US Geological Survey
Usgs: Pacific Seafloor Mapping Project
This site describes the details of a project to map the seafloor of the Pacific Ocean. Includes images, movies, links to related information, and more.
University of California
Mid Ocean Ridge
An article from Scientific American details some recent discoveries about the ridge systems. "New maps reveal striking details of how segments of the Ridge form and evolve."
Extreme Science
Extreme Science: Challenger Deep
A short description of the world's deepest ocean trench. Includes diagram and map.
US Geological Survey
Usgs: Bathymetry of the Marshall Islands
This map details the area around the Marshall Island seamounts. Seamounts are one of many features that are found in conjunction with abyssal plains.