Ppt Plate Tectonics Powerpoint Presentation Free Download Id 851309 Plate tectonics. feb 13, 2012 • download as ppt, pdf •. 77 likes • 79,583 views. ai enhanced description. k. kmacdevitt. follow. the document discusses plate tectonics and the structure and dynamics of the earth's interior. it describes how the crust is broken into plates that move atop the mantle due to convection currents, and the three. Alfred wegener german scientist noticed in the early 1900’s that some continents seemed to fit together as a puzzle wegener hypothesized that these continents were once a great land mass or supercontinent called pangea theory of plate tectonics earth’s plates are in constant, slow motion between 2.5 and 15 cm per year! explains how plates.
Ppt Theory Of Plate Tectonics Powerpoint Presentation Free Download Plate tectonics. 1. background of continental drift theory. up through the 1800’s, scientists believed that the locations of the continents had never changed. german scientist alfred wegener made observations that led him to disagree with this predominant theory. in 1912, a. wegener proposed a new hypothesis called continental drift. Trans hudson orogen: superior rae hearne continent continent collision, includes accretion of sask craton; elves chasm arc outboard of mojavia. source: whitmeyer, steven j., and karl e. karlstrom. "tectonic model for the proterozoic growth of north america." geosphere. 3, no. 4 (2007): 220 59. 22. 1.82 1.80 ga. Plate tectonics. plate tectonics is the theory that earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core. the plates act like a hard and rigid shell compared to earth's mantle. this strong outer layer is called the lithosphere. Plate tectonics is a theory that states that earth's litosphere has been in constant movement for billions of years via the tectonic plates, hence the confusion! this template has arrived to help you "shake up" the world of education. customize the slides, the diagrams, the exercises, the graphs, the text boxes, everything included to start.
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