1. Mid-Ocean Ridges: This is the most common location for divergent boundaries. Here, the process occurs on the ocean floor.
* Existing Ocean Crust: Divergent boundaries can form within existing oceanic crust, leading to the creation of new ocean basins. This is the classic example of seafloor spreading, where magma rises from the mantle to create new oceanic crust.
* Continental Shelves: In some cases, divergent boundaries can develop along the edge of continental shelves, causing them to rift apart and eventually separate.
2. Continental Rifts: These occur on land, and they are responsible for the formation of new ocean basins over time.
* Existing Continents: Divergent boundaries within continental crust lead to the formation of rift valleys. These are characterized by volcanic activity, earthquakes, and the creation of a series of valleys and mountains as the landmass pulls apart.
* Continental Shelves: Occasionally, divergent boundaries can initiate on continental shelves, causing them to break apart and form rift valleys that eventually develop into ocean basins.
Examples:
* Mid-Atlantic Ridge: A classic example of a mid-ocean ridge, demonstrating the formation of new ocean crust through seafloor spreading.
* East African Rift Valley: An example of a continental rift, where the African continent is slowly splitting apart.
In summary, divergent boundaries can form from both oceanic and continental landforms, ultimately resulting in the creation of new crust and the expansion of ocean basins.
