ARENIG TRILOBITE ASSOCIATIONS OF DAPING, YICHANG, HUBEI, SOUTH CHINA

Stratigraphical ranges of 30 trilobite species are recorded from the Ordovician Dawan Formation (Arenig) at Daping, Yichang, Hubei Province, China. Three trilobite associations are differentiated with respect to palaeobathymetrical and sedimentological gradients: the Asaphid Pseudocalymene Association, the Asaphid Raphiophorid Association and the Trinucleid Association. Stratigraphical occurrence of these associations within the formation reflects transgressive and regressive phases within the Arenig Series. This provides the first information on trilobite biofacies relationships across the Dawan Formation in the Yangtze Block.

Project Supported:

Clc Number:

Q915.811 Q915.72