The students have been learning more about the geology of the Turkana Basin. Today they learned about how layers of sediment form (stratigraphy) and what these layers can tell us about the nature of past environments. Sediments are particularly useful in telling us about the topography (profile) of landscapes and the presence of rivers, lakes or oceans. In an outcrop at the Turkwel cliffs, down river from the TBI campus, students could observe the different layers of sediment that had formed over the past 200,000 years. Students also measured river depth, width, water speed, and collected sediment samples to compare it to the up river TBI location.