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Takamatsu Muddy Sand Member (Hayasaka, 1961)

Invalid synonym: Takamatsu Silt Facies, Takamatsu Shell Sand Facies

• Type locality: Takamatsu town, Tahara city, Aichi prefecture
• Coherent formation
• middle Pleistocene (0.44 Ma, ESR)
• Contemporaneous heterotopic facies: Terasawa Mud Member

• Sedimentary facies: Marine, Brackish
• Sedimentary facies (Upper): Inner bay facing open sea
• Sedimentary facies (Middle): Inner part of bay
• Sedimentary facies (Lower): River mouth
• Lithofacies (Upper): Muddy sands
• Lithofacies (Middle): Gravel-bearing sandy mud
• Lithofacies (Lower): Mud
• Sedimentary structures: Upward-coarsening

• Thickness: 8 m or thicker
• Upper limit: Conformity (Sugiyama Sand Member)
• Lower limit: Conformity (Tonami Gravel Member)

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

• Distribution: Takamatsu town, Tahara city, Aichi pref.
• Fossils: Squids (Sepia sp.), Foraminifera, Ostracods (Pontocythere sp.), Calcareous nannofossils (Cephyrocapsa oceanica, Pseudoemiliania lacunosa)
• Fossils (Shellfishes): Anadara granosa, Arca boucardi, Batillaria zonalis, Cyclina sinensis, Dosinia angulosa, Mya japonica, Panopea japonica, Paphia undulata, Pecten albicans, Raetellops pulchellus, Solen krusensterni, Tonna luteostoma
• Fossils (Plants): Abies firma, Cinnamomum japonicum, Fagus aff. hayatae, Machilus thunbergii
• Fossils (Pollen): Fagus sp., Pinus (Diploxylon) sp., Quercus (Lepidobalanus) sp.
• Fossils (Trace fossils): Rosselia isp.

• Nakashima et al. (2008) Geology of the Toyohashi and Tahara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 113p. (in Japanese with English abstract 3p.)
• Nakashima et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.2, pp.70-79 DOI