Plate tectonics: When ancient continents collide
Nature Geoscience 10, 245 (2017). doi:10.1038/ngeo2918
Author: Clare Warren
The geological record preserves scant evidence for early plate tectonics. Analysis of eclogites — metamorphic rocks formed in subduction zones — in the Trans-Hudson mountain belt suggests modern-style subduction may have operated 1,800 million years ago.