WebThe asthenosphere is semi-molten material below the lithosphere on which the plates of the lithosphere ‘float’. The asthenosphere is several hundred kilometres thick. Continental Oceanic Age 3800 million ##### 200. million Thickness 30-70km 5-9km Density 2/cm 3 3/cm 3 Main rock type. Granite Basalt. Materials SIAL SIMA. Plate tectonic theory Web29 jan. 2024 · The island of Iceland resulted from a massive and violent movement between two enormous tectonic plates that have been drifting apart continuously and unstoppably, forming the island’s landscapes over the last 18 million years. Silfra is a newly opened rift between the North American and Eurasian tectonic plates.
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Web24 apr. 2024 · Convergent tectonic plate boundaries occur where two plates meet. In the case of a heavy ocean crust meeting a lighter continental plate, the oceanic crust is forced underneath the continental one. This creates a steep and very deep oceanic trench close to the continental shelf. High mountain ranges are associated with subduction zones. Web14 apr. 2024 · Silfra is the product of Iceland’s location on the border between the North American tectonic plate and the Eurasian tectonic plate . It is called the Mid-Atlantic Ridge. These plates are kind of the rafts that the continents sit on while they’re floating around on the magma under the earth’s crust. These two plates are slowly moving away ... download google slides with speaker notes
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Web12 apr. 2024 · The two events, 7.8- and 7.5-magnitudes respectively, caused thousands of deaths and widespread destruction of infrastructure. Both occurred along the East Anatolian fault, one of Turkey’s two main earthquake zones and a boundary between two of Earth’s tectonic plates, the Arabian Plate and the Anatolian Plate. WebA tectonic plate is a massive plate that consist of solid rock. A tectonic plate floats loose from other tectonic plates but comes close to them and interacts with them where their edges meet, like underneath Iceland. The … Web20 dec. 2024 · The rift is a narrow zone that is a developing divergent tectonic plate boundary, in which the African Plate is in the process of splitting into two tectonic plates, called the Somali Plate and the … class 11 sociology part 2 ncert pdf