Mary L. Droser, James G. Gehling, Sören Jensen; When the worm turned: Concordance of Early Cambrian ichnofabric and trace-fossil record in siliciclastic rocks of South Australia. Geology ; 27 (7): 625–628. doi: https://doi.org/10.1130/0091-7613(1999)027<0625:WTWTCO>2.3.CO;2
Download citation file:
Studies of sedimentary fabrics and trace fossils across the Precambrian-Cambrian interval in South Australia demonstrate that the appearance of Treptichnus pedum, which defines the base of the Cambrian, also marks the initial development of preservable infaunal activity. There is a significant shift in the amount and nature of bioturbation at this time. These results support the broad-scale utility of T. pedum as the indicator of the base of the Cambrian.