河南西峡盆地红层划分及沉积相研究

从岩性岩相出发，结合恐龙蛋化石的组合特征及其它生物化石、同位素年龄等，对西峡盆地红层进行了划分，自下而上依次为：高沟组、马家村组、寺沟组，并对其沉积相进行了研究。研究认为高沟组沉积环境有三类，其沉积相为冲击扇相、洪积扇相及河流相组成的混合相；马家村组为较稳定的河流沉积环境，沉积物巨厚，发育交错层理；寺沟组的沉积环境为冲积滨浅湖相，见有小型交错层理和水平层理。

STRATIGRAPHY AND SEDIMENTARY FACIES OF RED BEDS IN XIXIA BASIN OF HENAN PROVINCE

Xixia basin is situated at the southeast edge of Henan province. It is one of the most important localities of the fossil dinosaur eggs in the world. Red clastic sediments mixed sand, gravel,mud and lime mud occurred within the late Cretaceous pullapart Xixia basin. At present,there are not only many debates on subdirision of stratigraphy, but also much confusion in stratigraphic nomenclature. A detailed study on this basin has made possible to establish the normal stratigraphical sequence. The correct subdivision of red beds includes the Gaogou, Majiacun and Sigou formations from bottom to top. The sequence is based on the type of fossil dinosaur eggs and their distribution, lithology, sedimentary facies, microfossils,formation and evolution of the basin,absolute age dating, etc.