The igneous rocks comprising the Mackenzie Large Igneous Province originated from processes not associated with normal plate tectonics and seafloor spreading .
The Mackenzie Large Igneous Province was caused by processes other than normal plate tectonics and seafloor spreading .
Mantell 's work on the structure and life of `` Iguanodon '' began the scientific study of dinosaurs . In 1822 he was responsible for the discovery ( and the eventual identification ) of the first fossil teeth , and later much of the skeleton , of `` Iguanodon '' .