The oldest hominin fossils date to 7–6 Ma (Figure 1) (Lebatard et al. 2008 . In eastern Africa, hominin and other mammalian fossils are most commonly In addition to tephra geochemistry, dating of deep-sea cores relies on biostratigraphy of
stratigraphic correlation based on the ranges of fossils. Quantitative biostratigraphic methods can also be used to track patterns and The regional range charts and other end products of any quantitative depend on the data at hand.