In The Trenches
Long, narrow depressions that make up the deepest part of the ocean floor.
What are trenches?
Also called a rift in a mid-ocean ridge.
What is a valley?
The point of contact between oceanic plate and continental plate.
What are subduction zones?
Underwater mountain ridges that have a valley running down their spine.
What are mid-ocean ridges?
The movement of plates away from ridges and towards subduction zones.
What is how do trenches form?
The force of the magma pushes on the ridge.
What is Ridge-push?
The deepest trench to be measured is almost 6.8 miles deep.
What is the Mariana Trench?
When a plate is pulled by subduction at the edge of the plate opposite to the ridge.
What is Slab-pull?
When two plates continually moving toward each other become stuck and then break under pressure.
What is a Megathrust earthquake?
The longest mountain range is 6,200 miles long and 2 miles high.
What is the Mid-Atlantic range?