Mid Atlantic Tectonic Rift Valley (traverses the axis of Mid Atlantic Mountain Ridge, the longest in the world that runs across all of the Atlantic Ocean). Aerial footage. 4K Drone. UHD. Thingvellir (Parliament valleys), Iceland.
The Mid-Atlantic Ridge is geologically significant because it marks the boundary where the North American and Eurasian tectonic plates meet and separate. Volcanic eruptions at this boundary create new ocean floor and at the same time push the two tectonic plates apart at rates of 1 cm to 20 cm per year, a process known as sea-floor spreading. As oceanic plates move apart, rock melts and wells up from tens of kilometers deep producing enormous volcanic eruptions of basalt, and building the longest chain of volcanoes in the world.
Rift valleys of Mid Atlantic Ridge:
The Mid-Atlantic Ridge includes a deep rift valley that runs along the axis of the ridge along nearly its entire length. This rift marks the actual boundary between adjacent tectonic plates, where magma from the mantle reaches the seafloor, erupting as lava and producing new crustal material for the plates.
A rift valley is a lowland region that forms where Earth’s tectonic plates move apart, or rift. Rift valleys are found both on land and at the bottom of the ocean, where they are created by the process of seafloor spreading. Rift valleys differ from river valleys and glacial valleys in that they are created by tectonic activity and not the process of erosion.
The place where the Mid-Atlantic Ridge is best visible is at Thingvellir National Park, in southwestern Iceland. The continental drift between the North American and Eurasian Plates can be clearly seen in the cracks or faults which traverse the region, the largest one, Almannagjá, being a veritable canyon.
#MidAtlanticRidge #TectonicRift #RiftValley #Thingvellir #Iceland #MidAtlantic #Geology
