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Text Description: Lower Pumice 3-20cm thick lapilli layer, consisting of well-sorted, brown-beige pumice fragments and abundant smaller lithic fragments (23 wt% of layer). The accidental lithic ejecta of PL consist almost entirely of black, dense, vitric material. References:  Stratigraphy, distribution, and evidence for mafic triggering of the ca. 8.5 ka Driftwood Pumice eruption, Makushin Volcano, Alaska, U.S.A. |
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