1 | University of Portsmouth, School of Earth and Environmental Sciences, Portsmouth, PO1 3QL,
United Kingdom |
2 | Kazan Federal University, 18 Kremlyovskaya St., Kazan 420008, Republic of Tatarstan, Russian Federation |
3 | University of the Witwatersrand, School of Geosciences and Evolutionary Studies Institute, Private Bag 3,
2050 Wits, South Africa |
4 | Consulting Geologist, Johannesburg, South Africa |