MICHAEL MANGA

Neat stuff in the Field

Horoman peridotite (Mt Apoi), Mt Usu, Mt Tarumae, July 2011

This trip was organized by Ikuro Sumita and Atsuko Namiki -- goal was to sample mud from the Niikappu mud volcanoes (which responded many times to earthquakes) and look at domes and deposits from recent eruptions on Hokkaido.


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One of the 8 Niikappu mud volcanoes.


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Searching for signs of ongoing activity.


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Deposits from the mud volcano.


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Banded peridotite at Mt Apoi.


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Showashinsan, a volcanic dome erupted between 1944 and 1945. Detailed growth of the dome was documented by Masao Mimatsu.


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Cookie factory destroyed by the 1990 Usu eruption (notice the holes made by volcanic bombs).


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Retaining walls to protect infrastructure from lahars (volcanic mud flows).


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Consequences of lahars.


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Mt Taramae, an active andesite stratovolcano; the large dome formed in 1739. Most recent eruption was a phreatic eruption in 1982.


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The group at the top of Mt Apoi (where you can find spectacular banded peridotite).


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