Lower Member

[ Top ] [ Japanese ]

Lower Member

Type locality: Nakazawa - Kobuki, Higashimatsushima city, Miyagi prefecture
Coherent formation
Miocene
Correlation: Shiomidai Formation

Lithofacies (Upper): Sandstone
Lithofacies (Middle): Sandstone
Lithofacies (Middle, Minor): Tuff
Lithofacies (Lower): Conglomerate
Sedimentary structures (Upper): Trough cross stratification
Sedimentary structures (Middle): Bioturbation, Pipe rocks

Thickness: 0 - 210 m
Thickness (Lower): a few cm - 1 m or thicker
Upper limit: Bottom of the coarse sandstone bed
Upper limit: Conformity (Upper Member)
Lower limit: Unconformity (Neko Formation, Otsuka Formation)

Mitsuya Formation (Naruse river)
[ Upper ]
--------------
Upper Member / Nemari Tuffaceous Sandstone Member
--------------
Lower Member
~~~~~~~~~~~~~~
[ Lower ]

Shida Group (Matsushima, Miyagi pref.)
[ Upper ]
~~~~~~~~~~~~~~
Omatsuzawa Formation
--------------
Bangamoriyama Formation
~~~~~~~~~~~~~~
Kashimadai Formation
--------------
Hataya Formation
--------------
Mitsuya Formation
~~~~~~~~~~~~~~
Neko Formation
~~~~~~~~~~~~~~
[ Lower ]

Shida Group (Sendai, Miyagi pref.)
[ Upper ]
~~~~~~~~~~~~~~
Nanakita Formation
--------------
Aoso Formation
--------------
Bangamoriyama Formation
~~~~~~~~~~~~~~
Irisugaya Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Nakazawa - Kobuki - Nagane, Higashimatsushima city, Miyagi pref.

Ishii et al. (1982) Geology of the Matsushima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 121p. (in Japanese with English abstract 9p.)