论文部分内容阅读
引言在确立日本晚第三纪生物年代格架方面,已通过详细的生物地层学结合浮游微体化石、放射性年龄测定和磁性地层学的新资料取得了新进展(Tsuchi,1984a;Tsuchi 等,1984)。这
INTRODUCTION New advances have been made in the establishment of the Late Miocene frameworks in Japan through detailed bio-stratigraphy combined with new data on planktonic fossils, radioactive age determination and magnetic stratigraphy (Tsuchi 1984a; Tsuchi et al 1984 ). This