block m (great hammerhead). The D-period arcs for this set of position were present but difficult to observe. Frame 868 shows one of the more prominent D-period peaks. Note that the overall intensity is not insignificant but is concentrated in the halo which is wider azimuthally than for other blocks.
Park, J. S. (Creator), Almer, J. D. (Creator), James, K. C. (Creator), Natanson, L. J. (Creator), Stock, S. R. (Creator) (2022). Supplemental Video 4 from Bioapatite in shark centra studied by wide-angle and by small-angle X-ray scattering. The Royal Society. 10.6084/m9.figshare.21068311.v1