1. Department of Earth Sciences; University of Cambridge; Downing Street Cambridge CB2 3EQ UK
2. Emmanuel College; University of Cambridge; St Andrews Street Cambridge CB2 3AP UK
3. Laboratoire de Géologie de Lyon: Terre, Planètes, Environnement (UMR 5276 CNRS); Université Claude Bernard Lyon 1; 2 rue Raphaël Dubois 69622 Villeurbanne France
4. Back to the Past Museum; Carretera Cancún; Puerto Morelos Quintana Roo 77580 México