COMMENTS ON THE CAMBRIAN/NEOPROTEROZOIC BOUNDARY IN HUAIBEI DISTRICT, NORTHERN ANHUI-JIANGSU

Lower Cambrian and Neoproterozoic strata are well developed in Huaibei, northern Anhui Jiangsu, eastern China. However, researchers pay little attention to investigate the Cambrian/Neoprotero zoic boundary, several different proposals for that boundary in the past literatures exist some unsolved problems. On the basis of detailed lithologic study with well preserved Cambrian small shelly fossils and Neoproterozoic carbonaceous remains and stromatolite assemblages, it is suggested here that the Cambrian/Neoproterozoic boundary could be placed at the interface between the Changping and Gouhou Formations. In addition, we correct the so called Lower Cambrian “Houjiashan Formation” to be “Changping Formation” in the working area because the lithology and fossils of that Lower Cambrian unit are much similar to the Changping Formation that is widely distributed in the adjacent North China Platform.