In the new study, Dr. David Hernández Uribe from the University of Illinois Chicago used computer models to study the formation of magmas thought to hold clues to the origin of Earth’s continents. Hadean Earth. Image credit: Alec Brenner. Magma is the molten substance that, when it cools, forms rocks and minerals. Dr. Hernández Uribe looked for magmas that match the compositional signature of rare mineral deposits called zircons that date back...