The Distinctive Sediments in the Early Triassic Recovery Time：“Anachronistic Facies

Key words: 
• Early Triassic

Abstract: After long term hotspot study about the endPermian mass extinction and relative catastrophic events, scientists recently focused on the aftermaths of mass extinction, such as ecosystems and sedimentary systems. The Early Triassic ecosystems immediately following the endPermian mass extinction were dominated by cosmopolitan members and opportunists, therefore, the importance of sediment records are obviously emerged, and "anachronistic facies" are becoming research foreland, such as flatpebble conglomerates, vermicular limestone, subtidal wrinkle structures, microbialite, carbonate seafloor fans, thinbedded limestone and zebra limestonemudstone. 
As the aftermaths of geologic transition, the appearance of "anachronistic facies" sediment immediately following the mass extinction and the elimination from normal shallow marine setting in the early Middle Triassic with the final establishment of the Mesozoic ecosystems in the Late Anisian. The dramatic synchronization between the changes of sedimentary systems and the radiation of the Mesozoic biotas further demonstrates that there were the inevitable interrelations among the sedimentary systems, ecosystems, mass extinction and recovery and specific environment. The study of the "anachronistic facies" sediment in an absence of fossils record Lower Triassic strata provide valuable materials and new angle of view to seek the endPermian mass extinction and recovery.