supported by National Basic Research Program of China (Grant No. 2006CB80640);National Natural Science Foundation of China (Grant Nos. 40830212,40772022)
Six ichnogenera,Chondrites,Palaeophycus,Planolites,Rhizocorallium,Skolithos,and Thalassinoides,were identified from the drilling cores near the Global Stratotype Section and Point(GSSP) of Permian-Triassic boundary at...