Abstract
The Uonuma Group is typical deposits with quite thickness of early Pleistocene Period in the area along the Japan Sea.The distribution of the Uonuma Group in Niigata Prefecture is shown in Fig. 1.In the present paper, the litho-stratigraphy, floral change and paleo-magnetic stratigraphy of the Uonuma Group are summarized as shown in Fig. 2.Furthermore, some important problems concerning the Uonuma Group are discussed.
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