Heikedaira Unit

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Heikedaira Unit Hara et al., 2014

Type locality: Heikedaira, Naka city, Naka county, Tokushima prefecture
Accretionary complex
Deposition (Limestone): Carboniferous, middle Permian, early - middle Triassic (Fusulinids, Conodonts)
Deposition (Chert): Permian (Radiolarians)
Deposition (Siliceous mudstone): Early Jurassic, Pliensbachian - Toarcian (Radiolarians)
Deposition (Mudstone): Early Jurassic, Pliensbachian - Toarcian (Radiolarians)

Metamorphic facies: 200 - 300 degree C
Lithofacies: Mélange facies, Interbedded sandstone and mudstone
Lithofacies (Minor): Broken facies
Matrix: Mudstone
Exotic blocks (Crusts): Sandstone, Chert, Limestone, Basalt lava, Volcaniclastic rocks, Dolerite
Lithofacies (Minor): Interbedded sandstone and mudstone

Kurosegawa Belt (Sakashu, Tokushima pref., Accretionary complex)
[ Upper ]
/--/--/--/--/-
Heikedaira Unit
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Jiheidani Unit
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Kanbadani Unit
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Hisone Unit
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[ Lower ]

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

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

Distribution: Heikedaira - Yaridogawa river - Nakagawa river - Mononobegawa river, Naka city, Naka county, Tokushima pref.
Fossils: Conodonts
Fossils (Radiolarians): Canoptum spp., Eucyrtidiellum? sp., Natoba spp., Parahsuum longiconicum, Parahsuum ovale
Fossils (Limestone): Fusulinids, Conodonts

Hara et al. (2014) Geology of the Kitagawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 72p. (in Japanese with English abstract 4p.)