What is plate tectonics?
Plate tectonics is the theory of several plates divided into section. These plates glide over the mantle and are hard and rigid. Mountains, volcanoes, and ocean trenches are caused by plate tectonics.
J Tuzo- Wilson and his contribution.
Wilson was a Canadian geologist who was intrigued by Wegener's theory. He had also known Hess at one point in the 30's. Wilson hypothesized that Hawaii and the ring of fire were made by a plate moving over a spot on the mantle causing all these volcanoes. Two years later, he proposed a third plate- movement called the transform boundary. This caused the San Andreas fault.
Transform, Convergent, and Divergent Boundaries.
A transform boundary is when one plate goes down, the other one up while grinding against each other. An example this is the San Andreas Fault. A convergent boundary is when two plates collide into each other. An example of this is the Washington- Oregon coastline. The divergent boundary is when two plates move away from each other. An example of this is the Mid-Atlantic Ridge.