Earth And Plate Tecronics Flashcards
What is the thickest layer
Outer core
What is the composition of the outer and inner core
Iron with the some nickel
What is the composition of the mantle and asthenosphere
Magnesium and iron silicates
Who proposed the theory of continental drift
Alfred Wagner
Early 1900s
What are some evidence for the continental drift
Puzzle pieces, geographic features, fossils, rocks, glacial striations, Mountain belts
What was wrong with the theory of continental drift
Wegner could not explain how the continents moved
Who created The Theory of the sea floor spreading
Harry Hess in 1960
What was evidence of seafloor spreading
Mid ocean ridge, paleomagnetic patterns
Who came up with the theory of plate tectonics
J. Tuzo Wilson
1964
List the layers of earths surface
Inner core, outer core, mantle, asthenosphere, lithosphere/crust