Oyama Formation

Oyama Formation Takimoto, 1935

Type locality: Oyama, Ichishi town, Tsu city, Mie prefecture
Coherent formation
Pliocene

Sedimentary facies: Alluvial fan deposit at the front of Nunobiki mountains
Lithofacies: Gravels
Lithofacies (Minor): Sands, Silt, Clay
Sedimentary structures: Parallel stratification, Imbricate structure
Paleocurrent: from North to South

Thickness: ca. 100 - 120 m
Upper limit: Transitional (Kameyama Formation)
Lower limit: Unconformity (Yakuoji Siltstone and Sandstone Member)

Tokai Group (Kameyama, Mie pref.)
[ Upper ]
?--?--?--?--?-
Kameyama Formation
--------------
Oyama Formation
--------------
Matsusaka 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: Oyama, Ichishi town, Tsu city, Mie pref.; Katada - Lake Sakuraike, Katada town, Tsu city, Mie pref.; Shibukuro town, Tsu city, Mie pref.; Suzuka city, Mie pref.

Hoshi et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.10, pp.679-692 DOI
Yoshida et al. (1995) Geology of the Tsu-Seibu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 136p. (in Japanese with English abstract 6p.)
Yoshida et al. (1991) Geology of the Kuwana District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 154p. (in Japanese with English abstract 5p.)
Yoshida (1984) Geology of the Yokkaichi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 81p. (in Japanese with English abstract 5p.)