Paleocene Spread of Deciduous Hardwood Forest in North America and Asia: Megafossil and Palynological Correlations

古新世是中国地质史上的一个重要时期， 现代被子植物科的进化， 落叶双子叶植物在北方半球的扩展 在白垩纪末期的事件之后 本研究将 提高关键字的系统和地层分辨率 中纬度亚洲的古新世和 北美洲西部 与南京合作 地质和古生物研究所，选定古新世 中国西北部和东北部的植物区系 描述时特别注意叶和花粉分类群 与北美的古新世共有 怀俄明州的地层剖面已经提供了 将收集有用的孢粉地层序列， 树叶、果实和花朵，以便将巨型化石与 孢粉分带 将特别注意 到金缕梅科的家庭， 古新世的进化辐射，包括 胡桃科、桦木科、榆科和悬铃木科。 在 此外，将尝试校准孢粉学 和具有陆地哺乳动物阶段的大花区，和/或 辐射计测年单位。

The Paleocene was an important interval in the evolution of modern families of angiosperms and in the rapid spread of deciduous dicotyledons in the Northern Hemisphere following the terminal Cretaceous event. This study will improve the systematic and stratigraphic resolution of key genera shared between the Paleocene of mid-latitude Asia and western North America. In cooperation with the Nanjing Institute of Geology and Paleontology, selected Paleocene floras in northwestern and northeastern China will be described with particular attention to leaf and pollen taxa that are shared with the Paleocene of North America. Stratigraphic sections in Wyoming that have already provided useful palynostratigraphic sequences will be recollected for leaves, fruits and flowers in order to link megafossils with the palynological zonation. Special attention will be given to families of the Hamamelidae that were undergoing evolutionary radiations through the Paleocene, including Juglandacea, Betulaceae, Ulmacea, and Platanaceae. In addition, attempts will be made to calibrate palynological and megafloral zones with land mammal stages and/or radiometrically dated units.