The Beginning of Plate Tectonics


Continents form
3 billion years ago?

Today, Earth’s surface is divided into a few dozen plates of rock, one of which sometimes ploughs under another to be destroyed in the planet’s molten heart. This process, called plate tectonics, is thought to have begun around 3 billion years ago. Only when plate tectonics had come into operation could the first continent, nicknamed ‘Ur’, come into being.

See other: History of Life

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One thought on “The Beginning of Plate Tectonics

  1. Interesting choice of names – Wictionary informs that “Ur” is most often used as a prefix, “forming words with the sense of ‘primitive’, which seems highly fitting for a first continent.

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