摘要
在地球岩石和其他地质样品中，记录了许多可以反映出地质历史时期的天文过程的信息，其中最显著、研究最多的有米兰柯维奇旋回、潮汐韵律层和天体陨击事件层等。由于天文事件具有全球等时性和瞬时性，且通常具有明显的地化特征和生物特征，是年代地层对比中最为有效的标志层。本文简要介绍了地层记录中这三类天文事件的确认过程以及它们的研究意义。
Sedimentary rocks record many astronomical events that occur during geological past. Among them,Milankovitch cycles ,tidal rhythmites and astronomiacl impact have been paid much attention. The layers,resulted from these events and usually accompanied with geo- chemical and biological changes,are worldwidely synchronous and instantaneous,and can act as effective marker beds in chronostratigraphic correlation. A brief introduction for the three astronomical events laid down in rocks and their implications is presented in this pa- per.
关键词
地层记录
天文事件
固体潮
陨石撞击
天文地质学
astrogeology
Milankovitch cycle
tidal rhythmite
astronomical impact
event stratigraphy
