The Theory of Pangaea
This theory was created by Alfred Wagner in 1915 . That theory is that once the continents were joined creating what Elferd called Pangaea. Wagner discovered this by using the shapes of the continents, plants, animal fossils, and the ancent ice age. There 3 plate tectonic boundaries they are divergent, convergent and transform. The reason for the plates moving is convection currents.
Divergent Boundary
A divergent boundary is when two or more plates slowly start drifting apart. Picture two giant conveyor belts slowly moving apart and as they move new ocean crust is formed.
Why are the continents dividing?
The continents are dividing because the sea floor is dividing and
it is pusing the continents apart. And with the sea floor spreding which is allowing magma to rise and with magma rising it is formaing valcanos. And the valconos are also pushing the continents apart.
Why are the continents dividing?
The continents are dividing because the sea floor is dividing and
it is pusing the continents apart. And with the sea floor spreding which is allowing magma to rise and with magma rising it is formaing valcanos. And the valconos are also pushing the continents apart.
Convergent Boundary
The continents are dividing because the sea floor is dividing and it is pusing the continents apart, with the sea is sperding which is allowing magma to rise and with magme rising it is formaing valcanos. The valconos are also pushing the continents apart. There are 3 types of convergent boundaries, continental to oceanic, oceanic to oceanic and continental to continental.
Oceanic to continental
When an oceanic plate collides with an continental plate. When they collide the oceanic gets subducted under the continental and this creates a trenches along the side of the continental plate.
Oceanic to Oceanic
When to plates collide and create a trench much like oceanic to continental. But these trenches are much deeper, for example the Mariana Trench it occurs where the Philippine plate and the Pacific plate collide and it's deeper then Mount Everest upside down.
Continental to Continental
When two continental plates collide, but don't get subducted. Instead the crust crumbles and brakes building up the rocks forming a mountain.
Oceanic to continental
When an oceanic plate collides with an continental plate. When they collide the oceanic gets subducted under the continental and this creates a trenches along the side of the continental plate.
Oceanic to Oceanic
When to plates collide and create a trench much like oceanic to continental. But these trenches are much deeper, for example the Mariana Trench it occurs where the Philippine plate and the Pacific plate collide and it's deeper then Mount Everest upside down.
Continental to Continental
When two continental plates collide, but don't get subducted. Instead the crust crumbles and brakes building up the rocks forming a mountain.
Transform Boundary
A transform bondary is when two plates hook on to one another and rub togethere creating friction. All the friction builds up and when the two plates brake apart it releses that friction and creates a earthquake.
This video is telling you more information on the Theory of Pangaea.