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Understanding Pangaea and Plate Tectonics: Convergent, Divergent, and Transform Boundaries

This article explores the concept of Pangaea, the supercontinent proposed by Alfred Wegener about 300 million years ago, and its significance in the theory of plate tectonics. It discusses the different types of plate boundaries: convergent boundaries that cause earthquakes and volcanoes, divergent boundaries that create rift valleys, and transform boundaries exemplified by the San Andreas Fault. Real-world connections highlight seismic activity in Ohio and its geographical context within tectonic plate interactions. Learn about the fascinating dynamics of Earth's lithosphere and its historical implications.

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Understanding Pangaea and Plate Tectonics: Convergent, Divergent, and Transform Boundaries

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  1. History of Pangaea • Convergent Boundaries • Divergent Boundaries • Transform Boundaries • Real World Connections Plate Tectonics

  2. History of Pangaea • The theory of Pangaea meaning all lands,was developed by Alfred Wegener ( Super continent made up of all 7 continents about 300 million years ago). It was at first rejected because there was another theory at the time called “The Contraction Theory” and that was the world being a magma ball, cooling and folding in on itself. • He also did Paleontological things • Thermal convection was the ideas later associated. http://www.ucmp.berkeley.edu/geology/techist.html

  3. Alfred Wegener

  4. Convergent Boundaries A convergent boundaries is when two plates move towards each other and collide to make earth quakes or volcanoes. Others can be mountains and trench's by this. Such as the large North America plate and the small Juan de Fuca plate. http://vulcan.wr.usgs.gov/Glossary/PlateTectonics/description_plate_tectonics.html

  5. Volcano, Earth Quake, Mountains and Trench.

  6. Divergent Boundaries • A divergent boundaries is when 2 plates move away from each other and can from rifts or rift valleys. • Plates from Eurasian and African plates example this. http://vulcan.wr.usgs.gov/Glossary/PlateTectonics/description_plate_tectonics.html

  7. Transform Boundaries • A transform boundary is when a plate horizontally slides past another plate. • It can cause and earth quake mostly. • San Andreas fault zone of California witch is boundary of pacific and N.A Plates. Is an example of this. • These can also sometimes make mudslides or land slides. http://vulcan.wr.usgs.gov/Glossary/PlateTectonics/description_plate_tectonics.html

  8. Land and Mud slides

  9. Real World Connections • In Cincinnati we live on the North America plate. • We are bordered by the Pacific and Juan De Fuca plate. • There has been 200 earth quakes in Ohio since1776 but with no injuries or damage. 15 however have had a little damage and some small injuries. • Ohio is on the periphery of the New Madrid Seismic Zone largest sequence of earth quakes in 1811-1812 of 4 earth quakes. http://www.dnr.state.oh.us/geosurvey/html/geo_f03/tabid/8307/Default.aspx

  10. THE END! Will Schweitzer

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