List 4 facts that characterize the oceanic ridge

1-Longest topographic feature on earth's surface.

2-Represents 20% of earth's surface and winds through all major ocean basins like the seam on a baseball.

3-Not narrow, but has widths that vary from 1,000 to 4,000km.

4-Along the axis of some ridge segments is a deep down-faulted structure called a rift valley.