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Fig. 7 | Journal of Palaeogeography

Fig. 7

From: Early Triassic microbialites from the Changxing Region of Zhejiang Province, South China

Fig. 7

Thin-bedded micritic limestone interbedded with oncoidal limestone. a and b Micritic limestone contains several thin-shelled fossil fragments marked with yellow arrows (under plane polarized light); c Field photo of the intercalated oncoidal limestone that we interpret to have been transported from a shallow platform setting; d Thin section photomicrograph of oncoids. The structure of most of these oncoids has clearly been destroyed during diagenesis with concentric laminae relics preserved only around some of the oncoids (marked with yellow arrows)

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