The Iron Peak is a peak on the graph relating element
Abundances graphed to atomic number. The peak is centered
around Iron and shows high abundances of some
elements with similar atomic numbers.
The Iron Peak is theorized to result from the high
stability of the iron nucleus due to its high
Binding Energy and that nuclei
are synthesized by step-wise enlargement (i.e., the Alpha Process),
and iron's resulting stability allows fewer nuclei
to progress further to heavier elements.