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张宏,柳小明,张晔卿等.2005.冀北滦平-辽西凌源地区张家口组火山岩顶、底的单颗粒锆石U-Pb测年及意义.地球科学-中国地质大学学报,30(4):387～401 Fiet N,Quidelleur X,Parizi O et al.2006.Lower Cretaceous stage durations combining rdiometric data and orbital chronology:Towards a more sta-ble relative t...