https://www.usgs.gov/publications/banded-iron-formations-late-proterozoic-age-central-eastern-desert-egypt-geology-and
In the central Eastern Desert of Egypt, deposits of iron-formation of the Algoma type occur as sharply defined stratigraphic units within layered volcanogenic...
banded iron formationslate proterozoicagecentral
https://www.usgs.gov/publications/evidence-proterozoic-and-late-cretaceous-early-tertiary-ore-forming-events-coeur
New 40 Ar/ 39 Ar age spectra on sericite and lead isotope data on tetrahedrite, siderite, galena, bournonite, and stibnite, together with previously published...
late cretaceousearly tertiaryevidenceproterozoicore