Gulfs are found around the edges of oceans. They are usually formed by movements of tectonic plates under Earth's crust.
Deep ocean trenches can be formed by undersea earthquakes, land-slides, but also by the movement along the edges of tectonic plates.
Deep ocean trenches are deep slits in the middle of the ocean. The pressure inside these trenches is unbearable. long, curved valleys along the edges of the ocean basin
Stones on Earth exist in two sorts of areas - on the sea shores of different seas and oceans, and inland where old oceans used to cover the land. Then, at that point, when the oceans withdrew, the stones became landlocked.
Most earthquakes and volcanic eruptions happen along the edges of the plates.
edges
Usually not, but it can.
Usually.
Usually none.
sebaceous glands
the vertice's in a rectangular prism are located wherever two edges meet.
Usually 3 of them