Fig. 3From: Plio-Pleistocene landscape evolution in Northern SwitzerlandGlobal marine oxygen isotope record of the last 3.5 myr (modified after Lisiecki and Raymo 2005 and adapted to Gradstein et al. 2012) and the tentative age assignments of the HDS, the TDS, and the Upper and Lower Terrace deposits of northern Switzerland, as discussed in the textBack to article page