Nango Sand Mud Alternation Member

Coherent formation
Pliocene - early Pleistocene

Sedimentary facies: Marine
Sedimentary facies: Forearc basin (Sagara-Kakegawa Basin) deposit
Lithofacies: Interbedded sand and mud
Sedimentary structures: Parallel stratification

Thickness: ca. 25 - 300 m

Upper Kakegawa Formation
[ Upper ]
~~~~~~~~~~~~~~
Aburayama Sand Member
--------------
Hijikata Mud Member
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Nango Sand Mud Alternation Member
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Hosoya Tuffaceous Silt Member
--------------
[ Lower ]

Kakegawa Group (Kakegawa, Shizuoka pref.)
[ Upper ]
--------------
Soga Formation
~~~~~~~~~~~~~~
Upper Kakegawa Formation
--------------
Lower Kakegawa Formation
--------------
[ Lower ]

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

Distribution: Ugari, Fukuroi city, Shizuoka pref.; Sonoda, Mori city, Shuchi county, Shizuoka pref.; Tonbe, Kakegawa city, Shizuoka pref.
Fossils: Coronura sp., Solitary coral (Flabellum sp.), Foraminifera (Baggina totomiensis)
Fossils (Shellfishes): Acila mirabilis, Amussiopecten praesignis, Anadara satowi castellata, Anadara philippiana suzukii, Ancilla albocallosa, Ancilla cf. urashima, Anomia lischkei, Babylonia japonica, Chlamys (Aequipecten) vesiculosus, Crassatellites nans, Glycymeris rotunda, Nassarius caelatus, Neverita reiniana, Pecten tokyoensis, Polinices sagamiensis, Siphonalia declivis biconica, Siphonalia signum imai, Suchium subsuchiense, Tonna luteostoma

Makiyama and Sakamoto (1957) Mitsuke & Kakezuka, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 43p. (in Japanese with English abstract 7p.)