Relationship between eruptive style and vesicularity
of juvenile clasts during eruptive episode A of Towada Volcano, Northeast Japan.
The moderate vesicularity
of pyroclasts, mainly lapilli size, indicates that vesicular texture in the magma developed early during the phreatomagmatic fragmentation by magmaphreatic water interaction (Nemeth et al., 2007).
& WILSON, C.J.N., 1989: A vesicularity
index for pyroclastic deposits.--Bull.
Type of lithology--(subtle differences in andesite lithologies, including any vesicularity
of these clasts ranges from 22 to 59 vol%, a typical feature for coarse-grained strombolian deposits (cf.