[ Top ] [ Japanese ]
Nagao Formation Shiba et al., 1989
- Coherent formation
- Trough basin-fill deposit at the collision boundary between Izu-Bonin-Mariana arc and Southwest - East Japan island arc
- Back-arc basin volcanic activity at the back-arc basin of Izu-Bonin-Mariana arc
- late Miocene - Pliocene
- Sedimentary facies: Marine
- Lithofacies: Interbedded sandstone and mudstone
- Lithofacies (Minor): Sandstone
- Sedimentary structures: Slump structures
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Shizuoka pref.
- Fossils (Foraminifera): Candeina nitida, Globigerina nepenthes, Globoquadrina venezuelana, Neogloboquadrina acostaensis
- Sugiyama and Shimokawa (1990) Geology of the Shimizu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 103p. (in Japanese with English abstract 8p.)