This Query is part of the Worldbuilding Resources Article.
Creating a realistic world map - Erosion covered the various factors that govern the topography of a world. Rivers, wind, heat, and plants are some of the most important factors.
Underwater, though, things are different. At the bottom of the ocean, most of the important factors on land do not exist. Different processes must play a part in shaping the ocean floor.
- What processes are responsible for underwater mountains, valleys, and other features far from land? The focus here is on geography far out in the ocean, beyond the continental shelf.
This is part of a series of questions that tries to break down the process of creating a world from initial creation of the landmass through to erosion, weather patterns, biomes and every other related topics. Please restrict answers to this specific topic rather than branching on into other areas as other subjects will be covered by other questions.
These questions all assume an earth-like spherical world in orbit in the habitable band.
See the other questions in this series here : http://meta.worldbuilding.stackexchange.com/questions/2594/creating-a-realistic-world-series