Seamounts:
* Submerged volcanoes: They are underwater mountains, rising from the ocean floor but not reaching the surface.
* Don't break the surface: They don't form islands.
* Variety of sizes: Can range from small, isolated cones to massive underwater plateaus.
* Common occurrence: Very common, particularly along mid-ocean ridges where tectonic plates are spreading apart.
Volcanic islands:
* Emerged volcanoes: They are volcanoes that have erupted and risen above sea level, forming landmasses.
* Break the surface: They are islands.
* Often associated with hotspots: Many form over hot spots, where magma plumes rise from deep within the Earth's mantle.
* Less common than seamounts: Only a small percentage of volcanoes reach the surface to become islands.
Relationship:
* Seamounts can become volcanic islands: If a seamount continues to erupt and grow tall enough, it can eventually break through the ocean surface and become an island.
* Islands can be eroded or submerged: Over time, volcanic islands can be eroded by waves and currents, or they can sink back below sea level as tectonic plates move.
In essence, a seamount can be considered a potential volcanic island, while a volcanic island is a seamount that has reached the surface of the ocean.
