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The three are different. The first is Molten Material,which is indeed erupting along mid-ocean ridges. The scientists dived to the ocean floor in Alvin, a small sumbarine. Alvin was built to withstand the crushing pressures four kilometers down in the ocean. A ridge's central valley, Alvin's crew found strange rocks shaped like pillows. Other rocks looked like toothpaste squeezed from a tube. Such rocks form only when molten material hardens quickly under again and again along the mid-ocean ridges.
The second is Magnetic Stripes, which are patterns of the ocean floor that provided more support for sea-floor spreading. Earth's magnetic poles have reversed themselves many times during Earth's history. The last reversal happened 780,000 years ago.
The third and final one is Drilling Samples, which came from rock samples obtained by drilling into the ocean floor. The Glomar Challenger, a drilling ship built in 1968, gathered the samples. The Glomar Challenger sent drilling pipes through water six kilometers deep to drill holes in the ocean floor. This feat has been compared to digging a hole into the sidewalk from the top of the Empire State Building.
Information from: California Earth Science Textbook, pages 152-153.
Hope this helps! ☺
-SmallvilleGrl
Evidence of sea floor spreading includes the presence of mid-ocean ridges, magnetic stripes in the ocean floor that parallel these ridges, and the age of the rock samples obtained from the sea floor, which gets progressively younger as it gets farther from the ridges. These observations support the theory of plate tectonics and the continuous movement of the Earth's lithosphere.
Molten rock at mid-ocean ridges has magnetized minerals that align with Earth's magnetic field. When the Earth's magnetic field reverses, the magnetized minerals align in the opposite direction. The record of magnetic reversals is carried away from each side of the spreading center of a mid-ocean ridge, showing that the molten rock is creating new lithosphere.
Because it leaves ridges so that means something is going to grow like how volcanoes grow
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Which was not included in the support for harry hess's hypothesis sea floor spreading?
Granitic strips in the ocean floor ... Novanet
Bands of magnetic material in the sea floor that have opposite poles or exhibit magnetic reversal can provide evidence for sea floor spreading true or false?
True. Bands of magnetic material in the sea floor that have opposite poles or exhibit magnetic reversal provide evidence for sea floor spreading. This is because as new oceanic crust forms at mid-ocean ridges, Earth's magnetic field periodically reverses, creating magnetic stripes on the ocean floor that align with the direction of the magnetic field at that time.
How do ocean ridges and deep-sea trenches support the theory of sea floor spreading?
Ocean ridges and deep-sea trenches support the theory of sea floor spreading through the process of plate tectonics. At ocean ridges, new oceanic crust is formed as magma rises and solidifies, pushing the existing crust apart. Deep-sea trenches are areas where old oceanic crust is being subducted back into the mantle, completing the cycle of sea floor spreading. This continuous movement of crust at ridges and trenches provides evidence for the theory of sea floor spreading and the movement of tectonic plates.
How are earthquake patterns used to provide evidence of sea floor spreading?
Earthquake patterns, including their depth and distribution, can provide evidence of sea floor spreading by showing a concentration of earthquakes along mid-ocean ridges where new oceanic crust is being formed. As tectonic plates diverge and new crust is created, stress builds up and is released through earthquakes. The pattern of earthquakes along mid-ocean ridges provides a visual representation of the tectonic activity associated with sea floor spreading.
What three types of evidence provided support for the theory of sea-floor spreading?
The discovery of mid-ocean ridges, where new oceanic crust is formed, supported the theory of sea-floor spreading. The mapping of magnetic stripes on the ocean floor, showing alternating patterns of magnetic polarity, provided further evidence for sea-floor spreading. The age of the oceanic crust getting progressively younger away from the mid-ocean ridges supported the concept of sea-floor spreading.
Is the analysis of seafoor sediments evidence of sea-floor spreading?
Yes, the analysis of sea-floor sediments can provide evidence of sea-floor spreading. By studying the age and composition of the sediments, scientists can track the movement of tectonic plates and the spreading of the sea floor over time. Additionally, magnetic anomalies recorded in these sediments can further support the theory of sea-floor spreading.
What is used as evidence for sea floor spreading?
Magnetic reversals
What is sea floor spreading and what evidence do we have to prove it is happening?
Magnetic minerals on the ocean floor.
How magnetic reversals provide evidence for sea floor spreading?
Because of the stripes at the sea floor which are magnetic minerals
What is magnetic striping evidence?
Magnetic reversals and sea floor spreading.
What Magnetic striping evidence of?
Magnetic reversals and sea floor spreading.
What is magnetic striping evidence of?
Magnetic reversals and sea floor spreading.
What provides the most evidence for the theory of plates tectonic?
The spreading of the sea floor.
What three pieces of evidence for Wegener's theory came from the sea floor?
seafloor spreading, age of the sea floor and ocean trenches.
How did molten material show evidence of sea floor spreading?
It just did, you could see it
How is drilling samples evidence of sea floor spreading?
Because people love cats
How sea floor spreading provide evidence for tectonic plates?
by the plate tectonic and the ocean bridges
