Question: How it was concluded that the Earth's geological past, Terra was virtually a sea of lava?
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Thank you , Daniel
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Hi malina2504,
Well, it was more like a ball of lava!!. But If you think a bit about it, the Earth is still pretty much a ball of really hot rock. The sub-lithospheric mantle is about 1500°C and the core is even hotter. So it is easy to think that originally the Earth was even hotter (it is losing heat everyday), including the crust.
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Hi!
Daniel has already told you a bit about the characteristic of the Earth’s interior. And we know that through the observations that scientists can do using seismic waves.
To formulate their theories about the origin of our planet, scientists use both physical evidence and numerical simulations. For example, astronomers observe other systems in the universe when they start forming and compare them to our solar system, to understand how it also formed.
So they use what they see on our planets to add new data to their numerical simulations, which can help them understand what may have happened when the Earth formed.
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when the Earth was forming, it’s likely that the whole planet was made of molten material due to the heat of impacts among other things. The crust of the Earth that you see today, very simply, is the cooled solid outer surface of the earth. When the first crust formed, it would have basically been molten lava that became solid and then developed from that point. But Daniel and Alice are right, under the surface there is still a lot of heat and molten material, only the outside cooled down.
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