Plate Tectonics Questions Flashcards
Why was Wegener’s ideas about continental drift initially rejected?
He could not explain how the continents drifted apart
Wegener theory evidence
puzzle-like fit of land masses
Wegener theory evidence
plant and animal fossils found across oceans
Wegener theory evidence
glacial scars in warm weather areas
Wegener theory evidence
similar rock formations in Europe and US mountains
Hess’s theory of seafloor spreading
The rocks closest to the coasts are oldest
What land features are formed at the plate boundary Convergent CC?
mountain ranges
What land features are formed at the plate boundary Convergent OC?
trenches and volcanoes
What land features are formed at the plate boundary Convergent OO?
trenches, volcanoes, island arcs
What land features are formed at the plate boundary Transform?
fault lines
What land features are formed at the plate boundary Divergent?
rift valleys and oceanic ridges
Hess’s theory of seafloor spreading
ocean rocks closest to the mid-ocean ridge are youngest
Hess’s theory of seafloor spreading
magma pushed up through young rocks causes the seafloor to spread.
