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A rift zone is a feature of some volcanoes, especially shield volcanoes, in which a set of linear cracks (or rifts) develops in a volcanic edifice, typically forming into two or three well-defined regions along the flanks of the vent. [1] Believed to be primarily caused by internal and gravitational stresses generated by magma emplacement ...
Sedimentary basins are region-scale depressions of the Earth's crust where subsidence has occurred and a thick sequence of sediments have accumulated to form a large three-dimensional body of sedimentary rock. [ 1 ][ 2 ][ 3 ] They form when long-term subsidence creates a regional depression that provides accommodation space for accumulation of ...
Gulf of Suez Rift showing main extensional faults. In geology, a rift is a linear zone where the lithosphere is being pulled apart [1][2] and is an example of extensional tectonics. [3] Typical rift features are a central linear downfaulted depression, called a graben, or more commonly a half-graben with normal faulting and rift-flank uplifts ...
Divergent boundary. In plate tectonics, a divergent boundary or divergent plate boundary (also known as a constructive boundary or an extensional boundary) is a linear feature that exists between two tectonic plates that are moving away from each other. Divergent boundaries within continents initially produce rifts, which eventually become rift ...
Stages of the rift zone formation a. beginning of the uplift b. beginning of the rift zone with some magma chambers c. volcano formation and beginning of the crust spreading: Date: 3 April 2014: Source: using the idea of the rift zone formation and making it by using adobe illustrator and photoshop: Author: Suhib almasmoom
A map of East Africa showing some of the historically active volcanoes (as red triangles) and the Afar Triangle (shaded at the center), which is a so-called triple junction (or triple point) where three plates are pulling away from one another: the Arabian Plate and two parts of the African Plate—the Nubian and Somali—splitting along the East African Rift Zone Main rift faults, plates ...
The Atlantic rift zone is associated with the North Sea rifts zone. [13] "Rift basins share similar characteristics and histories, one that is conducive to evaporite deposition. They typically form during extension of the earth's crust with a distinct basement architecture made up of grabens and half-grabens segmented by transverse structures ...
Þingvallavatn. A rift valley is a linear shaped lowland between several highlands or mountain ranges produced by the action of a geologic rift. Rifts are formed as a result of the pulling apart of the lithosphere due to extensional tectonics. The linear depression may subsequently be further deepened by the forces of erosion.