Plate Tectonics Questions
A volcanic arc is a curved chain of volcanoes that forms on the overriding plate in a subduction zone, where one tectonic plate is forced beneath another. These volcanic arcs are typically located on land and are associated with intense volcanic activity and the formation of mountain ranges.
On the other hand, a volcanic island is a landmass that is entirely composed of volcanic materials and is formed by volcanic eruptions on the ocean floor. These islands are usually found in the middle of tectonic plates, often associated with hotspots or mid-ocean ridges. Volcanic islands are surrounded by water and are not connected to any continental landmass.
In summary, the main difference between a volcanic arc and a volcanic island lies in their location and formation. Volcanic arcs are found on land and are formed in subduction zones, while volcanic islands are formed by volcanic activity on the ocean floor and are surrounded by water.