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VOLATILES, MAGMA MIXING, AND THE MECHANISM OF ERUPTION AT AUGUSTINE VOLCANO, ALASKA
citation imageJohnston, D. A., 1978, Volatiles, magma mixing, and the mechanism of eruption at Augustine volcano, Alaska: University of Washington Ph.D. dissertation, 187 p., 20 plates, scale unknown.

DATA TABLES *Not all tables in a publication may be listed. Not all tables from a publication have data entered in the database.
4221: Composition of groundmass of pumices and blocks erupted in January and February (Wt.%).
View table data :: Download table data (.csv)
* a. Na2O-analyses are unreliable due to volatilization during microprobe analysis. Each reported analysis is an average of 5-20 separate spot analyses. In separate microprobe runs no attempts were made to reoccupy earlier analysis spots. Due to the presence of microcrystals in the groundmass of andesitic pumices, analyses 1 and 2 in this table are unreliable. Standard deviation reported for analysis 3 is typical of rhyolitic glasses. *

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