Fig. 14

Contoured frequency plots of spiral height (δX) versus axial length (δY) for G. multicamerata (solid black lines) in keel view from 2.59 Ma to 7.96 Ma at Hole 925B. Gray contour diagrams are those of G. menardii (as shown in Fig. 12) for comparison reasons. Gray vertical lines at δX = 300 μm are for easier comparison of modal centers. For more explanations see caption for Fig. 12. Measurements of δX and δY from individuals can be taken from Table 4c in the electronic supplementary materials