Materials include stratigraphic samples from William R. Riedel and Annika Sanfilippo (radiolarian biostratigraphy), M. N. Bramlette (nanofossil stratigraphy), Fred Phleger/Frances Parker (foraminifer ...
Paleoclimate and archaeological evidence tells us that, 11,000-5,000 years ago, the Earth's slow orbital 'wobble' transformed today's Sahara desert to a land covered with vegetation and lakes.