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In geology, a supercontinent is the assembly of most or all of Earth's continental blocks or cratons to form a single large landmass. [ 1 ] [ 2 ] [ 3 ] However, some geologists use a different definition, "a grouping of formerly dispersed continents", which leaves room for interpretation and is easier to apply to Precambrian times. [ 4 ]
Continental assembly and uplift also meant increasingly arid land climates, favoring the evolution of amniote animals and seed plants, whose eggs and seeds were better adapted to dry climates. [40] The early drying trend was most pronounced in western Pangaea, which became a center of the evolution and geographical spread of amniotes.
Map of Pangaea with modern continental outlines. The supercontinent cycle is the quasi-periodic aggregation and dispersal of Earth's continental crust.There are varying opinions as to whether the amount of continental crust is increasing, decreasing, or staying about the same, but it is agreed that the Earth's crust is constantly being reconfigured.
The formation of a new “supercontinent” could wipe out humans and all other mammals still alive in 250 million years, researchers have predicted.
The idea that a supercontinent existed in the early Neoproterozoic arose in the 1970s, when geologists determined that orogens of this age exist on virtually all cratons. [9] [failed verification] Examples are the Grenville orogeny in North America and the Dalslandian orogeny in Europe. Since then, many alternative reconstructions have been ...
Fossils dating back to Pangean times also support the claim that a strongly-monsoonal circulation dominated the supercontinent’s climate. For example, tree rings (also called growth rings) provide convincing proof of distinct changes in annual weather patterns. Trees rooted in areas that do not experience seasonality will not exhibit rings ...
Supercomputer simulations predicted the climatic consequences of Earth's potential supercontinent formation, which could pose a threat to human survival. A Simulation Says Earth Will Turn Into One ...
Zealandia had so much promise as the eighth continent on Earth. Well, it did—until about 95 percent of the mass sunk under the ocean. While the majority of Zealandia may never host inhabitants ...
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