Adachi-Medeshima Pumice Bed

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Adachi-Medeshima Pumice Bed (Nakagawa et al., 1960) Kanizawa, 1985 (Photo)

Type locality: Jusantsuka, Medeshima, Natori city, Miyagi prefecture
Volcanic rocks
Pleistocene (80 ka)

Sedimentary facies: Under water
Lithofacies: Pumiceous coarse tuff
Lithofacies: Dacitic, including cummingtonite

Source: Adachi Volcano, Adachi, Kawasaki city, Shibata county, Miyagi pref.
Mode of eruption: Plinian
Thickness: 1- 7 m
Lower limit: Conformity (Dainohara Terrace Deposit)

Sendai
[ Upper ]
+--+--+--+--+-
Sendai-shimomachi Terrace Deposit
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Nagano Volcanic Ash
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Sendai-nakamachi Terrace Deposit
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Sendai-kamimachi Terrace Deposit
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Adachi-Medeshima Pumice Bed
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Dainohara Terrace Deposit
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[ Lower ]

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

Distribution: Sendai city, Miyagi pref.; Ayashi, Aoba-ku, Sendai city, Miyagi pref.; Medeshima - Azukishima, Natori city, Miyagi pref.; Murata city, Shibata county, Miyagi pref.

Miyamoto et al. (2013) Jour. Geol. Soc. Japan, vol.119, Supplement, pp.27-46 DOI
Kitamura et al. (1986) Geology of the Sendai District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 134p. (in Japanese with English abstract 9p.)
Oide and Fujita (1975) Geology of the Iwanuma District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 27p. (in Japanese with English abstract 4p.)