Fig. 3: Crystallographic signatures of dendritic branching in olivines from West Greenland picrites.

a Electron backscatter diffraction (EBSD) maps colored using the inverse pole figure (IPF) key as in Fig. 2, with the mean orientation of the grain containing the red dot set to white. To emphasize the larger range of misorientation in dendrite branches compared with the distorted olivines in Fig. 2, the IPF color key is adjusted so that pixels with misorientation angles >20° are colored black. 3D olivine crystals are overlain to allow visualization of the orientation of the dendritic olivines with respect to the three crystallographic directions of olivine. b Weighted Burgers vector directions (WBVDs) overlain on band contrast maps ([100] = green, [010] = blue, [001] = red]). Scale for both images shown on EBSD map. c Misorientation axes for 125 dendritic buds from West Greenland picrites (misorientation angle >1°). The color scale has units of “multiples of uniform distribution”. d Histogram of misorientation angles between adjacent dendrite buds. Seventy percent of dendritic buds are misoriented from the host crystal by >5° (see ref. ³⁴).