Fig. 7

A Comparison between shale and concretion preservation. Taxa preserving one type of tissue (1 s); two, three, and four types of tissues (2 s, 3 s, and 4 s, respectively). The proportion of each tissue category [i.e., biominerals P(A); sclerite P(B); cuticle P(C); cellular sheets in direct contact with the surrounding environment P(D); and internal organs P(E)]. B Model explaining the differences between shales and concretions when carcass decay plays a major role in the fossilization process. C Model explaining the homogeneities between shales and concretions when decay is minimal