John Tuzo Wilson

A Canadian geophysicist who supplied two of plate tectonics' decisive arguments: that the age progression of the Hawaiian islands records a plate sliding over a fixed mantle hotspot, and that mid-ocean ridges are offset by a then-unrecognized kind of fault, the transform, whose predicted motion was soon confirmed by seismology. A late and vocal convert from fixed-continent thinking, he became one of the new theory's most effective champions. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/