Arai Mud Member

[ Top ] [ Japanese ]

Arai Mud Member (Kuroda, 1966)

Type locality: Uchiyama, Arai town, Kosai city, Shizuoka prefecture
Coherent formation
middle Pleistocene

Sedimentary facies: Marsh, Salt marsh
Lithofacies: Mud, Sandy mud, Peat
Lithofacies (Minor): Gravel

Thickness: ca. 2 - 80 m or thicker
Upper limit: Unconformity (Toshima Sand and Gravel Member)
Lower limit: Conformity (Hosoya Sand 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: Uchiyama, Arai town, Kosai city, Shizuoka pref.; Kojima town, Toyohashi city, Aichi pref.
Fossils: Algae (Freshwater)
Fossils (Plants): Acer pictum, Fagus crenata
Fossils (Pollen): Alnus sp., Ilex sp., Typha sp.
Tephra: At-2

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.)