Fig. 1: Stratigraphic calcium and carbon isotope data from the Bottaccione section. | Communications Earth & Environment

Fig. 1: Stratigraphic calcium and carbon isotope data from the Bottaccione section.

From: Calcium isotope ratios of malformed foraminifera reveal biocalcification stress preceded Oceanic Anoxic Event 2

Fig. 1

Relative to stratigraphy of the Bottaccione section, a calcium isotope values (δ44/40Ca) of planktic foraminifera Rotalipora cushmani (red triangles), Whiteinella archaeocretacea (pink cross), and bulk carbonate (gray circles) where the error bars correspond to the analytical external reproducibility of ±0.05 (2σSD), and b carbon isotope values of carbonate (δ13Ccarb), including planktic foraminifera Rotalipora cushmani (blue triangles), Whiteinella archaeocretacea (blue cross), and bulk carbonate (gray circles). Oceanic Anoxic Event 2 is denoted by the positive δ13Corg excursion73 just below the black shale interval, here expressed at the Bonarelli Level. The last occurrence of R. cushmani is denoted by the downward pointing arrow. The open circles next to the stratigraphic column represent sample locations. LCI lower critical interval, ASW Atlantic Seawater; VPDB Vienna Peedee Belemnite.

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