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Describe how the polarity of earth's magnetic field is recorded in the sea-floor?

Magnetic minerals in the Earth's crust align with the planet's magnetic field at the time of their formation. When new oceanic crust is created at mid-ocean ridges, these minerals record the direction of the Earth's magnetic field on the sea-floor. This creates alternating stripes of normal and reversed polarity as the sea-floor spreads.


Where does the oceanic crust begin?

The oceanic crust begins at the Mid-Ocean Ridge, where tectonic plates are moving apart, allowing magma to rise and solidify, forming new crust. This process of seafloor spreading creates the youngest oceanic crust at the ridge and older crust farther away from it.


What types of crust can be found in the lithosphere?

The lithosphere can have two main types of crust: continental crust and oceanic crust. Continental crust is thicker, older, and less dense than oceanic crust. Oceanic crust is thinner, younger, and denser, primarily composed of basaltic rocks.


Crust under the ocean is called?

Crust under the oceans is called oceanic crust.


What is continental and oceanic crust?

Continental crust is the thicker, less dense, and older type of crust found beneath continents, primarily composed of granite and sedimentary rock. Oceanic crust is the thinner, more dense, and younger type of crust located beneath oceans, primarily composed of basalt. The boundary between continental and oceanic crust is known as the continental-oceanic crust boundary.

Related Questions

Where can Alternating parallel bands of normal and reversed magnetic polarity are found in the basaltic bedrock on either side of the?

These alternating parallel bands of normal and reversed magnetic polarity are found in the basaltic bedrock on either side of mid-ocean ridges, where new oceanic crust is formed through seafloor spreading. This pattern is a result of the Earth's magnetic field periodically reversing over geological timescales, leaving a record of these reversals in the oceanic crust as it solidifies.


Oceanic crust is lighter than the continental crust?

No, the oceanic crust is denser. That's why the land areas "float" so much higher than the ocean bedrock.


Describe how the polarity of earth's magnetic field is recorded in the sea-floor?

Magnetic minerals in the Earth's crust align with the planet's magnetic field at the time of their formation. When new oceanic crust is created at mid-ocean ridges, these minerals record the direction of the Earth's magnetic field on the sea-floor. This creates alternating stripes of normal and reversed polarity as the sea-floor spreads.


What is oceanic-oceanic subduction?

Oceanic crust sinking under a plate with continental crust


Is the oceanic crust felsic or mafic?

Oceanic crust is mafic.


What does it mean if the oceanic crust 0?

the oceanic crust is 0.


What crust is more dense oceanic or continental crust?

Oceanic crust is significantly denser.


Where are the youngest portion of Earth's crust found?

The youngest parts of the Earth's crust are found in the oceanic crust. This crust is continuously being created at the mid-oceanic ridges.


Would it be better to drill through the earths crust or the oceanic crust?

oceanic crust


What is older the oceanic crust or the continental crust?

Continental crust is far older than oceanic crust.


Is the continental crust thinner than the oceanic crust?

It is not. The oceanic crust is thinner than the continental crust!


Is oceanic crust near the mid-ocean ridge older thean oceanic crust farther away from the ridge?

Its oceanic crust