The images in this slide show are all from the Pacific Ocean, but the point applies every where: when it goes overboard, or downriver, this is where it winds up.
Some of the locations of the photos:
Monterey Canyon, off the coast of California
http://sanctuarysimon.org/monterey/images/build/sc_overview_map_full.jpg
info here: http://sanctuarysimon.org/monterey/sections/submarineCanyons/overview.php
Davidson Seamount:
http://oceanexplorer.noaa.gov/explorations/02davidson/background/missionplan/media/locatormap.html
Axial Seamount:
a seismically active underwater volcano at the edge of the Juan de Fuca plate (remember the tectonic plates? this is the smallest and it's sliding underneath the North american plate.) This is the area I visited as a teacher at sea some years back...
http://www.pmel.noaa.gov/vents/axial98/axial98.html
More about submarine volcanoes here: http://www.ooi.washington.edu/story/Axial+Seamount These folks know their stuff. Axial photo here: http://www.volcano.si.edu/volcano.cfm?vn=331021
And a 2011 eruption at Axial: http://www.youtube.com/watch?v=SY8Cx9rLiY4 Folks in Seattle are up on this stuff.
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