Nanane Sandy Mud Member

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Nanane Sandy Mud Member (Kuroda, 1958)

Invalid synonym: Sandy silt Member

Type locality: Higashinanane coast, Higashinanane, Toyohashi city, Aichi prefecture
Coherent formation
middle Pleistocene
Intruded by: Clastic dikes

Sedimentary facies: Marine
Sedimentary facies: Inner bay, Lagoon
Climate: Warn
Lithofacies: Interbedded silty sands and silt/sandy silt
Lithofacies (Minor): Mud, Peat
Sedimentary structures: Parallel stratification

Thickness: ca. 3 m
Upper limit: Transitional (Hosoya Sand Member), Unconformity (Toshima Sand and Gravel Member, Ikobe Gravel Member)

Futagawa Formation
[ Upper ]
~~~~~~~~~~~~~~
Arai Mud Member
--------------
Hosoya Sand Member
--------------
Nanane Sandy Mud 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: Higashinanane coast - Takatsuka town - Kojima town, Toyohashi city, Aichi pref.; west coast of Lake Hamana, Kosai city, Shizuoka pref.
Fossils: Baleen whales (Vertebra)
Fossils (Shellfishes): Comphia neastartoides, Raetellops pulchellus, Solen krusenterni
Fossils (Plants): Alnus japonica, Chamaecyparis pisifer, Fagus microcarba

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