Gerhard, Baron De Geer

Gerhard, Baron De Geer (born October 2, 1858, Stockholm, Sweden—died July 23, 1943, Saltsjöbaden) was a Swedish geologist, originator of the varve-counting method used in geochronology. De Geer was appointed to the Swedish Geological Survey in 1878 and received a master’s degree in geology from Uppsala University in 1879. He studied the glaciers of Spitsbergen in a series of expeditions. He became a professor at the University of Stockholm in 1897, serving as president from...