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Zukawa Formation
2.75 - 2.55 Ma, Upper Piacenzian, Pliocene, Toyama Prefecture, Japan
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| Two different types of shark fossil assemblages occur at the same beds
in the same locality. The fossiliferous beds of shark teeth were deposited
in upper Piacenzian. However, the Zukawa Formation was deposited through
whole Piacenzian and uppermost Zanclean (4.04 - 2.55 Ma). The beds contain
shark teeth as granule to pebble-sized gravel. Therefore we consider that
the most shark teeth fossils are reworked from the lower part of the Zukawa
Formation and the Yachi Formation (Miocene). |
| Probably reworked from the Yachi Formation (Miocene) |
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