Describe the geographic evidence collected in the latter part of the 20th century to support the theory of continental drift. Some of the geographical evidence collected in the latter part of the 20th century to support the theory of continental drift is the discovery of plate tectonics, Hess and Deitz modified the theory called "sea floor spreading". Along the seafloor features that supported the seafloor spreading hypothesis were: mid-ocean ridges, deep sea trenches, island arcs, geomagnetic patterns, and fault patterns. Ancient fossils found on different continents were often similar or identical, exploring naturalists discovered that the plants and animals living on different continents were often very different. new groups of animals and plants were discovered on almost every island and continent visited. Most biological species appeared to be unique to the region or continent in which they were found. These seemingly contradictory observations can be seen through plate tectonics. When different land masses were connected, the same or closely related plants and animals inhabited them. After the land masses separated, different species were geographically isolated from each other by ocean waters. Life on different continents evolved into different species because populations were separated from each other by great distances. It is possible to relate the fragmentation of continents to the types of animals found on each of them. The longer the period of separation, the more differences between species are seen because they have evolved. For example, all native mammals found in Australia are marsupials. There are no natural placental mammals. This suggests that there is paper in the middle of the lava and the whole process starts looping again and the tectonics continue to evolve. Works CitedTrefil, J. and Hazen, RM (2013). Science: an integrated approach, 7th edition (7th ed.). John Wiley and Sons. Retrieved February 2014Collins, GP (2009). TECTONIC PLATES. (cover story). Scientific American, 301(3), 100.http://eds.b.ebscohost.com.proxy.cecybrary.comhttp://www.encyclopedia.com/topic/continental_drift.aspxRichmond, Elliot. “Continental drift”. Animal sciences. 2002. Accessed March 13, 2014 from Encyclopedia.com: http://www.encyclopedia.com/doc/1G2-3400500081.htmlhttp://www.ucmp.berkeley.edu/geology/tecmech.htmlhttp://www. pbs.org/wnet/nature/episodes/the-himalayas/tectonic-motion-making-the-himalayas/6342/http://platetectonics.com/book/page_7.asphttp://platetectonics.com/book/page_14. asp