University of California
University of California, Santa Barbara/abyssal Hills
This article, published in Nature magazine, gives a detailed account of the abyssal plain feature called abyssal hills.
Other
Whitman College: Deep Sea Pages
Descriptions and pictures of creatures that live at abyssal depths and on the abyssal plains of the world ocean. Link to other sites.
The Wild Classroom
The Wild Classroom: Biomes of the World: The Deep Sea Biome
Learn all about the abyssal ocean ecosystem. Find out about plants, animals, adaptations, and conservation efforts.
University of California
Ucmp: Glossary of Natural History
A glossary of useful terms, including "abyssal plain" and related terms.
NOAA
Noaa: Submersibles
Learn more about the technology that's involved in oceanography. This resource contains descriptions and pictures of thirteen different submersibles and remotely operated vehicles.
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.