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jeremy murphy

pangea is the theory that explains how new ocean crust is formed at ocean ridges and destroyed at deep sea trenches
continental is the study of the history of earths magnetic feild
magnetometer greek word that means all earth
magnetic reversal a region where two plates slide horizontally past each other
paleomagnetism are huge peices of crust and rigid upper mantel that fit together at their edges to cover earths surface
isochron discovered continental drift
seafloor spreading is an imaginary line on a map that shows points that heave the same age that is they formed at the same time
tectonic plates the weight of a subducting plate pulls the trailing slab into subduction zone
divergant boundries regions where two tectonic plates are moving apart
rift valley happens when the flow in the outer core changes and earths magnetic field changes directions
covergent boundries  two tectonic plates are moving towards each other
subduction the weight of the uplifted ridge is thought to push the oceanic plate toward the trench formed at the subduction zone
transform boundry can not swim
ridge push which proposed that earths continents been joined as a single landmass tht broke apart
slab pull plant life
alfred wegner when two plats collide the denser plate eventually descends below the other less dense plate
cynognathus is a device that can detect small changes in magnetic feild
lystrosaurus when continental crust begains to seperate the stretched crust forms a long narrow depression
mesosaurus can not swim
glossopteris aquatic reptile

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