Plate Tectonics
Conversent Boundaries
The Mariana Trench is the deepest trench
The deepest point is the Challenger Deep at 11,034 m (6.1 miles)
1,580 miles long, alongside the Mariana Islands
Indo -Australian and Pacific plates are colliding
Divergent Boundaries
Two plates moving away from each other allows Magma to push through
the cryt and form new cryst
In the ocean its called sea floor spreading
The new rock builds up and forms underwater mantain (anges called
Mid -ocean ridges
Volcanoes and hydrothermal vents are located all along the ridge
The Mid -Atlantic Ridge and the seafloor of the Atlantic Ocean provide
strong evidence Supporting the theory of plate tectonics
-It runs directly down the center of the Atlantic
- Rocks at equal distances from the rige are the same age
-Sediment buildup gets thicker the further from the ridge
- Seismic activity is frequent
- Paleomagnetic stripes Match on both sides
- In Iceland, the Mid -Atlantic Ridge can be seen above sea level
