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Earth Science Who knew it was so controversial… The trouble with studying the Earth… …no one was around when it started. Alfred Wegener (Veg-a-ner) 1906 - 1931 Wegener was from Germany and was part of 3 different two-year expeditions to map and take weather data on Greenland. In Alfred’s free time… …he wondered if the Earth’s continents could have been in different places throughout history. He noticed… the edges matched up. http://publish.illinois.edu/platetectonics/files/2014/12/africa.jpg Tropical fossils… not in the tropics Freshwater and non-swimming reptile fossils on different continents. http://3.bp.blogspot.com/_oi4xnSVq6gE/TLbCfeZhkrI/AAAAAAAAAAY/6Fi2I7grszE/s1600/fossil+distribution.png Glaciers left sediment and grooves on ground. http://img.geocaching.com/user/eef58236-8ae5-4b13-8f06-00e489613fe0.jpg http://www.thisoldearth.net/Images/glacial_striations.jpg http://www.earthonlinemedia.com/ebooks/tpe_3e/tectonics_landforms/glacplt2.gif Mountain ranges match up http://thebritishgeographer.weebly.com/uploads/1/1/8/1/11812015/9738162_orig.png WHY might this happen? Other scientists rejected Wegener’s ideas because he had some wild ideas about why it happened and he was NOT a real geologist. Wegener thought Earth’s spinning and tides pulling moved the continents. Wegener died in Greenland in 1930. Almost 40 years later, Harry Hess helped prove Wegener was correct. Let’s review Wegener’s evidence 1 Continent shapes 2 Fossils -plant and animal fossils on continents separated by oceans 3 Climate - tropical plants and animals on Antarctica 4 Glacial deposits 5 Matching rock structures and mountains