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Fig. 9 | Journal of Palaeogeography

Fig. 9

From: Manganese carbonate stromatolites of the Ediacaran Doushantuo Formation in Chengkou, northern Yangtze Craton, China

Fig. 9

Macro- and microscopic characteristics of the stratiform-columnar stromatolites. a Vertical view of a cut slab of stratiform-columnar stromatolites that were formed by the laterally linked laminae of columnar stromatolites; sample ZK05-b17; b Vertical section of stratiform-columnar stromatolites in which the laminae are steeply arched and laterally linked; there are clotted and tubular microstructures in the arched laminae, which may be related to microbial activities; sample ZK01-b11; c Vertical section of stratiform-columnar stromatolites, which were formed by the locally upward arching of the laminae; while the pillared laminae consist of micro-branched stromatolites and dendrolites; sample ZK01-b18; d Alveolar laminar textures in stratiform-columnar stromatolites, which are composed of clots; sample ZK01-b11

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