<P> A continental shelf is a portion of a continent that is submerged under 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> A continental shelf is a portion of a continent that is submerged under an area of relatively shallow water known as a shelf sea . Much of the shelves were exposed during glacial periods and interglacial periods . </P>
shallow water zone of intertidal area on the continental shelf is called as
shallow water zone of intertidal area on the continental shelf is called as
shelf sea
shelf sea