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Columbia, also known as Nuna or Hudsonland, is a hypothetical ancient supercontinent. It was first proposed by John J.W. Rogers and M. Santosh in 2002 [ 1 ] and is thought to have existed approximately 2,500 to 1,500 million years ago (Ma), in the Paleoproterozoic era.
Columbia (Nuna) 2100 Paleoproterozoic Supercontinent Oldest widely accepted supercontinent. also known as Nuna. [13] [3] East Antarctica: Craton [14] East European: Craton The cratonic core of Baltica or a synonym for the paleocontinent [2] [10] Gondwana: 500 Late Neoproterozoic Continent Also described as a supercontinent [4] [15] India ...
[10] [11] Those peaks coincide with the age of supercontinent assembly. [10] [11] The Columbia assembled through a global collision event during 2.1-1.8 Ga. [9] Therefore, the constituent continental blocks of the Columbia should record a larger population of 2.1-1.8 Ga detrital zircon.
Supercontinent Columbia splits apart: linked to continental rifting along west margin of Laurentia, east India, south Baltica, southeast Siberia, northwest South Africa and North China Block, formation of Ghats Province in India. First structurally complex eukaryotes (Horodyskia, colonial formamiferian). 1.4–1.1 Ga
Between 2.3-2.0 billion year ago, the Western Block collided with the two arc on its both sides, creating Hengshan granulite belt in the southeast and Inner Mongolia-Northern Hebei Orogen with khondalite belt inside in the northwest. Finally, supercontinent Columbia collided in the northern margin of the North China Craton at 1.8 billion years ago.
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.
Supercontinent cycle This page was last edited on 11 June 2022, at 07:42 (UTC). Text is available under the Creative Commons Attribution-ShareAlike 4.0 License ...
The supercontinent Columbia formed between 2.0 and 1.7 Ga and remained intact until at least 1.3 Ga. Geological and paleomagnetic evidence suggest that Columbia underwent only minor changes to form the supercontinent Rodinia from 1.1 to 0.9 Ga. Paleogeographic reconstructions suggest that the supercontinent assemblage was located in equatorial ...