<P> The continental shelf is an underwater landmass which extends from a continent , resulting in an area of relatively shallow water known as a shelf sea . Much of the shelves were exposed during glacial periods and interglacial periods . </P>
<P> The continental shelf is an underwater landmass which extends from a continent , resulting in an area of relatively shallow water known as a shelf sea . Much of the shelves were exposed during glacial periods and interglacial periods . </P>
the shallow region of the ocean that occurs above the continental shelf
the shallow region of the ocean that occurs above the continental shelf
shelf sea
shelf sea