Fig. 9

The reworking process of Thalassinoides producers from the Zhushadong Formation in the Guankou section (modified from Qi et al. 2014). a Thalassinoides producers were burrowing in sediments; b When the sedimentation rate increased, Thalassinoides producers were forced to stop burrowing; c With decrease of the sedimentation rate, Thalassinoides producers began burrowing again, forming next bioturbation layer