[ Top ] [ Japanese ]
Unpenji Sandstone Member (Nakagawa, 1961) Noda et al., 1997
Invalid name: Umpenji Sandstone, Mandatogegoe Formation
- Type locality: Mount Unpenjisan, Onohara town, Kanonji city, Kagawa prefecture
- Coherent formation
- Izumi sedimentary basin
- Forearc basin associated with strike-slip fault related to Median Tectonic Line
- Late Cretaceous, middle Campanian (78.3 Ma, U-Pb)
- Interfingered: Hiketa Formation
- Sedimentary facies: Upper - Lower submarine fan
- Sedimentary facies: High-density turbidity current
- Lithofacies: Sandstone-dominant interbedded sandstone and mudstone
- Lithofacies (Minor): Conglomerate, Felsic tuff
- Sedimentary structures: Graded bedding, Parallel stratification, Slump structure
- Paleocurrent: to Southwest - West-southwest
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Mount Unpenjisan - Mount Churenjimine, Kanonji city, Kagawa pref.; Yamawaki - Shioiri, Manno city, Nakatado county, Kagawa pref.; Kinsei town, Shikokuchuo city, Ehime pref.; Higashiyama, Higashimiyoshi city, Miyoshi county, Tokushima pref.
- Fossils (Ammonoids): Metaplacenticeras subtiliastum
- Fossils (Radiolarians): Amphipyndax pseudoconulus, Amphipyndax stocki, Amphipyndax tylotus, Archaeodictyomitra simplex, Cryptamphorella sphaerica, Dictyomitra densicostata, Pseudotheocampe abschnitta
- Noda et al. (2021) Geology of the Ikeda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 150p. (in Japanese with English abstract 5p.)
- Noda et al. (2017) Geology of the Kan-onji District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 96p. (in Japanese with English abstract 4p.)