Glossary of "Evolution of Plants (2nd ed.)" by Willis & McElwain (2014)
- A hypothesis put forward to account for various features of the Earth's surface, e.g. the distribution of the continents and ocean basins.
Glossary of "Environmental Science: Earth as a Living Planet (2nd ed.)" by Botkin & Keller (1998)
- The movement of continents in response to seafloor spreading. The most recent episode of continental drift supposedly started about 200 million years ago with the breakup of the supercontintnt Pangaea.
- Botkin, D. B. & Keller, E. A. 1998. Environmental Science: Earth as a Living Planet, 2nd ed. -xxxxii + 649 pp. John Wiley & Sons, Inc., New York.
- Willis, K. J. & McElwain, J. C. 2014. The Evolution of Plants, 2nd ed. -ix + 398 pp. Oxford University Press, Oxford.