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Journal of Palaeogeography
Fig. 9 | Journal of Palaeogeography

Fig. 9

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. 9

Coarse crystalline calcite mosaic with numerous euhedral fluorite crystals. a, b transmitted light microphotographs (plane-polarized light and crossed polars, respectively); c CL image, d BSE image (cal – calcite, dol – dolomite, fl – fluorite, qtz – quartz; fine red dots mark spots of microprobe analyses). The clearer (inclusion-poor) crystals with distinct internal zonation pattern (orange in CL) are probably cements that occlude porosity within calcite mass composed cloudy (inclusion-rich) dull dark/nonluminescent in CL crystals. Scattered tiny crystals or irregular patches of dolomite (pinkish red in CL) occur within the calcite. Additionally, a euhedral quartz crystal is visible in the BSE image (d). Jabłonna 1 borehole, sample located 0.5 m below the top of the Zechstein Limestone

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