Scoria. Median density Phi= -0.33 ; mm= 1.26 . Sorting= 1.82 . Coarse mode of grain size Phi= -0.5 ; mm= 1.41 . Fine mode of grain size Phi= 4 ; mm= 0.06
Eruption and deposition of the Fisher Tuff (Alaska): evidence for the evolution of pyroclastic flows
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