Hazama Formation

Type locality: Hazama, Marumori city, Igu county, Miyagi prefecture
Coherent formation
Miocene

Sedimentary facies: Shallow marine, Brackish
Lithofacies: Tuffaceous siltstone

Thickness: ca. 0 - 80 m
Upper limit: Conformity (Yoshigasawa Formation)
Lower limit: Conformity (Ouchi Formation, Upper Member of Kaneyama Formation, Shimizu Tuff), Abut unconformiy (Tenmyosan Volcanic Rocks, Granite)

Kakuda, Miyagi pref.
[ Upper ]
--------------
Yoshigasawa Formation
--------------
Hazama Formation
--------------
Kaneyama Formation
'''''''/,,,,,,
Tenmyosan Vocanic Rocks
--------------
Shiote Formation
--------------
[ Lower ]

Somanakamura, Fukushima pref.
[ Upper ]
--------------
Yoshigasawa Formation
--------------
Hazama Formation
--------------
Ouchi Formation
~~~~~~~~~~~~~~
Ryozen Formation
~~~~~~~~~~~~~~
Tenmyosan Volcanic Rocks
'''''''/,,,,,,
Shiote Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Hazama - Nakadaira - Tabayashi, Marumori city, Igu county, Miyagi pref.; Kosai, Kakuda city, Miyagi pref.
Fossils (Shellfishes): Anadara makiyamai, Calyptraea sp., Crassostrea gravitesta, Crepidula sp., Euspira meisensis, Periploma sp., Phos tsukiyoshianus, Solidicorbula sp.
Fossils (Plants): Acer huziokae, Acer rotundatum, Alangium aequalifolium, Cladrastis sp., Fraxinus sp., Juglans sp., Osmunda sp., Paliurus sp., Pterocarya asymmetrosa, Quercus (Cyclobalanopsis) mandraliscae, Quercus miovariabilis, Quercus nathorstii, Rhus miosuccedanea, Zelkova ungeri
Fossils (Foraminifera): Ammonia sp., Elphidium sp., Nonion sp.

Fujita et al. (1988) Geology of the Kakuda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 99p. (in Japanese with English abstract 9p.)