Subduction. A subduction trench.
The U.S. east coast is not considered an active continental margin because there are no plate boundaries near it. Off the coast there is merely a slope with a transition from continental to oceanic crust.
Yes
An active continental margin may have a trench.
On an active continental margin, you would be likely to find an active ocean trench. This structure would generally not occur at a passive continental margin.
Passive continental margin.
On an active continental margin, you would be likely to find an active ocean trench. This structure would generally not occur at a passive continental margin.
Subduction. A subduction trench.
No. There is no such thing as a passive plate edge. They are near a passive continental margin.
Subduction. A subduction trench.
active continental margin
active continental margin