我国东部第四纪的海陆过渡相地层

第四纪期间我国海区的海面升降,以及东部沿海第四纪海侵的研究,近年来已经引起地质工作者的广泛注意。有孔虫、介形虫、孢粉等微体化石的运用,在海侵研究中起着十分重要的作用。然而,在寻找海侵地层的过程中也出现了一种值得注意的倾向,那就是把凡是找到一点海相化石(如有孔虫)的地层,统统叫做海相层,一概划在海岸线之外。

QUATERNARY STRATIGRAPHY OF MARINE-CONTINENTAL TRANSITIONAL FACIES IN EAST CHINA

The strat igraphy of Quaternary transgressions in East China are mainly marine-continental transitional sediments rather than marine ones. According to the data of 36 drillings on the coast plains, the marine-continental transitional sediments are in thickness 2.38 times that of the marine sediment. These two facies triaybe easily distinguished accnching to micropaleontlogical criteria provided by the results . of micropaleontological analyses of huridreds of surface, samples, taken from, different depositional environments, ianging :from . peen seas, river mouths and guefs, lagoons, littoral zones, fresh-water .and saline lakesa, from Liaodons Peninsula in the North to the Hainan Island, in the South. Moreover, different. estuaries, littoral and lagoonal tacies are recogniz can be identitcid by the withinthe transitional stratrgrapluial tacies.