Near an active continental margin

An active continental margin is characterized by tectonic activity, where an oceanic plate is subducting beneath a continental plate, leading to the formation of features such as deep-sea trenches, volcanic arcs, and earthquake zones. These margins are typically found along the edges of continents near tectonic plate boundaries, like the Pacific Ring of Fire. The geological processes at these margins often result in significant landform changes and can impact marine ecosystems. Examples include the coasts of California and Chile, where the interactions between tectonic plates are prominent.