Answer:
a Mid-ocean ridge
Explanation:
The middle of the Atlantic ocean is a divergent margin between two oceanic crusts.
As the crusts pulls apart, part of the asthenosphere wells up and forms magmatic bodies around the edges of the plate.
- This forms an extensive mountain ridge called the mid-oceanic ridge.
- It is one of the most prominent landmark on the earth crust.
- As the divergent margins moves apart, the mid oceanic ridge continues to grow.
- The ridge is basaltic in nature.
Core (The Hottest), Crust (The Coldest)
Scientists discovered that the rock that makes up the ocean floor lies in a pattern of magnetized Stripes. These 'stripes' hold a record of reversals in the Earth's magnetic field, as the rock is cooled, the iron bits line up in the direction of Earth's magnetic field.