History of plate tectonics By Cynthiella Jun 14, 1912 Alfred Wegener came up with his theory that all the continents were together Feb 24, 1913 Wegener proposed that there was a land bridge connecting Africa with Brazil Jun 15, 1913 Wegener also found fossils in Europe and North America, and Madagascar and India. Oct 10, 1915 Wegener published a book "The Origin of Continents and Oceans" Jul 17, 1929 Wegener's ideas began to be dismissed Period: Dec 11, 1930 to May 15, 1958 Arthur Holmes began elaborating on Wegener's many hypothesis Apr 22, 1960 Holmes theories began getting attention Aug 3, 1961 Holmes' work led Harry Hess and R.Deitz to publish similar hypotheses based on mantle convection currents, now known as "sea floor spreading"
