1. Departamento de Ciencias Ecológicas Facultad de Ciencias Universidad de Chile Las Palmeras 3425, Ñuñoa 7750000 Santiago Chile
2. Department of Earth Sciences University of Geneva Rue des Maraichers 13 1205 Geneva Switzerland
3. CICTERRA CONICET‐ Universidad Nacional de Córdoba Av. Vélez Sarsfield 1611 X5016GCA Córdoba Argentina
4. Institute of Geological Sciences Oeschger Centre for Climate Change Research University of Bern Baltzerstrasse 1+3 3012 Bern Switzerland
5. Laboratory of Ion Beam Physics ETH Zurich Otto‐Stern‐Weg 5 8093 Zurich Switzerland
6. Department F.A. Forel for Environmental and Aquatic Sciences and Institute for Environmental Sciences University of Geneva Uni Carl Vogt, Boulevard Carl‐Vogt 66 1205 Geneva Switzerland