1. Department of Earth Sciences and Physics of Condensed Matter, Faculty of Sciences, University of Cantabria, Avenida de los Castros s/n, 39007 Santander, Spain
2. Geology Department, Facultad de Ciencias, University of Salamanca, Plaza de la Merced s/n, 37008 Salamanca, Spain
3. Geology and Geography Department, Tomsk State University, Lenin Street 36, Tomsk 634050, Russian Federation
4. Department of Earth Sciences, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, Netherlands
5. Department of Geosciences, University of Oslo, P.O. Box 1047 Blindern, N-0316 Oslo, Norway
6. Departamento de Geodinámica, Estratigrafía y Paleontología, and Institute of Geosciences (IGEO CSIC-UCM), Universidad Complutense de Madrid, c/ José Antonio Novais, no. 12, 28040 Madrid, Spain