Figure 3
Stratigraphic data from the Molasse basin.
(a) Stratigraphic development of the Napf megafan together with magnetostratigraphic calibration of the section8, accumulation rates of non-decompacted sediments, evolution of maximum clast sizes28 and evolution of relative abundance of crystalline clasts29. This section records the progradation of the Napf megafan (Fig. 1a). (b) Data from the Rigi fan, showing magnetostratigraphic calibration of the section9, sediment accumulation rates of non-decompacted material, development of maximum clast sizes plus first arrival of crystalline clasts25. (c) Data from the Hörnli megafan, including: stratigraphic architecture and chronological calibration of the section7, evolution of largest clasts30, sediment accumulation rates7 and relative abundance of crystalline clasts in the Hörnli megafan deposits26,30 (Fig. 1a). See Fig. 2d for palaeogeographic sketch and color codes for environments.
