Collins, James A; Govin, Aline; Mulitza, Stefan; Heslop, David; Zabel, Matthias; Hartmann, Jens; Röhl, Ursula; Wefer, Gerold (2013): (Fig. 1c) Dust content of surface sediments. PANGAEA, https://doi.org/10.1594/PANGAEA.820374, In supplement to: Collins, JA et al. (2013): Abrupt shifts of the Sahara–Sahel boundary during Heinrich stadials. Climate of the Past, 9(3), 1181-1191, https://doi.org/10.5194/cp-9-1181-2013