Is it possible that a pair of linked nS Ns tori prolapsed from this Fe + O crenelated sphere resulting in the spewing forth of Electro-Nuclear Regenerated Carbon, Oxygen, Sulfur (and other nuclei)?
Both the substrate, known to be mostly Zinc Oxide with a little Copper Oxide and the Fe + O crenelated ball appear to be lighter than the 'tori' pair, which in turn are lighter than the known mostly Carbon streamer. Sadly, spot sampling was not done on the discs in this session. However, the detector is set to full Back Scatter mode, and the tori have been determined in all cases so far to be made mostly of Ca and O, in which case the luminosity data being between C and Fe is supportive of it being Calcium.
If this is the confirmed in a further SEM/EDS session, then this may be the moment a nS Ns tori pair was ejected from the crenelated Fe + O spherical cluster.