  In this work we apply a mathematical model of photosynthesis to quantify the
potential for photosynthetic life in the very Early Archean oceans. We assume
the presence of oceanic blockers of ultraviolet radiation, specifically ferrous
ions. For this scenario, our results suggest a potential for photosynthetic
life greater than or similar to that in later eras/eons, such as the Late
Archean and the current Phanerozoic eon.
