Plate Tectonics Carrie Armstrong, Erin Rickert, Lydia Nguyen, Emmy Penquite
Alfred Wegener German Scientist First to actively pursue the idea of a super-continent Also came up with the theory of continental drift Alfred Wegener
How he got started: The first clue Wegener had was the matching coast lines he said they were almost like pieces of a jigsaw puzzle Then noticed that other continents seemed to fit together to
Plate Tectonics
Includes the crust and the mantle Lithosphere outer part of the Earth Includes the crust and the mantle about 100 km thick lithosphere
The ductile part of the earth just below the lithosphere Asthenosphere The ductile part of the earth just below the lithosphere Includes the lower mantle Referred to as hot plastic About 180 km thick asthenosphere
Movement resembles ice drifting across a pond Tectonic Plates The tectonic plates glide over the asthenosphere at relates ranging from 1-16cm per year Movement resembles ice drifting across a pond
Continental Drift link The continents and ocean basins make up the upper parts of the plates As the plates glide the ocean and continents move with it link
Geological activity Most of this activity occurs at plate boundaries Three types of plate boundaries exist 1. divergent 2. convergent 3. transform