Figure 2
Crystallographic orientation maps, with colour key indicating which crystallographic plane is normal to the plane of view, obtained by electron backscatter diffraction showing the orientation of calcite crystals, indicated by wire frames, in the anterior regions of dorsal valves of Novocrania anomala (top) and Terebratulina retusa (bottom). The uniformity of colour on 10 µm scales demonstrates that the sample is crystallographically non-random at the scales of the X-ray spot. |