Comparison of the electromagnetic structure of Archean cratons

Archean cratons contain the cryptic signatures of lithospheric formation processes dominant during the first half of<br>the Earth’s existence. One of the main debated topics in the geosciences is whether these tectonic processes are<br>similar to those occurring today, particularly plate tectonics, or whether other non-plate tectonic processes, such as<br>mantle plumes and sagduction, were more important.