About the Authors

Sven Sachs

Sachs.Pal@gmx.de

Affiliation Engelskirchen, Germany

Jahn J. Hornung

Affiliation Geowissenschaftliches Zentrum, Georg-August-Universität, Göttingen, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Production of Fig. 1, Fig. 2, Fig. 5, Fig. 6 and Fig. S1: JJH. Production of Fig. 3 (A-D): SS. Production of Fig. 3 (E-G): JJH. Production of Fig. 4: SS. Conceived and designed the experiments: SS JJH. Performed the experiments: SS JJH. Analyzed the data: SS JJH. Contributed reagents/materials/analysis tools: SS JJH. Wrote the paper: SS JJH.