Acknowledgements
We gratefully acknowledge Prof. Robert Stern, Editor-in-Chief of International Geology Review, for his immense help and guidance during reviewing and editing stages. We would like to thank the many reviewers for their thorough and constructive reviews of the manuscripts in this special issue. Finally, we also thank the International Geology Review journal for providing us with the opportunity to publish this thematic issue.
Notes
1. Although intended for publication in this special issue, this article was earlier published in International Geology Review, v. 56, p. 1945–1963.