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HS Tephra

Abbr.: HS

• Type locality: Hata forest road, Shirahama town, Minamiboso city, Chiba prefecture
• Tephra
• Pliocene - Pleistocene

• Lithofacies: Pumice

• Host: Mera Formation, Hata Formation

• Distribution: Hata forest road, , Shirahama town, Minamiboso city, Chiba pref.; Mano - Uda - Setogawa river, Chikura town, Minamiboso city, Chiba pref.; Ryuoka, Tateyama city, Chiba pref.

• Kawakami and Shishikura (2006) Geology of the Tateyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 82p. (in Japanese with English abstract 5p.)