widened margins
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.
A continental margin is the zone of transition between a continent and the deep ocean floor. It includes the continental shelf, continental slope, and continental rise. It is an area where sediments from the continent are deposited and tectonic activity can occur.
A subduction zone would be found at an active continental margin, where one tectonic plate is being forced beneath another. This process leads to features such as deep ocean trenches, volcanic arcs, and earthquakes. In contrast, passive continental margins lack these tectonic interactions and are characterized by a relatively smooth transition from continent to ocean basin.
The continental margins of the Pacific Ocean
The west Pacific Ocean earthquakes usually occur along the joins in the continental plates which lie offshore in most cases.
The east coast of South America along the Atlantic Ocean is a passive continental margin. This means that it is not located along a tectonic plate boundary where significant tectonic activity such as earthquakes or volcanic eruptions occur. The passive margin formed when South America separated from Africa during the opening of the South Atlantic Ocean.
Arctic ocean
pacific
in the pacific ocean because of the ring of fire (where a lot of active volcanoes are)
In the "Ring of Fire" on the Pacific Rim (a.k.a. Pacific Ocean)
The pacific ocean
it would be more likely to occur at convergent ocean-continental boundary beacuse the rocks are composed with a higher silica and has much thicker continental crust.