Ian Dalziel

Ian Dalziel is a Scottish-American geologist and geophysicist, born in 1937, research professor at the University of Texas at Austin own Institute for Geophysics after earlier posts at the University of Wisconsin and Columbia University, a pioneer of research into plate tectonics before the assembly of Pangaea and into the cycles by which supercontinents form and break apart. His extensive fieldwork in the southern Andes, the Scotia Arc, South Georgia and Antarctica produced evidence for the timing of the separation of South America from Antarctica and the opening of the Antarctic Circumpolar Current. He received the Murchison Medal in 1992, the Bownocker Medal in 1997, the Clough Medal in 2003 and the Polar Medal in 2023, and was named an Honorary Fellow of the Geological Society in 2005. He received the Penrose Medal in 2021.