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Muro Pyroclastic Flow Deposit
Synonym: Muro Ignimbrite
Synonym: Sekibutsu Tuff Member (Marginal facies), Tamateyama Tuff Bed (Marginal facies), Furudera Tuff (Marginal facies)
It had been considered a member of Setouchi Volcanic Rocks.
- Type locality: Muro, Uda city, Nara prefecture
- Outflow deposit from a caldera volcano
- Volcanic rocks
- Miocene (16 - 13.5 Ma, K-Ar; 15.7 - 14.9 Ma, FT;14.3 Ma, Ar-Ar)
- Correlation: Kbi, Kn-1?
- Sedimentary facies: Terrestrial
- Lithofacies: Pyroclastic flow deposit
- Lithofacies: Orthopyroxene-biotite rhyolite - dacite welded volcanic lapilli tuff
- Lithofacies (Minor): Obsidian, Volcanic ash
- Lithofacies (Accidental fragments): None
- Lithofacies (Basal facies): Volcanic ash
- Lithofacies (Basal facies, Accidental fragments): Chert, Mudstone
- Source: central - eastern Kii peninsula (Kumano Acidic Rocks or Odai caldera)
- Mode of eruption: Plinian
- Eruptive volume (Present): ca. 62 km3
- Eruptive volume (Original): 100 km3 or more
- Thickness (Overall): ca. 400 m
- Thickness (Basal): 20 m or thinner
- Distribution (East-West): ca. 28 km
- Distribution (South-North): ca. 15 km
- Running distance: 50 km or more
- Muro Pyroclastic Flow Deposit
- [ Upper ]
- --------------
- Main facies
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- Basal facies
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- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: middle east of Nara pref.; eastern margin of Osaka pref.; middle west of Mie pref.
- Distribution: Byobu-iwa, Soni city, Nara pref.; Muro, Uda city, Nara pref.
- Sato et al. (2012) Jour. Geol. Soc. Japan, vol.118, Supplement, pp.53-69 DOI
- Shinjoe et al. (2010) Jour. Geol. Soc. Japan, vol.116, no.8, pp.447-452 DOI
- Iwano et al. (2009) Jour. Geol. Soc. Japan, vol.115, no.8, pp.427-432 DOI
- Yamashita et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.7, pp.340-352 DOI
- Iwano et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.7, pp.326-339 DOI
- Shinjoe et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.7, pp.310-325 DOI
- Ozaki et al. (2000) Geology of the Nara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 162p. (in Japanese with English abstract 5p.)