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Cr Tephra
Abbr.: Cr
- Sedimentary facies: Marine
- Lithofacies: Scoriaceous tuff
- Distribution: Totsuka town - Kamikurata town, Totsuka ward, Yokohama city, Kanagawa pref.; Noba town - Kamioka, Konan ward, Yokohama city, Kanagawa pref.; Byobugaura, Isogo ward, Yokohama city, Kanagawa pref.; Bessho town, Minami ward, Yokohama city, Kanagawa pref.
- Fossils: Bivalves
- Mitsunashi and Kikuchi (1982) Geology of the Yokohama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 105p. (in Japanese with English abstract 4p.)