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Terasawa Mud Member (Kuroda, 1958)

Invalid synonym: Ikobe Silt member

• Type locality: Ikobe, Toyohashi city, Aichi prefecture
• Coherent formation
• middle Pleistocene
• Contemporaneous heterotopic facies: Takamatsu Muddy Sand Member

• Sedimentary facies: Drowned valley, Shallow inner bay
• Sedimentary facies: Tidal zone, Lagoon
• Lithofacies: Silty sand, Sandy silt, Silt
• Sedimentary structures: Channel structure
• Sedimentary structures (Basal): Parallel stratification

• Thickness: ca. 10 m
• Upper limit: Transitional (Sugiyama Sand Member)
• Lower limit: Transitional (Tonami Gravel Member)

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

• Distribution: Ikobe town - Takatsuka town, Toyohashi city, Aichi pref.; Nishihamada, Mutsure town, Tahara city, Aichi pref.
• Fossils: Trace fossils, Pipe rocks
• Fossils (Shellfishes): Anadara granosa, Anomia chinensis, Batillari multiformis, Cerithidea djadjariensis, Dosinia angulosa, Raetellops pulchellus
• Fossils (Plants): Alnus japonica, Fagus aff. hayatae, Larix kaempferi, Picea maximowiczii, Quercus (Cyclobalanopsis) sp.
• Fossils (Pollen): Alnus sp., Fagus sp., Quercus (Lepidobalanus) sp.
• Tephra: Ikb-1

• 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