Nakato Unit

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Nakato Unit (Sashida, 1992) Ueki and Sakai, 2007

Invalid synonym: Nakato Formation

Type locality: Nakato river, Naguri river, Hanno city, Saitama prefecture
Accretionary complex
Deposition (Mudstone): Middle Jurassic, Aalenian
Accretion: Middle Jurassic
Correlation: Nenoyama Formation, Shomarutoge Formation, Shomaru Formation

Sedimentary facies: Marine
Lithofacies: Sandstone, Mudstone, Interbedded sandstone and mudstone
Lithofacies (Minor): Mélange facies
Matrix: Mudstone
Exotic blocks (Crusts): Basalt lava, Volcaniclastic rocks, Limestone, Chert

Upper limit: Unconformity (Hanno Formation)

Chichibu Belt (eastern Ome, Tokyo)
[ Upper ]
/--/--/--/--/-
Nariki Unit
/--/--/--/--/-
Raidenyama Unit
/--/--/--/--/-
Minokuchi Unit
/--/--/--/--/-
Nitayama Unit
/--/--/--/--/-
Nakato Unit
/--/--/--/--/-
[ Lower ]

Chichibu Belt
[ Upper ]
/--/--/--/--/-
Kurosegawa Belt
/--/--/--/--/-
Northern Chichibu Belt
/--/--/--/--/-
Southern Chichibu Belt
/--/--/--/--/-
[ Lower ]

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

Distribution: Nakato - Nariki river - Iwabuchi, Hanno city, Tokyo

Ueki and Sakai (2007) Geology of the Ome District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 189p. (in Japanese with English abstract 5p.)