50 years in the past, scientists dug into Pangaea’s previous lives

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Earlier than Pangaea — What? — Science Information, September 30, 1972

The continents as we all know them resulted when the proto­continent Pangaea broke aside and its fragments made the lengthy sluggish journey to their current positions. The method took about 200 m­illion years. However the Earth’s crust is an estimated 4.5 billion years previous.… [Scientists are exploring] the perplexing p­roblem of what went on through the billions of years earlier than Pangaea went to items.

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The continents have an on-again, off-again relationship that has existed since nicely earlier than Pangaea, fossil and rock proof reveals. Most scientists agree that the earliest recognized supercontinent, known as Nuna, fashioned round 1.5 billion years in the past. It broke aside and reunited because the supercontinent Rodinia about 1 billion years in the past. A 3rd supercontinent known as Pannotia might have fashioned roughly 600 million years in the past close to the South Pole, however its existence is debated. Immediately, scientists are predicting how continents will merge sooner or later. A supercontinent dubbed Amasia might kind 250 million years from now because the continents drift towards the North Pole (SN: 1/21/17, p. 18).

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Citations
D.A.D Evans. Pannotia below prosecution. Geological Society, London, Particular Publications. Vol. 503, October 13, 2020, p. 63. doi: 10.1144/SP503-2020-182.J.B. Murphy et al. Pannotia: in defence of its existence and geodynamic significance. Geological Society, London, Particular Publications. Vol. 503, August 27, 2020, p. 13. doi: 10.1144/SP503-2020-96.H.S. Davies, J.A. Mattias Inexperienced and J.C. Duarte. Again to the long run: Testing completely different eventualities for the following supercontinent gathering. International and Planetary Change. Vol. 169, October 2018, p. 133. doi: 10.1016/j.gloplacha.2018.07.015.L.A. Purrett. Earlier than Pangaea — What? Science Information. Vol 102. September 30, 1972, p. 220.

Erin I. Garcia de Jesus is a workers author at Science Information. She holds a Ph.D. in microbiology from the College of Washington and a grasp’s in science communication from the College of California, Santa Cruz.

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