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It varies tremendously as new crust is being created all the time (for example at erupting volcanoes and mid-ocean-ridges) which are literally creating crust as you read this, up to the most ancient continental "cratons", the very ancient interiors of continents such as the Canadian shield which may be anywhere in the range from about 3.7 to 4.28 billion years.
Wiki User
∙ 12y ago
Wiki User
∙ 14y agoEvidence exists that some crust had formed between 4.3 and 4.0 billion years ago.
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How many millions of year ago did the first unicellular life appear?
Slightly more than 3000 million years ago, perhaps even as long as 3500 million years ago shortly after the earth's crust cooled just enough for bodies of liquid water to accumulate on its surface.
How do vibrations move through earth's crust?
There are three types of vibrations:- Primary waves, Secondary waves and long waves. Primary waves can move through solid and liquid. Secondary waves move through only solids and long waves can only move along the surface of the earth's crust.
Why is lava and magma not a rock?
Lava and magma are not rocks because they are liquids and cant harden because they are to hot to harden and cant cool themselves down long enough to form a hard structure. Magma and lava is rock - it's just been superheated by the Earth's core.
What are some good questions about Venus?
Try these:What is the surface temperature of Venus?What corrosive material is a major component of the clouds of Venus?How long was the longest time a lander was able to function on the surface of Venus?What was the first country to land a functioning lander on Venus' surface?Why has Venus traditionally been called Earth's twin?Why is the crust of Venus so thin compared to Earth's crust?Why is the crust of Venus so much younger than Earth's crust?Why does Venus lack moons?Does it rain or snow on the surface of Venus?How long is one Venus year in Venus days?
What suggest about when these particular continents broke up?
A long long time ago, maybe about 1,000,000 years ago, the mantel which is under the earth's crust (and we're standing on the earth's crust) was just like the earth's crust. But now it is hot melted rock. Over the years the mantel gets hotter. The Mantel gets so hot that it melts through the continents and separates them even more. Answer Plate Tectonics. The earths crust is floating on the molten magma which is what the centre of the Earth is made of. There are currents in the magma which tore the original single land mass (Pangea) apart and dragged the pieces apart. The pieces, called plates, are still drifting. Sometimes they crash into each other like India and Asia.
A long narrow crack in earth crust is called?
Fault
How thick is earth's crust in miles?
It is 25 miles long.
What are long cracks in the earth's crust called?
It's called a "fault"
When the Earth's crust collides mountains are formed.?
So long as one plate is not subducted.
When was the first iceberg formed?
Sometime back in prehistory, when the Earth had cooled enough, and stayed cool long enough.
How long does it take for grape popsicle to harden?
It takes at least 3 days to harden.
How many millions of year ago did the first unicellular life appear?
Slightly more than 3000 million years ago, perhaps even as long as 3500 million years ago shortly after the earth's crust cooled just enough for bodies of liquid water to accumulate on its surface.
What is the youngest part of earth's crust?
The youngest parts of the Earth's crust are the midocean rifts. It is approximately 1,500 km wide, 1 to 3 km high, and over 84,000 km long.
What was the climate in neanderthal times?
During Neanderthal times, the climate was characterized by several ice ages, with alternating cold glacial periods and warmer interglacial periods. Neanderthals adapted to these changing climatic conditions by developing specialized survival strategies.
How is gold removed from the earth?
i think gold is removed from the earth by the earths crust and by mining(digging)for long.When they mine for long the gold get removed from the earth. That's all is what I have to say.Thank you.
How do vibrations move through earth's crust?
There are three types of vibrations:- Primary waves, Secondary waves and long waves. Primary waves can move through solid and liquid. Secondary waves move through only solids and long waves can only move along the surface of the earth's crust.
If you could dig one foot per minute how long would it take you to dig through the Earth's crust?
Months
