The convention allows such claims where undersea features are contiguous with a country's coastal shelf.

It deepens like a coastal shelf.

The town centre and major industrial areas sit on a fairly flat coastal shelf, with a gentle incline leading away from the coast.

This collapse involved an estimated 290km mi length of coastal shelf, with a total volume of 3500km3 cumi of debris.

After surviving a storm, they find themselves on a coastal shelf of an island inhabited by a mysterious group of people.