Fig. 1: Study area and localities of the lake cores.
From: Early warning signals of the termination of the African Humid Period(s)
a Map of northeastern Africa and adjacent areas showing the Ethiopian Plateau (in gray), the Ethiopian rift (marked with thin black lines), the Chew Bahir basin (4°45'40.55''N 36°46'0.85''E, ~500 m above sea level) and the river Nile with its two tributaries. Coastline and river polygons from the Global Self-consistent, Hierarchical, High-resolution Geography Database (GSHHG)68. Topography from the 1 arc-minute global relief model of the Earth’s surface (ETOPO1)69. b Geological map of the Chew Bahir basin, showing the four generalized rock types: Quaternary rift sediments, Neogene and Paleogene rift volcanics, and Paleozoic–Proterozoic basement, and the location of the short cores CB01–06, the intermediate core CHB14-1 and the long cores CHB14-2A and 2B. Compilation based on Omo River Project Map41, Geological map of the Sabarei Area70, Geological map of the Yabello Area71, and Geological map of the Agere Maryam Area72.
