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Minamiyama Gravel Bed Makiyama, 1963
Invalid synonym: Bonoya Formation, Ichinoya Formation
- Type locality: Ima, Kikukawa city, Shizuoka prefecture
- Coherent formation
- early - middle Pleistocene
- Correlation: Iwaoji? Formation
- Sedimentary facies: Marine
- Sedimentary facies: Alluvial fan delta or Submarine channel-fill deposit
- Lithofacies: Gravels
- Lithofacies (Minor): Sands, Silt
- Sedimentary structures: Trough cross-stratification
- Ogasa Group
- [ Upper ]
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- Minamiyama Gravel Bed
- ~~~~~~~~~~~~~~
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Ima - Kato, Kikukawa city, Shizuoka pref.; Shiobarashinden, Omaezaki city, Shizuoka pref.
- Fossils: Plants
- Fossils (Shellfishes): Amussiopecten sp., Anomia chinensis, Batillus aff. cornutus, Chlamys sp., Crassostrea gigas, Glycymeris nakamurai, Neverita didyma, Pristitebra ugariensis, Scaplirca castella?, Siphonalia sp., Suchium sp.
- Fossils (Foraminifera): Globigerina decoraperta, Globigerina falconensis, Globigerina pachyderma, Globigerina quinqueloba, Globigerina rubescens, Globigerinita glutinata, Globigerinita humilis, Globigerinita iota, Globigerinita uvula, Globigerinoides quadrilobatus immatura, Globigerinoides quadrilobatus trilobus, Globigerinoides ruber, Globigerinoides sacculifer, Globorotalia acostaensis acostaensis, Globorotalia acostaensis humelosa, Globorotalia acostaensis pseudopima, Globorotalia caltrata, Globorotalia crassaformis, Globorotalia obesa, Globorotalia tosaensis, Globorotalia truncatulinoides, Pulleniatina obliquiloculata
- Fossils (Pollen): Abies sp., Alnus sp., Artemisia sp., Betula sp., Carduoideae, Castanea sp., Chenopodiaceae, Cyperaceae, Fagus sp., Fraxinus sp., Gramineae, Larix-Pseudotsuga sp., Lycopodium sp., Picea sp., Pinus (Diploxylon) sp., Pinus (Haploxylon) sp., Pterocarya sp., Quercus (Lepidobalanus) sp., Sciadopitys sp., Taxodiaceae, Tsuga sp., Typha sp., Ulmus-Zelkova sp.
- Sugiyama et al. (1988) Geology of the Omaezaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 153p. (in Japanese with English abstract 6p.)