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Journal of Palaeogeography
Fig. 8 | Journal of Palaeogeography

Fig. 8

From: Sedimentary characteristics of microbialites influenced by volcanic eruption: a case study from the Lower Cretaceous Shipu Group in Zhejiang Province, East China

Fig. 8

a Meso-photo of a hand specimen from the top of a reef showing that the upper part is tuffite, and the lower part is stromatolite (limestone) which contains bright layers and dark layers. Finger of 1.5 cm wide in the lower left corner for scale; b Photomicrograph of stromatolite (limestone) from the dark layer (red rectangle in a) showing its accretion in a fan-shaped growth pattern (see c). 5×, plane-polarized light; d FESEM image of a freshly broken chip from a darker layer showing calcite (C) crystals, clay minerals (CM) and suspected microbes (red rectangle); e Suspected microbes are highlighted in details; the host is a calcite (C) crystal

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