Historical Geology: a discipline that uses the principles and techniques of geology to reconstruct and understand the geological history of Earth. It also focuses on the evolution of plants and animals during different time periods in the geological timescale. Historical geologists may use their knowledge to reconstruct past landforms such as Pangea, a 'supercontinent' that existed during the Paleozoic and Mesozoic eras. These researchers might also look for evidence of past flooding in an area. However, historical geologists are best known for their work relating to fossils and dinosaurs.