US Geological Survey
Usgs: u.s. Atlantic Continental Margin Gloria Mapping Program
This site from the U.S. Geological Survey allows you to access detailed images of the continental margin around the United States. There is additional information about the sonar methods used, and a wealth of additional sources listed.
US Geological Survey
Usgs: Monterey Submarine Canyon, California Moored Array Data Report [Pdf]
This advanced site discusses some of the research done and research techniques used in studies of the Monterey Canyon. Great graphics showing the position of the canyon relative to other features of the continental margin. Also...