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Onjuku Shell Bed

• Coherent formation
• Holocene (8,751 - 8,532 calBP)

• Lithofacies: Muddy sand

• Distribution: Rokken town, Onjuku city, Isumi county, Chiba pref.
• Fossils (Shellfishes): Corbiculidae sp., Macoma sectior, Penitella kamakurensis

• Utsunomiya and Ooi (2019) Geology of the Kazusa-Ohara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 127p. (in Japanese with English abstract 4p.)