1. HKU SPACE Community College, and Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong
2. Department of Earth and Planetary Sciences, University of California, Berkeley, California 94707, USA, and Osservatorio Geologico di Coldigioco, Contrada Coldigioco 62021, Apiro, Italy
3. G-O-Image LLC., 150 River Way, Lyons, Colorado 80540, USA
4. Dipartimento di Scienze Fisiche, della Terra e dell’Ambiente, Università di Siena, 53100 Siena, Italy