Figure 4

The strongly increased co-orientation strength of aragonite in A. gorgonophila, D. sarsii, and S. margaritacea individual sclerites. We show, for individual sclerites (given on the left), aragonite crystallographic axes orientation with pole figures. Each pole figure shows several hundred crystal orientation data points (figures given on the right-hand side of the pole figure). As these have similar orientation, the data points fall on top of each other. MUD multiple of uniform distribution. MUD values are very close to or, even, slightly above 700 and indicate the single-crystallinity of an individual sclerite.