The excursions of Sr isotope can support environment of paleomarine, and peloecology.Valueble data from important strata which limited by biostratigraphy in China, Iran and even Japan.

• 从而试图进一步揭示生物演化，特别是绝灭等生物事件与锶同位素，及与此相关的海平面变化和洋壳演化的可能联系。