Adlai Stevenson II. (2023, December 11). Wikiquote. Retrieved January 15, 2024 from https://en.wikiquote.org/w/index.php?title=Adlai_Stevenson_II&oldid=3417263.
It is believed that 43% of modern continental crust was formed in the Proterozoic, 39% formed in the Archean, and only 18% in the Phanerozoic.