FRESHWATER LIMESTONE IN AN ARID RIFT BASIN: A GOLDILOCKS EFFECT GAIL M. ASHLEY,1 CAROL B. DE WET,2 MANUEL DOMI´NGUEZRODRIGO,3 ALYSSA M. KARIS,1 THERESA M. O ... Inset shows the location of the Olduvai Gorge in East Africa. The map is a paleogeographic reconstruction of the Olduvai Basin during Bed I and Bed II time showing interpreted flow ...