20cm thick and dark yellow-brown, a mixture of brown-beige pumice and dark gray-black scoria (42 wt% and 23 wt% of layer, respectively) and an abundance of non-vitric lithics (32 wt% of layer). Overall the PU lapilli are poorly sorted and vary in mean grain size (6-14mm) with the layer. Scoriaceous clasts are larger tha pumiceous clasts and lithic fragments (mean dia ~5mm and ~3mm, respectively). Scoriaceous bombs up to 10cm in the long dimension occur up to 10km from summit.

References:
Stratigraphy, distribution, and evidence for mafic triggering of the ca. 8.5 ka Driftwood Pumice eruption, Makushin Volcano, Alaska, U.S.A.

SAMPLE LOCATION

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