1. Geological Institute; ETH Zurich; 8092; Zürich; Switzerland
2. Wellesley College; Department of Geosciences; Wellesley; MA; 02481; USA
3. Nagra, Nationale Genossenschaft für die Lagerung radioaktiver Abfälle; 5430; Wettingen; Switzerland
4. Institute of Geological Sciences; University of Bern; 3012; Bern; Switzerland