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Fig. 6 | Progress in Earth and Planetary Science

Fig. 6

From: Litho-, bio-, and chemostratigraphy of the Middle Triassic carbonate succession in the North-Central Coast Region of Vietnam

Fig. 6

Composite lithostratigraphy and carbon isotope stratigraphy of bulk carbonate samples from this study (cores no. 1 and 4). The δ13C values presented are those of samples that are not diagenetically altered, as inferred from trace element (Mn and Sr) criteria as defined in the subsection “Isotope and minor element profiles” of the main text. Using these criteria, 67 samples were removed from consideration (Additional file 1: Table S1 and Additional file 2: Table S2). The marked decrease observed in the δ13C profile in the upper interval (uppermost unit 5 and unit 6; shown in gray) is likely due to diagenetic overprinting (meteoric diagenesis). For the definition of the pink and blue areas and abbreviations, see the Fig. 2 caption

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