Scoria. Median density Phi= -1.09 ; mm= 2.13 . Sorting= 3.6 . Coarse mode of grain size Phi= -2.5 ; mm= 5.66 . Fine mode of grain size Phi= 4.5 ; mm= 0.04
Eruption and deposition of the Fisher Tuff (Alaska): evidence for the evolution of pyroclastic flows
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