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Magnetite, a mineral found in basalt, the rock that makes up the sea floor, has particles in it which align themselves with the polar alignment of the earth (North and South). Every once in a while, in Earth's history, the polar alignment switches (North becomes South, South becomes North) and so do the magnetite particles. Thus, there are matching bands on each side of a spreading center where the magnetite has switched as the rock came out of the spreading center.
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What evidence supports seafloor spreading?
Evidence supporting seafloor spreading includes the symmetrical patterns of magnetic stripes on either side of mid-ocean ridges, which show reversals in Earth's magnetic field over time. Additionally, the age of oceanic crust increases with distance from the ridge, indicating that new crust is formed at the ridge and gradually moves outward. The presence of deep-sea sediments also supports this theory, as they are thinner and younger near the ridges and become thicker and older further away. Finally, the distribution of earthquakes and volcanic activity along mid-ocean ridges aligns with the movement of tectonic plates.
What is the main evidence that supports the geologic time scale?
Measured rates of erosion.
What evidence supports the theory of plate tectonics?
The shape of the continents, the distribution of earthquakes, the symmetric magnetic banding of the sea floor ether side of the mid oceanic ridges, the mid oceanic ridges, back arc basins, deep sea trenches, the fiery ring of the Pacific, The distribution and chemistry of volcanoes, atolls, paleo magnetism, fossil evidence and the distribution of species. (there may be more evidence).
What layer supports the existence of life?
the troposphere supports the life.
What evidence supports the conclusion that Earth has a hot core?
One could even theorize that the enormous weight of all the soil and rock of the layers of the earth would create such great friction that a tremendous amount of heat would be the result. Melting all the matter of the earth's core. The eruption of a volcano could be evidence of this "melted earth" eventually spewing to the surface, once the built up steam and pressure of this phenomenon is finally released.
What evidence in rocks supports the theory seafloor spreading?
Convergence supports the theory of seafloor spreading. Samples of the deep ocean floor are evidence of seafloor spreading because the basaltic oceanic crust and overlapping sediment become younger as the mid-ocean ridge is approached. Also, the rock that makes up the floor of the ocean is younger than the continents.
What evidence in rock supports the theory of seafloor spreading?
Convergence supports the theory of seafloor spreading. Samples of the deep ocean floor are evidence of seafloor spreading because the basaltic oceanic crust and overlapping sediment become younger as the mid-ocean ridge is approached. Also, the rock that makes up the floor of the ocean is younger than the continents.
How do the ages of the rocks on the seafloor support the theory of seafloor spreading?
The ages of the rocks become older the farther the way they are from the ridges. The closer they are the younger it is. This leaves evidence to the seafloor spreading theory.
How does the age of rocks in the seafloor provide evidence of seafloor spreading?
The age of rocks gets progressively younger as you move away from the mid-ocean ridges, where seafloor spreading occurs. This supports the theory of seafloor spreading, as new crust is being formed at the ridges and then moves away from them over time. This process leaves a record of older rocks further from the ridges and younger rocks closer to them.
How does seafoor age and magnetic clues support seafloor spreading?
Seafloor is youngest near the mid-ocean ridges and gets progressively older as you move away from the ridge. Magnetic stripes on the seafloor provide evidence of seafloor spreading, as they show alternating patterns of normal and reversed magnetic polarity that match the Earth's magnetic reversals over time. This supports the theory of seafloor spreading as new oceanic crust is created at the mid-ocean ridge and spreads outward.
How the evidence from a data table supports a hypothesis?
The evidence from a data table supports a hypotheis is i dont know.
What three pieces of evidence did Harry Hess gather to prove that seafloor spreading was taking place?
Magnetic stripes on the seafloor showed alternating patterns of normal and reversed polarity, matching Earth's magnetic field reversals. Age dating of seafloor rocks revealed that rocks were youngest along mid-ocean ridges and oldest near continental margins. Sediment thickness on the seafloor was thinnest at mid-ocean ridges and thickest near the continents, supporting the idea of seafloor spreading.
What is the circumstantial evidence that supports the hypothesis that high fructose corn syrup is harmful to humans?
The circumstantial evidence that supports that hypothesis that high fructose corn syrup is harmful to humans is the fact that obesity is so high. The instances of diabetes is another piece of circumstantial evidence that supports this.
Explain how an isochron map of the ocean floor supports the theory of seafloor spreading?
An isochron is a line on a map that connects points that have the same age. An isochron map of the ocean floor supports the theory of seafloor spreading because it shows the older rock near the deep sea trenches and the younger rocks near ocean ridges.
What evidence supports the hypothesis that whales were land dwelling mammals?
they had hip bones
How does seafloor spreading support continental drift?
Seafloor spreading occurs at mid-ocean ridges where new oceanic crust is formed and spreads away from the ridge. This process provides evidence for continental drift as it shows that the oceanic crust is younger near the ridges and gets progressively older farther away. This supports the idea that continents were once connected and have since moved apart.
Explain how ocean-floor rocks and sediments are evidence of seafloor spreading?
Ocean-floor rocks and sediments show a pattern of symmetric age distribution, with younger rocks near mid-ocean ridges and older rocks farther away. This supports the theory of seafloor spreading, where new oceanic crust is created at mid-ocean ridges and spreads away from them. As the crust moves, it picks up and records the magnetic signature of Earth's magnetic field, creating alternating magnetic stripes that are evidence of seafloor spreading.
