Washizu Mud Member

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Washizu Mud Member Kuroda, 1966

Coherent formation
middle Pleistocene

Sedimentary facies: Offshore - Shoreface facing open sea
Lithofacies: Mud

Upper limit: Conformity (Sugiyama Sand Member)
Lower limit: Conformity (Tonami Gravel Member)

Toyohashi Formation (Lake Hamanako, Shizuoka pref.)
[ Upper ]
~~~~~~~~~~~~~~
Tenpakubara Gravel Member
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Sugiyama Sand Member
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Washizu Mud Member
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Tonami Gravel Member
~~~~~~~~~~~~~~
[ Lower ]

Atsumi Group
[ Upper ]
~~~~~~~~~~~~~~
Gumihara Formation
~~~~~~~~~~~~~~
Toyohashi Formation
~~~~~~~~~~~~~~
Tahara Formation
~~~~~~~~~~~~~~
Futagawa Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Kosai city - Arai town, Shizuoka pref.
Fossils (Shellfishes): Rhaeta yokohamensis, Striarca tenebrica, Umbonium sp., Venerupis variegata, Vosella nipponica
Fossils (Plants): Trapa macropoda
Tephra: At-5

Nakashima et al. (2008) Geology of the Toyohashi and Tahara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 113p. (in Japanese with English abstract 3p.)
Nakashima et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.2, pp.70-79 DOI
Isomi and Inoue (1999) Geology of the Hamamatsu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 35p. (in Japanese with English abstract 4p.)