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In the Yuanchü-Mienchih border along the Huangho,a very promis-ing early Tertiary basin was known and first reported by Andersson.~1The fauna was later described by Zdansky.~2 Although most of the formsdescribed are in bad condition of preservation,this basin represents so
In the Yuanchü-Mienchih border along the Huangho, a very promis-ing early Tertiary basin was known and first reported by Andersson. ~ 1 The fauna was later described by Zdansky. ~ 2 Although most of the formsdescribed are in bad condition of preservation, this basin represents so