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Shimanto Belt (Ehara, 1926)

Synonym: Shimanto Supergroup, Shimanto Group, Shimanto Formation

Protolith of Sanbagawa Belt, Ryoke Belt

• Type locality: Shimanto river, Kochi prefecture
• Accretionary complex
• Deposition: Cretaceous - Neogene
• Deposition (Northern Shimant Belt of North Belt of Shimanto Belt): Early Cretaceous, Aptian - Late Cretaceous, Santonian
• Deposition (Middle Shimant Belt of North Belt of Shimanto Belt): Late Cretaceous, Coniacian - Maastrichtian
• Deposition (Southern Shimant Belt of North Belt of Shimanto Belt): Late Cretaceous, Maastrichtian
• Deposition (Akaishi mountains): Early Cretaceous, Albian - Paleocene (Radiolarians)
• Accretion: Neogene
• Correlation: Asemigawa Unit

• Sedimentary facies: Marine
• Lithofacies: Turbidite, Interbedded sandstone and mudstone, Mélange
• Lithofacies (Northern Shimant Belt of North Belt of Shimanto Belt): Allenitic sandstone, Interbedded sandstone and mudstone
• Lithofacies (Northern Shimant Belt of North Belt of Shimanto Belt, Olistostrome): Limestone, Chert
• Lithofacies (Middle Shimant Belt of North Belt of Shimanto Belt, Upper, Matrix): Mudstone
• Lithofacies (Middle Shimant Belt of North Belt of Shimanto Belt, Upper, Crusts): Basalt, Chert
• Lithofacies (Middle Shimant Belt of North Belt of Shimanto Belt, Lower): Sandstone with volcanic fragments, Interbedded sandstone and mudstone
• Lithofacies (Southern Shimant Belt of North Belt of Shimanto Belt): Mudstone mélange

• Upper limit: Butsuzo Tectonic Line (Chichibu Belt)
• Upper limit (central Kii peninsula): Omine-Odai Thrust (Southern Chichibu Belt)

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

• Distribution: Boso peninsula - southern Kanto - Akaishi mountains - Kii peninsula, southern Shikoku - southern Kyushu - Okinawa

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