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200 million.
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∙ 8y ago
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Is continental crust is made of rocks such as granite?
There are many different ryes of rocks in continental crust. Granite is one of the rocks that makes up continental crust.
Why is seafloor crust younger than continental crust?
You are possibly aware of plate tectonics, the surface of the earth is divided into a series of rigid plates of the lithosphere (the crust and upper part of the mantle). Example of one which is know well, the Pacific plate (ring of fire).The different plates meet at plate boundaries, three major types, the one we are interested in, is the divergent boundary (plates move apart).Such boundaries occur in mid oceans (mid-ocean ridges) and are associated with the addition of new crustal material from below the earth crust. As the crust moves away from the mid ocean ridge it becomes older. Therefore many million years ago the continental rocks were on the ocean bottom.This is a simplistic answer and have not taken into account the other two very important types which also contribute, which form volcanoes and mountain.As for the age of the sea floor would be in the order 125 to 200 million years old and the continental rocks in the order of a few billion years old.
Why are continental plates less dense than oceanic plates kids answer?
Continental crust and continental crust are made of different types of rock. The rocks in the continental crust do not contain as many of the heavier elements as the ones in the oceanic crust do.
What is the best description of the composition of the earth and crust?
Many different minerals are found in oceanic crust. Feldspar, basalt, pyroxene, and other molten rock materials make up the composition of the ocean's crust.
How many layers of the Jupiter and there name?
There are six layers on Jupiter and their names are: core, crust, rocks, cormasphere, mega scope, and likomock.
Rock in ocean crust are as old as how many years?
200 million.
Is continental crust is made of rocks such as granite?
There are many different ryes of rocks in continental crust. Granite is one of the rocks that makes up continental crust.
What features of the ocean floor is the deepest?
The ocean basins are the result of tectonic forces and processes. All of the ocean basins were formed from volcanic rock that was released from fissures located at the mid-oceanic ridges. The oldest rocks found in these basins are approximately 200 million years old. This is a lot younger than the oldest continental rocks which have ages greater than 4 billion years. The reason for this discrepancy is simple. Tectonic processes destroy old oceanic rocks! Oceanic rock is returned to the Earth's mantlewhen oceanic crust is subducted. Many of these subduction zones occur at the continental marginswhere oceanic crust meets continental crust. Subduction also creates the ocean's deep trenches.
What exists on earths crust?
crief boy quez
The rocks of Earth's crust are covered by what mineral?
The rocks of Earth's crust are composed of minerals of many types, rather than being covered by a specific mineral.
How Earth's crust formed?
the earth was a big hot ball made up of many rocks and gases. After millions of years the outer portion of the earth coooled down. We live on this outer layer of the earth called the Crust.
Why is seafloor crust younger than continental crust?
You are possibly aware of plate tectonics, the surface of the earth is divided into a series of rigid plates of the lithosphere (the crust and upper part of the mantle). Example of one which is know well, the Pacific plate (ring of fire).The different plates meet at plate boundaries, three major types, the one we are interested in, is the divergent boundary (plates move apart).Such boundaries occur in mid oceans (mid-ocean ridges) and are associated with the addition of new crustal material from below the earth crust. As the crust moves away from the mid ocean ridge it becomes older. Therefore many million years ago the continental rocks were on the ocean bottom.This is a simplistic answer and have not taken into account the other two very important types which also contribute, which form volcanoes and mountain.As for the age of the sea floor would be in the order 125 to 200 million years old and the continental rocks in the order of a few billion years old.
Where can you find natural metals?
In rocks and minerals of the Earth crust and in many humans artefacts.
What is the continental crust made out of?
continental crust is made of many rocks such as granite
Why are continental plates less dense than oceanic plates kids answer?
Continental crust and continental crust are made of different types of rock. The rocks in the continental crust do not contain as many of the heavier elements as the ones in the oceanic crust do.
WHAT is the the composition of earth's crust?
Many different minerals are found in oceanic crust. Feldspar, basalt, pyroxene, and other molten rock materials make up the composition of the ocean's crust.
How many years is the Pacific Ocean?
I would like to know how many years old the Pacific Ocean...!
