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Map of Pangea around 250 million years ago, at the beginning of the Triassic. Pangaea or Pangea (/ p æ n ˈ dʒ iː ə / pan-JEE-ə) [1] was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. [2]
Locality map showing the Rio Grande rift extending from southern Colorado to Chihuahua, Mexico. The Rio Grande follows this rift for much of its course. The Rio Grande rift is a north-trending continental rift zone. It separates the Colorado Plateau in the west from the interior of the North American craton on the east. [1]
Secular trends such as carbonatites, granulites, eclogites, and greenstone belt deformation events are all possible indicators of Precambrian supercontinent cyclicity, although the Protopangea–Paleopangea solution implies that Phanerozoic style of supercontinent cycles did not operate during these times. Also, there are instances where these ...
Ontong Java Plateau [r] Galápagos hotspot Turonian: 93.5 ± 0.8 * Cenomanian-Turonian boundary event (91.5 ± 8.6) [s] Madagascar flood basalt (94.5±1.2) Cenomanian: 100.5 * Lower: Albian: c. 113.0 Kerguelen Plateau (110) [t] Rajmahal Traps (118) [u] Kerguelen hotspot Aptian: c. 125.0 Selli Event (~120) [s] Ontong Java Plateau (125–120) [r ...
Plate tectonics (from Latin tectonicus, from Ancient Greek τεκτονικός (tektonikós) ' pertaining to building ') [1] is the scientific theory that the Earth's lithosphere comprises a number of large tectonic plates, which have been slowly moving since 3–4 billion years ago.
The rift is extending in an ESE-WNW direction at about 5–7 millimetres (0.20–0.28 inches) annually. [3] The Ethiopian rift valley is about 80 kilometres (50 mi) wide and bordered on both margins by large, discontinuous normal faults that give rise to major tectonic escarpments separating the rift floor from the surrounding plateaus. These ...
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A flood basalt (or plateau basalt [1]) is the result of a giant volcanic eruption or series of eruptions that covers large stretches of land or the ocean floor with basalt lava. Many flood basalts have been attributed to the onset of a hotspot reaching the surface of the Earth via a mantle plume . [ 2 ]