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The Hadean eon represents the time interval between 4.6 billion to 4 billion years back. It is marked by the initial formation of the earth , right from the time of gathering and accumulation of interstellar dust particles and gases, and there was frequent collision between the planetesimals of relatively larger in size. The core and the crust formed and started to become stable and also gradually led to the formation and expansion of the ocean and the earth's atmosphere.
This is how the earth gradually started to form and develop and took the shape during the time interval between 4.6 billion to 4.2 billion years old, and where the oldest rocks found on earth is dated from about 4.2 billion years in the past.
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As of 2020, there are 12 countries in South America: Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Suriname, Uruguay and Venezuela. French Guiana is an overseas territory of France and not an independent country.
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Weather is the Current state of the Atmosphere
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Asia, Australia, North and South America
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The Nubian capital of Meroë was an important producer of iron. The correct option among all the options that are given in the question is option "b". <span>Meroë is actually an ancient city that was located on the east bank of the river Nile. I hope that the answer has come to your help.</span>
