Futto Formation

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Futto Formation

Coherent formation
Fluvio-lacustrine basin including Lake Tokai
Pliocene - Pleistocene

Sedimentary facies: Fluvial, Lacustrine
Lithofacies: Interbedded sands and silt
Lithofacies (Minor): Lignite
Sedimentary structures: Cross stratification

Thickness: 100 m or thicker

Tokai Group (Chita, Aichi pref.)
[ Upper ]
?--?--?--?--?-
Futto Formation
--------------
Kowa Formation
--------------
Toyooka Formation
~~~~~~~~~~~~~~
[ Lower ]

Second Setouchi Supergroup (Mie pref. - Aichi pref.)
~~~~~~~~~~~~~~
Tokai Group
~~~~~~~~~~~~~~

[ Upper ]
~~~~~~~~~~~~~~
Second Setouchi Supergroup
?--?--?--?--?-
First Setouchi Supergroup
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Otagawa river, Tokai city, Aichi pref.
Fossils (Plants): Ampetopsis brevipedunculata, Brasenia schreberi, Fortinearia sp., Glyptostrobus sp., Liquidambar sp., Metasequoia disticha, Nuphar akashiensis, Trapa mammillifera
Tephra: Ohta Tephra, Enokido Tephra, Sori Tephra, Yokosuka Tephra

Sakamoto et al. (1986) Geology of the Nagoya-Nambu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 55p. (in Japanese with English abstract 3p.)
Yoshida (1984) Geology of the Yokkaichi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 81p. (in Japanese with English abstract 5p.)