wrote her letters in a colloquial style / the broken syntax and casual enunciation of conversational English Similar: informal (used of spoken and written language)
Best Answer: The mid-oceanic ridge can be described as the longest mountain range. It includes the Mid-Atlantic ridge, and all other such ridges. They form a complete system that is 65000 km long. The Mariana's Trench is the deepest. It's 11.03 kilometres deep. I don't know how you define underwater mountain.
In the ocean, great underwater mountains are formed when plates spread away from one another, and melted rock pushes up through the gap, creating hot, buoyant elevations of new crust (a simplification of the process).this is how do mlountains form. The main process by which mountains form is through tectonic activity.