Complex sentence: Relative to the age of our solar system (~ 4.57 Ga) this is a tiny age span, an age span where extreme climatic variations, super volcanoes or large meteorite impacts were absent.
Split into simpler sentences: Relative to the age of our solar system (~ 4.57 Ga) this is a tiny age span. An age span where extreme climatic variations, supervolcanoes or large meteorite impacts were absent.