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Theory of plate tectonics

Teacher: nayeli
Across
Process of shearing that forms faults
Developed early theories of continental drift
Moved by convection currents
how many boundaries is there?
something that the convergent boundary builds
Down
Forms mid-ocean ridges and rift valleys
the second type of convergent boundary
Forms trenches, island arcy,and mountains
the hypothetical landmass that existed when all continents were joined, from about 300 to 200 million years ago
the amount of plates that slide over eachother on transform boundary