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Journal of Palaeogeography
Fig. 7 | Journal of Palaeogeography

Fig. 7

From: Demise of the Jabłonna Reef (Zechstein Limestone) and the onset of gypsum deposition (Wuchiapingian, west Poland): carbonate-to-evaporite transition in a saline giant

Fig. 7

Medium crystalline nonplanar unimodal dolomite with partly preserved primary fabrics (?boundstone–upper four images, bioclastic grainstone–lower four images). a, b, e, f transmitted light microphotographs (plane-polarized light and crossed polars, respectively), c, g cathodoluminescence (CL) images, d, h backscattered electron (BSE) images (dol–dolomite, anh–anhydrite; fine red dots mark spots of microprobe analyses). The anhedral dolomite crystals are usually few tens of micrometres in size and exhibiting undulatory extinction in crossed polarized light. The dolomite is red with some yellowish patches in CL. Primary porosity is plugged with anhydrite cements. Fine crystalline (dolomicritic) patches in the image A are encrusting foraminifers. Jabłonna 1 borehole, sample located 0.5 m below the top of the Zechstein Limestone

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