At the mid-ocean ridgemid-ocean ridgeAt nearly 60,000 kilometers (37,000 miles) long, the mid-ocean is the longest mountain range on Earth. It formed and evolves as a result of spreading in Earth’s lithosphere—the crust and upper mantle—at the divergent boundaries between tectonic plates.https://www.whoi.edu › seafloor-below › mid-ocean-ridgesMid-ocean Ridges – Woods Hole Oceanographic Institution 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 causes magnetic stripes on the seafloor quizlet?
- What causes magnetic stripes on the sea floor?
- How do magnetic stripes form on the ocean floor serve as evidence for seafloor spreading?
- How do magnetic anomaly patterns on the ocean floor best serve as evidence for seafloor spreading?
- How did the Red Sea shown between Arabia and Africa in this figure form quizlet?
- How fast do plates move relative to one another quizlet?
- How fast do the plates typically move group of answer choices?
- What causes seafloor spreading quizlet?
- What do the magnetic anomalies along the seafloor indicate?
- How do magnetic stripes of iron in ocean rock provide evidence of seafloor spreading?
What causes magnetic stripes on the seafloor quizlet?
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.
What causes magnetic stripes on the sea floor?
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.
How do magnetic stripes form on the ocean floor serve as evidence for seafloor spreading?
When the Earth's magnetic field reverses, a new stripe, with the new polarity, begins. Such magnetic patterns led to recognition of the occurrence of sea-floor spreading, and they remain some of the strongest evidence for the theory of plate tectonics. The figure below includes two images of the ocean floor.
Magnetic Striping And Seafloor Spreading
How do magnetic anomaly patterns on the ocean floor best serve as evidence for seafloor spreading?
magnetic polarity reversals. How do magnetic anomaly patterns on the ocean floor best serve as evidence for seafloor spreading? The symmetry on either side of mid-ocean ridges shows that new crust is created and then split apart.
How did the Red Sea shown between Arabia and Africa in this figure form quizlet?
How did the Red Sea, shown between Arabia and Africa in this figure, form? Continental Rifting followed by seafloor spreading. On this figure of a continental collision, which continent would have had subduction-related magmatism before the collision? The continent on the right.
How fast do plates move relative to one another quizlet?
How fast do tectonic plates move? They move at speeds ranging from 1 to 16 cm (0.4 to 6.3 in) per year.
Seafloor Spreading
How fast do the plates typically move group of answer choices?
They move at a rate of one to two inches (three to five centimeters) per year.
What causes seafloor spreading quizlet?
The older rock moves outward on both sides of the ridge as new rock forms in the center of the ridge from cooling of molten material. This process is sea floor spreading.
Magnetic Anomalies And Plate Reconstruction (Class 7- V2)
What do the magnetic anomalies along the seafloor indicate?
A marine magnetic anomaly is a variation in strength of Earth's magnetic field caused by magnetism in rocks of the ocean floor. Marine magnetic anomalies typically represent 1 percent of the total geomagnetic fieldgeomagnetic fieldmagnetic pole, region at each end of a magnet where the external magnetic field is strongest. A bar magnet suspended in Earth's magnetic field orients itself in a north–south direction. The north-seeking pole of such a magnet, or any similar pole, is called a north magnetic pole.https://www.britannica.com › science › magnetic-polemagnetic pole | physics - Encyclopedia Britannica strength.
How do magnetic stripes of iron in ocean rock provide evidence of seafloor spreading?
How do magnetic stripes of iron in ocean rock provide evidence of seafloor spreading? They show when Earth's poles reversed. They show how the density of the seafloor has changed. They reveal a matching pattern on either side of the ridge.