The ages of the rock confirms that the cause of sea-floor spreading is two oceanic plates diverging from one another allowing volcanic activity and “new” igneous rock to form at the ridge. These are the primary pieces of evidence used to support the theory today.
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What evidence supports the theory of the seafloor spreading?
Seismic studies. More proof for sea floor spreading comes from seismic studies indicating that earthquakes occur along the rift valley of a midoceanic ridge and the crossâcutting fractures that offset it.
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What are 3 evidences for seafloor spreading?
Seafloor spreading produces major characteristics of the seafloor – 1) the age of the seafloor is progressively older away from midocean ridges, 2) the elevation of the seafloor is progressively lower away from midocean ridges, 3) the magnetic history of the seafloor bears the striped-pattern of the Earth’s magnetic …
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What evidence supported the theory of seafloor spreading quizlet?
What three types of evidence provided support for the theory of sea floor spreading? eruptions of molten material, magnetic stripes in the rock of the ocean floor, and the ages of the rocks themselves.
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What is the most convincing evidence of seafloor spreading?
The theory of seafloor spreading states that new ocean crust is continually being formed, and that this crust is slowly carried away from its point of origin over a period of time. The study of the repeated reversal of the Earth’s magnetic poles over time has provided convincing evidence of seafloor spreading.
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Which is 1 piece of evidence of seafloor spreading?
One piece of evidence leading to the identification of seafloor spreading was that the oldest rocks on the ocean floor were found near the continents and the youngest were found near the ocean ridges.
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What evidence did scientist find for seafloor spreading in the 1960s?
In the early 1960s, dating of ocean-core samples showed that the ocean floor was younger at the Mid-Atlantic Ridge but progressively older in either direction, confirming the reality of seafloor spreading.
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What is the evidence of plate movement seafloor spreading theory?
Scientists discovered that as they moved away from the mid-ocean ridge, the samples of both the crustal rock and sediments on the ocean floor increased in age. The newest, youngest rock was closest to the mid-ocean ridge. This evidence supported the theory of seafloor spreading.
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What is the evidence that supports the theory of seafloor spreading?
Scientists discovered that as they moved away from the mid-ocean ridge, the samples of both the crustal rock and sediments on the ocean floor increased in age. The newest, youngest rock was closest to the mid-ocean ridge. This evidence supported the theory of seafloor spreading.
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What are 3 evidences for seafloor spreading?
Seafloor spreading produces major characteristics of the seafloor – 1) the age of the seafloor is progressively older away from midocean ridges, 2) the elevation of the seafloor is progressively lower away from midocean ridges, 3) the magnetic history of the seafloor bears the striped-pattern of the Earth’s magnetic …
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