Lec 2 Evolution Slides PDF

Evolution of the Ocean Basins Cite the major lines of evidence Wegener used to support his theory of continental drift. Explain why the theory of continental drift was not immediately accepted. Describe Harry Hess’ theory of seafloor spreading including the data that provided the basis for...

Evolution of the Ocean Basins Cite the major lines of evidence Wegener used to support his theory of continental drift. Explain why the theory of continental drift was not immediately accepted. Describe Harry Hess’ theory of seafloor spreading including the data that provided the basis for the idea. Discuss the role of technology in advancing our understanding of plate tectonics. 1 Scientific Discovery Image: Manatschal, Gianreto. (2023). GFT 2023 15 1 2. 2  Continental Drift Alfred Wegener in 1915 http://pubs.usgs.gov/gip/dynamic/wegener.html 3 Wegener’s Evidence: 2 - Similar Fossils 5 Wegener’s Evidence: 3 - Similar Rocks 6 Wegener’s Evidence: 4 - Surprising Geology Polar position Evidence of past glaciation Glacial debris in Tropics 7  Wegener’s Evidence: 4 - Surprising Geology Coal in Antarctica hotgates.stanford.edu:3455/SouthPole/839, http://www.geol.umd.edu/~kaufman/iceages.html 8 Ocean Exploration 9 Dating the Seafloor 10 11 Magnetic Patterns on the Seafloor http://pubs.usgs.gov/gip/dynamic/dynamic.html 14  Earthquakes and Wadati-Benioff Zones Based on data collected between 20s and 60s http://pubs.usgs.gov/gip/dynamic/dynamic.html https://seismo.berkeley.edu/blog/2015/05/30/it-doesn-t-get-deeper-than-that.html 15 Modern Plate Tectonics https://earthobservatory.nasa.gov/features/Tectonics & https://www.pbs.org/wgbh/aso/tryit/tectonics/intro.html 16