Fig. 10. 3D in Aragonitic rostra of the Turonian belemnitid Goniocamax: Arguments from diagenesis

Fig. 10. 3D principal component plots based on the chemical compositions of the Recent and fossil shells. Axis 1 has high negative loadings corresponding to P, Fe, and Sr, with a positive Na loading. Axis 2 has high negative loadings corresponding to S, Ca, and Fe, and a positive Sr loading. Axis 3 has a high negative loading corresponding to Mg and a positive Sr loading. Recent and fossil calcites are separated according to axis 3, whereas Recent and fossil aragonites are separated according to axis 1.