1. Department of Earth Sciences, Section for Mineralogy, Petrology & Tectonics; Uppsala University; Villavägen 16 Uppsala Sweden
2. Instituto de Estudios Ambientales y Recursos Naturales (i-UNAT); University of Las Palmas de Gran Canaria (ULPGC); 35017 Las Palmas de Gran Canaria Spain
3. Department of Earth Sciences, Paleobiology; Uppsala University; Villavägen 16 Uppsala Sweden