What Causes Magnetic Stripes On The Seafloor, Such As Those Shown Here??


What Causes Magnetic Stripes On The Seafloor, Such As Those Shown Here??

When lava gets erupted at the mid-ocean ridge axis it cools and turns into hard rock. … This creates a symmetrical pattern of magnetic stripes of opposite polarity on either side of mid-ocean ridges. These patterns of stripes provide the history of seafloor spreading.

What causes magnetic stripes on the seafloor quizlet?

Why does the rock of the ocean floor have a pattern of magnetic stripes? The rock of the ocean floor contains iron. As molten material cooled and hardenend, the iron bits inside lined up in the direction of Earth’s magnetic poles, creating a pattern of magnetized stripes.

How did the Red Sea form it is shown between Arabia and Africa in this figure?

How did the Red Sea, shown between Arabia and Africa in this figure, form? Continental Rifting followed by seafloor spreading.

Why are the patterns showing the age of the seafloor symmetrical in the Atlantic Ocean but not the Pacific Ocean?

On a map showing the age of the seafloor, why are the patterns symmetrical in the Atlantic Ocean but not the Pacific Ocean? … Spreading along the Atlantic ridge added seafloor to plates on both sides, while subduction has consumed large areas of old oceanic crust in the Pacific.

What makes a zig zag pattern on the seafloor?

Transform boundaries are faults that connect two areas where plates are converging or diverging. The edges of these continental boundaries usually form zig-zag patterns.

How do magnetic stripes on the ocean floor serve as evidence for seafloor spreading quizlet?

How do strips of magnetized rock on the ocean floor provide evidence of sea-floor spreading? Strips of ocean-floor basalt record the polarity of Earth’s magnetic field at the time the rock formed. … The pattern shows that ocean floor forms along mid-ocean ridges and then moves away from the ridge.

Which statement accurately describes how magnetic stripes in ocean rock provide?

Which statement accurately describes how magnetic stripes in ocean rock provide evidence of seafloor spreading? C. The pattern of magnetic strips shows that the seafloor is expanding at mid-ocean ridges.

How magnetic patterns develop on the seafloor?

The striped magnetic pattern develops because, as oceanic crust pulls apart, magma rises to the surface at mid-ocean ridges and spills out to create new bands of ocean floor. … Later, after the planet’s magnetic field flips again, the next stripe of new ocean floor aligns its polarity in the opposite direction.

Does the Red Sea still exist?

The Red Sea compensates for the large water volume it loses each year through evaporation by importing water from the Gulf of Aden—through the narrow Strait of Bab Al Mandeb between Yemen on the Arabian Peninsula and Djibouti and Eritrea on the Horn of Africa. … The Red Sea Eastern Boundary Current exists only in winter.

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Can you swim in the Red Sea?

The perfect diving spots

It’s no wonder that the Red Sea is a major hot spot for scuba diving and snorkeling when you consider the rich variety of its underwater ecosystem. … Nearly 20% of these are found only in the Red Sea. Divers can swim with brightly colored angelfish, butterflyfish and clownfish.

Is the magnetic stripe pattern?

At the mid-ocean ridge spreading axis, these flips in the direction of the Earth’s magnetic field are recorded in the magnetization of the lava. This creates a symmetrical pattern of magnetic stripes of opposite polarity on either side of mid-ocean ridges.

What does the magnetic stripes pattern represent?

This represents periodic reversals in the direction of the Earth’s magnetic field.

What is the pattern seen in the ages of the seafloor within the pattern where is the seafloor oldest and where is it youngest?

The age pattern is symmetric. Youngest ages are at the middle of the pattern (on the oceanic ridges) and the seafloor grows older moving outwards to each side of the middle. 4. … Notice how the oldest crust is on the outside edges and the youngest crust is in the middle of the seafloor.

Which causes waves in the ocean to occur quizlet?

Waves are most commonly caused by wind. Wind-driven waves, or surface waves, are created by the friction between wind and surface water. As wind blows across the surface of the ocean or a lake, the continual disturbance creates a wave crest.

What makes the seafloor spread?

Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle’s convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor. Eventually, the crust cracks.

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How deep is the bottom of the ocean?

The average depth of the ocean is about 12,100 feet . The deepest part of the ocean is called the Challenger Deep and is located beneath the western Pacific Ocean in the southern end of the Mariana Trench, which runs several hundred kilometers southwest of the U.S. territorial island of Guam.

Why magnetic anomaly patterns appear on the ocean floor?

Magnetic surveys over the oceans have revealed a characteristic pattern of anomalies around mid-ocean ridges. … They are magnetized when ocean crust is formed at the ridge. As magma rises to the surface and cools, the rock acquires a thermoremanent magnetization in the direction of the field.

How do the parallel magnetic stripes near mid-ocean ridges form quizlet?

Explain why magnetic strips on the seafloor are parallel to the mid-ocean ridge. New rock is formed when lava erupts along the length of the ridge. When the seafloor spreads, this rock separates and moves in opposite directions, forming lines that are parallel to the ridge.

How do magnetic stripes of iron in the ocean rocks provide evidence of seafloor spreading?

How do magnetic stripes of iron in ocean rock provide evidence of seafloor spreading? … They show how the density of the seafloor has changed. They reveal a matching pattern on either side of the ridge. They reveal differences in the mineral composition of newly created rock.

What do you notice about the magnetic stripe pattern on each side of the oceanic ridge?

The stripes are symmetric across the Oceanic Ridge. They create a mirror image. It suggests that new seafloor is formed in the middle (at the Ridge) and some of the new seafloor moves to each side of the Ridge forming a symmetric pattern.

How does a scientist use the magnetic field magnetic strips or magnetic lines in explaining the seafloor spreading theory?

Magnetic polarity stripes give clues to seafloor ages and the importance of mid-ocean ridges in the creation of oceanic crust. Seafloor spreading processes create new oceanic crust at mid-ocean ridges and destroy older crust at deep sea trenches.

How are magnetic stripes created in sea floor basalts?

Most basalt magmas contain abundant molten iron. As magma starts to harden into rock, iron-rich minerals solidify first. Their crystals are pulled into alignment by the Earth’s magnetic field, just like a compass needle is pulled towards magnetic north.

How do magnetic stripes show the history of Earth’s magnetic field?

As rocks crystallize from lava at the ridges, they literally record the magnetic field of the Earth at the time of their creation. … The two parts of the oceanic plate are pulled apart, and magnetic stripes become older as they move away from the mid-ocean ridge.

Why are magnetic stripes in the Pacific Ocean wider than in the Atlantic Ocean?

Magnetic stripes in the Pacific Ocean are wider because the seafloor spreads more rapidly there than in the Atlantic Ocean. … Seafloor sediment increases in thickness away from the mid-ocean ridge because the oceanic crust is older farther away from the ridge.

Why is the sea salty?

Salt in the sea, or ocean salinity, is mainly caused by rain washing mineral ions from the land into water. Carbon dioxide in the air dissolves into rainwater, making it slightly acidic. … Isolated bodies of water can become extra salty, or hypersaline, through evaporation. The Dead Sea is an example of this.

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What happened on the Dead Sea?

The Dead Sea is shrinking, and as it recedes, the fresh water aquifers along the perimeter of the lake are receding along with it. As this fresh water diffuses into salt deposits beneath the surface of the shoreline, the water slowly dissolves the deposits until the earth above collapses without warning.

Where is the the Dead Sea?

The Dead Sea is a landlocked salt lake between Israel and Jordan in southwestern Asia.

Why is it called the Black Sea?

Why is the Black Sea black? The sea was first named by the ancient Greeks who called it “Inhospitable Sea.” The sea got this reputation because it was difficult to navigate, and hostile tribes inhabited its shores.

Why are there no sharks in the Dead Sea?

The hot climate of the area surrounding the Dead Sea means what little fresh water gets to the Dead Sea evaporates quickly. … If you went swimming in the Dead Sea, you wouldn’t see any skeletons or lifeless fish floating on its surface. You also wouldn’t see any big, bad sharks or giant squid hunting in its depths.

Are there sharks in Egypt?

Grey reef sharks are the most commonly spotted species in Egypt’s Red Sea, along with black and whitetip reef sharks which are also often seen. … Top dive sites: This is the most common species seen while shark diving in Egypt, with encounters possible at most of the region’s popular dive sites.

Magnetic Striping and Seafloor Spreading

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