Beryllium production in early Galactic history

It is suggested that, if most star formation in the Galactic halo occurred in objects the size of globular clusters, then most of the spallation reactions producing beryllium could also have occurred in such objects, and that this could have led to the observed approximately linear relationship between beryllium and oxygen abundances. Furthermore, it is plausible that the relative spallation rates in the halo and the disc could lead to the beryllium-oxygen relationship observed at higher metallicities.