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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 ...
The volcanic origin of the islands in the lake is clearly visible. The cracks and faults around it, of which the Almannagjá [ˈalˌmanːaˌcauː] ravine is the largest, is where the Eurasian and North American tectonic plates meet. Silfra fissure is a popular scuba and snorkeling site.
Snorkeling in the Silfra canyon. Scuba diver in the Silfra. The Alþingi (assembly) at Þingvellir was Iceland's supreme legislative and judicial authority from its establishment in 930 until 1271. The Lögberg or Law Rock was the focal point of the Alþingi and a natural platform for holding speeches. The Lawspeaker, elected for three years at ...
Obduction zones occurs when the continental plate is pushed under the oceanic plate, but this is unusual as the relative densities of the tectonic plates favours subduction of the oceanic plate. This causes the oceanic plate to buckle and usually results in a new mid-ocean ridge forming and turning the obduction into subduction. [citation needed]
Plate tectonics is a theory developed during the 1960s which describes the movement of continents by way of the separation and collision of crustal plates. It is in a sense structural geology on a planet scale, and is used throughout structural geology as a framework to analyze and understand global, regional, and local scale features.
An interplate earthquake occurs at the boundary between two tectonic plates. Earthquakes of this type account for more than 90 percent of the total seismic energy released around the world. [1] If one plate is trying to move past the other, they will be locked until sufficient stress builds up to cause the plates to slip relative to each other.
Indo-Australian plate – Major tectonic plate formed by the fusion of the Indian and Australian plates (sometimes considered to be two separate tectonic plates) – 58,900,000 km 2 (22,700,000 sq mi) Australian plate – Major tectonic plate separated from Indo-Australian plate about 3 million years ago – 47,000,000 km 2 (18,000,000 sq mi)
The Gakkel Ridge (formerly known as the Nansen Cordillera and Arctic Mid-Ocean Ridge) [1] is a mid-oceanic ridge, a divergent tectonic plate boundary between the North American Plate and the Eurasian Plate. [2] It is located in the Eurasian Basin of the Arctic Ocean, between Greenland and Siberia.
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