Tahara Formation

[ Top ] [ Japanese ]

Tahara Formation (Kuroda, 1958)

Invalid synonym: Toyohashi Group

Type locality: Ikobe, Toyohashi city, Aichi prefecture
Coherent formation
middle Pleistocene (MIS 11)

Sedimentary facies (Top): Seashore
Sedimentary facies (Upper): Offshore - Shoreface facing open sea
Sedimentary facies (Lower): Drowned valley - Small bay
Sedimentary facies (Bottom): Fluvial
Lithofacies: Gravels, Sands, Mud

Thickness: ca. 40 m
Upper limit: Unconformity (Toyohashi Formation)
Lower limit: Unconformity (Futagawa Formation)

Tahara Formation
[ Upper ]
~~~~~~~~~~~~~~
Toshima Sand and Gravel Member
--------------
Kanbe Gravel Member
--------------
Akasawa Mud Member
--------------
Ikobe 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: Ikobe - Nishiakazawa town - Sugiyama town - Nishinanane town, Toyohashi city, Aichi pref.; Toshima town - Ura town - Okusa town, Tahara city, Aichi pref.; Gumihara - Nishihamada, Mutsure town, Tahara city, Aichi pref.; west coast of Lake Hamana, Kosai city, Shizuoka pref.

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