我国东部的白垩纪至早第三纪地层中蕴藏着丰富的燃料、金属、膏盐、天然碱等矿产,具有重要的经济意义。白垩纪至早第三纪又是一个特殊的地史发展阶段,无论是构造运动、沉积建造、古生物,或是古地理、古气候都有其特色。过去大区域的研究工作很少进行,只局限于个别盆地或地区。近几年来,我们开展了中南五省(区)的岩相古地理研究工作,编制了岩相古地理图七张,获得了许多新认识。本区的岩相古地理是在研究地层古生物、沉积韵律和构造发展阶段的基础上进行的。根据地层对比结果,将本区白垩纪至早第三纪分成早白垩世、晚白垩世早中期、晚白垩世晚期至早始新 The Cretaceous to the Early Tertiary strata in the eastern part of our country contain abundant minerals such as fuels, metals, gypsum salts and trona and have important economic significance. The Cretaceous to the Early Tertiary is a special stage of geo-history development. Whether it is tectonic movement, sedimentary construction, paleontology, or paleogeography, paleoclimate has its own characteristics. In the past, research work in large areas was seldom carried out and only restricted to individual basins or areas. In recent years, we conducted lithofacies palaeogeography research in five central and southern provinces (regions) and prepared seven lithofacies paleogeographic maps, gaining many new understandings. The lithofacies palaeogeography in this area is based on the study of the paleontology, depositional rhythm and tectonic development stages of the strata. According to the stratigraphic comparison, the Cretaceous to the Early Tertiary in this area are divided into Early Cretaceous, Early Cretaceous, Middle Cretaceous, Late Cretaceous to Early Cretaceous