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Haratashino@Formation
Miocene, Tomioka Group, Annaka-shi, Gunma Prefecture, Japan
ver. 2.1
There is a localitiy on the riverbank of the Usui River running through
Gunma Prefecture. This locality produces beautiful shark teeth such as
Megalodon and hastalis. A lot of pretty small shark teeth were found at a narrow area, about
several meters wide and ten meters in length of the river bank. Most of
them were deep sea sharks. Squaloids were dominant among them and found
to be consist of four genera. Etomopterus was the most abundunt species among them. The locality also yields a vareity
of dermal denticles accompanied with shark teeth. |
ver. 2.1 20090804 (ver. 1.0 20000615 Tukahara F. )
Fumio Nakagawa
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