Figure 3.

EBSD analysis of mussel shells grown under (a) present day (380 μatm pCO₂) and (b) OA (1000 μatm pCO₂) conditions. Images present a cross section of the shell from outer calcite (upper area) to the inner aragonite (lower area) for a, (i) diffraction intensity map (DI), (ii) crystallographic orientation map (orientation) according to colour key, [0001] plots are for calcite and [001] plots are for aragonite., (iii) phase map where calcite is shown in red and aragonite in green. Inverse pole figures (IPF) on the right correspond to the crystallographic orientation maps in (ii) using the IPF colour key to indicate strength of CPO or texture. The growth direction of the shells are from left to right in the sections and the IPFs are plotted normal to that view.