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Field excursion in Chiba
We visited the Kioroshi Formation distributed in Inzai, Chiba. The formation contains variety of bivalves, gastropods, ichnofossils, and microfossils. Students measured and analyzed the strata for identifying changes in depositional environment.
Students measuring and analyzing
the strata including shell beds.
Shell beds with convex-up bivalves
are crosscut by bioturbations.
A tuberculate gastropod, Rapana venosa,
is coming out from the outcrop.