CONTINENTAL SHELF
TOPOGRAPHY OF A SHELF RESEMBLES THE ADJACENT COASTAL PLAIN
WHERE MAJOR RIVERS EMPTY INTO THE OCEANS-RIVER VALLEY EXTENSIONS FORM CANYONS
WIDTH OF A SHELF IS DETERMINED BY ITS PROXIMITY TO A PLATE BOUNDARY
WIDEST SHELF OF COAST OFF SIBERIA WHERE THE TECTONICALLY INACTIVE ARCTIC SEA IS (800 MILES WIDE)