Lake-level changes and hominin occupations in the arid Turkana Basin during volcanic closure of the Omo River outflows to the Indian Ocean – Response to comments by Schuster and Nutz, Quaternary Research 92(2), pp. 598–600. Issue 2 (September 2019) - Boës, Xavier; Prat, Sandrine; Arrighi, Vincent; Feibel, Craig; Haileab, Bereket; Lewis, Jason; Harmand, Sonia