Search results
Results from the WOW.Com Content Network
The axis of the rift area may contain volcanic rocks, and active volcanism is a part of many, but not all, active rift systems. Major rifts occur along the central axis of most mid-ocean ridges, where new oceanic crust and lithosphere is created along a divergent boundary between two tectonic plates.
The rift system is thought to have formed in response to compression of the lithosphere in front of the zones of collision that formed the Alps and Pyrenees. The initial rift propagated northwards as the collision along the Alps intensified and the western part of France moved to the west. [1]
Aegir Ridge – Extinct mid-ocean ridge in the far-northern Atlantic Ocean; Anza trough – Rift in Kenya that was formed in the Jurassic Period; Bahr el Arab rift – Major geological feature in the southwest Sudan; Benue Trough – Major geological structure underlying a large part of Nigeria
Mid-ocean ridges exhibit active volcanism and seismicity. [3] The oceanic crust is in a constant state of 'renewal' at the mid-ocean ridges by the processes of seafloor spreading and plate tectonics. New magma steadily emerges onto the ocean floor and intrudes into the existing ocean crust at and near rifts along the ridge axes. The rocks ...
[24] [16] [25] The fundamental architectural element in many extensional basins is the half-graben, formed within the hanging walls of major rift-bounding or intra-rift basin faults. The location and number of half grabens are influenced by the position of the main faults and the width of the rift zone, which depends on the rheology , crustal ...
The Mid-Atlantic Ridge is a mid-ocean ridge (a divergent or constructive plate boundary) located along the floor of the Atlantic Ocean, and part of the longest mountain range in the world. In the North Atlantic, the ridge separates the North American from the Eurasian plate and the African plate , north and south of the Azores triple junction .
European Commission President Ursula von der Leyen remained positive about the chances that the new pact could become a reality, hailing this week's deal to establish extraordinary measures that a ...
Silfra fissure The Mid-Atlantic Ridge passing through Þingvellir Rocks and boulders that have piled up in the fissure due to earthquakes.. Silfra (Icelandic pronunciation: [ˈsɪl(v)ra]) is a rift formed in the Mid-Atlantic Ridge – the divergent tectonic boundary between the North American and Eurasian plates – and is located in the Þingvallavatn Lake in the Þingvellir National Park in ...