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What is the earth's crust the outer lighter portion of?
The earth's crust is the outer lighter portion of the continental crust. The crust beneath the ocean iscomosed of heavy, dark volcanic rock. The continental crust is composed mostly of lighter rocks rich in silica such as granite.
What is the moving portion of earths crust and upper mantle?
The moving portion of Earth's crust and upper mantle is known as the lithosphere. It is broken into tectonic plates that float on the semi-fluid asthenosphere below, causing them to move and interact with each other, which leads to processes like earthquakes, volcanic eruptions, and mountain building.
What is the measurement of the earth's crust?
The Earths crust is about 6miles thick and it covers the entire earth even at the bottom of oceans. The crust is only the beginning of the Earth and underneath is the mantle, outer layer and inner core.
Continents and the ocean floor are part of earths solid rocky surface called?
crust
What is the the width of the crust?
over 7 miles
What is the earth's crust the outer lighter portion of?
The earth's crust is the outer lighter portion of the continental crust. The crust beneath the ocean iscomosed of heavy, dark volcanic rock. The continental crust is composed mostly of lighter rocks rich in silica such as granite.
What is the moving portion of earths crust and upper mantle?
The moving portion of Earth's crust and upper mantle is known as the lithosphere. It is broken into tectonic plates that float on the semi-fluid asthenosphere below, causing them to move and interact with each other, which leads to processes like earthquakes, volcanic eruptions, and mountain building.
Why the oceans floor is considered part of Earth's crust?
earths crust includes ocean floors and
What is the measurement of the earth's crust?
The Earths crust is about 6miles thick and it covers the entire earth even at the bottom of oceans. The crust is only the beginning of the Earth and underneath is the mantle, outer layer and inner core.
What is a gradually sloping portion of the ocean floor that is made of the continental crust?
Continental shelf.
What is a gradually Sloping portion of the ocean floor that is made of continental crust?
Continental shelf.
Continents and the ocean floor are part of earths solid rocky surface called?
crust
Why are the oldest parts of the ocean floor no older than about 200 million years.?
Because the oldest parts reach the continental crust and then the ocean floor sinks beneath the continental crust, into the mantle.
What is the the width of the crust?
over 7 miles
Is the underlying rock beneath the ocean floor silica?
The underlying rock beneath the ocean floor is primarily basalt, which is a mafic rock rich in iron and magnesium. Silica-rich rocks like granite are typically found in continental crust, not beneath the ocean floor.
How many meters deep is the crust?
The Earth's crust varies in thickness, but on average it is about 30 kilometers (18.6 miles) deep beneath the continents and about 5-10 kilometers (3-6 miles) deep beneath the ocean floor.
Old ocean floor is destroyed and absorbed by the Earth and remelted beneath what?
Old ocean floor is destroyed and absorbed by the Earth at subduction zones, where tectonic plates collide and one plate is forced beneath the other. The remelting occurs beneath volcanic arcs, where the subducted crust melts and rises to the surface as magma, leading to the formation of new crust.
