抚顺盆地下第三系耿家街组孢粉组合及其地质意义

CHARACTERISTIC AND ITS GEOLOGICAL SIGNIFICANCE OF THE PALYNOLOGICAL ASSEMBLEGE OF THE LOWER TERTIARY GENGJIAJIE GROUP IN FUSHUN BASIN

抚顺盆地下第三系经系统的采样、分析、鉴定,发现了丰富的孢粉化石,特别是首次在耿家街组内发现了大量的孢粉化石,填补了以往的空白,为本区有争议的地层(耿家街组)的时代讨论提供了重要的化石依据。根据孢粉组合特征,将耿家街组的时代定为始新世中晚期,孢粉植物群表明该组沉积时期本区发育了常绿、落叶阔叶树为主的森林植被,反映温暖湿润的亚热带—暖温带气候特征。

Through systematical sampling, analyzing and identifying, a plentiful of fossil spores and pollen have been discovered in the Lower Tertiary in Fushun Basin. The fossil spores and pollen discovered in the Gengjiajie Group filled the previous studing gaps and provided important fossil evidence to the solution of the disputed problem about the age in this area.Statistical researches of the palynological assemblege indicate that the Gengjiajie Group is of middle -late Eocene. During the Gengjiajie period, the studied area was covered by a forest vegetation dominated by evergreen and deciduous broadleaf trees, which shows a moist subtropical to warm-temperate climate in that time.