Yunosawa pyroclastic deposit

[ Top ] [ Japanese ]

Yunosawa pyroclastic deposit Ito et al., 2018

Abbr.: YPD

Phreatic eruption deposit
Holocene (6.6 - 6.3 cal ka, ¹⁴C)

Sedimentary facies: Terrestrial
Sedimentary facies: A kind of flow deposit
Lithofacies: Argilliceous lapilli tuff

Source: Amihari Motoyu spring
Thickness: 50 cm

W8a Unit
[ Upper ]
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Iw-Ph9 Tephra
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Iw-Ph10 Tephra
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Yunosawa pyroclastic deposit
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Iw-W8a Tephra
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[ Lower ]

W8 Unit
[ Upper ]
~~~~~~~~~~~~~~
W8a Unit
~~~~~~~~~~~~~~
W8b Unit
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[ Lower ]

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

Distribution: Yunosawa creek, Amihari hot spring, Shizukuishi city, Iwate county, Iwate pref.

Itoh et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.4, pp.271-296 DOI