he worked on the theory of tectonic plates
Antonio Snider-Pellegrini(1802-1885)
In 1858, Snider-Pellegrini proposed that all of the continents were once connected together during the Pennsylvanian Period. He based this theory on the fact that he had found plant fossils in both Europe and the United States that were identical.
more info
http://en.wikipedia.org/wiki/Alexander_Du_Toit