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.
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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