凤台组中的“管柱石”及其地质意义

在皖北上震旦统凤台组顶部发现一种特殊构造——管柱石。有人认为它是“蠕虫化石”、“海生动物潜穴”,并进而推断凤台组应属寒武纪的海相沉积。本研究结果认为管柱石系在凤台组成岩后,在地表或近地表环境下,经风化、溶蚀——沉积、充填而形成。非生物成因。不能用以确定地层时代,也不能籍以否定凤台组的冰川成因。虽然如此,它对说明其本身形成时的古地理、古气候和古构造环境还是很有意义的。

PIPE HOLE-FILLED PILLAR IN FENTAI GROUP AND ITS GEOLOGICAL SIGNIFICANCE

A special structure , pipe hole-filled pillar , has been found at the top of Fentai Group in North Anhui , Someone thought it to be worm fossil or suffosion hole of marine animal and then inferred thet Fantai Group belongs to marine sedimentation in Cambrian Period . Result fram the research by author indicates that pipe hole-filled pillar was formed through weathering dissolutionsedimentatian and filling in the Condition of the earth's surface or subsurface after rock-forming of Fentai Group. It is nonbiological origin and can not be used in determining stratum age and negating the glacial origin of Fentai Group, ft is very significant, however to state the environment of paleogeography , paleo climate and paleostructure when pipe hole-filled pillar formed .