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EVENT STRATIGRAPHY AND EXTRATERRESTRIAL CATASTROPHIC EVENT

Zhang Qinwen Xu Daoyi(Ins.of Geo..CAGS) (Ins.of Geo.,State Seismological Bureu)Sun Yiyin Chai Zhifang(Ins.of Geo.Acadimia Sinica) (Ins.of highenergy physics,A.S.)Yan Zheng (Ins.of Geo.,State Seismological Bureu)  
Discoveries of catastrophic events cn stratigraphic columns indivdted by petro-graphical, minerological and geochemical changes at the P∈/∈, P/T, K/R and in same degree O/S,D/C and Q1/Q2. Stratigraphic boundaries were also witnessed, by writer. These, including the Ir anomaly, δ13C penetration, boundary clay,midrosph-erules mass extinction of organisms, distinctive exchange of sedimentary environments,etc.,are doubtless related to extraterrestrial catastrophic events.Thus,the extraterrestrial catastrophic events are the foundamental to geological history division.Here some new gaologcal terms as"boundary layer", "boundary clay layer", "boundary catastrophic event", "boundary catastrophic stage", "boundary catastrophic environment", "Meishucun catastrophic event", and anew theory of"Earth Ring" as dynamica of extraterrestrial events,are suggested and briefly explained in the paper,
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