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Deep ocean trenches were found near some of the continental landmasses, particularly around the edges of the Pacific. It turned out that some of the deepest parts of the ocean are actually near some of the continents, and out in the middle of the oceans the water is relatively shallow because of the underwater mountains. Volcanic activity and lots of heat were discovered near the underwater mountains. With this new information, H. H. Hess, an American geologist, presented the hypothesis of seafloor spreading.
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How is pillow lava evidence of sea-floor spreading?
Pillow lava forms when molten lava erupts underwater and cools rapidly, creating characteristic pillow-like structures. This type of lava is commonly found along mid-ocean ridges, which are areas where sea-floor spreading occurs. The presence of pillow lava on the ocean floor is evidence of volcanic activity associated with sea-floor spreading.
Strips of alternating magnetic polarities found in rocks in the ocean basin?
provide evidence for sea-floor spreading
Why did arthur Holmes think the sea floor was spreading?
Spreading Of ocean floor
What is one piece of evidence that supports sea floor spreading?
Mapping of magnetic anomalies on the ocean floor shows alternating bands of normal and reversed polarity, indicating that new oceanic crust is continuously forming at mid-ocean ridges and spreading away in opposite directions.
Is the analysis of seafoor sediments evidence of sea-floor spreading?
Not really but sea floor sediments thickness increase with increased distance from spreading centers which is good evidence. Other evidence such as magnetic reversals, temperature, dating methods provide the best evidence of seafloor spreading
What is sea floor spreading and what evidence do we have to prove it is happening?
Magnetic minerals on the ocean floor.
How sea floor spreading provide evidence for tectonic plates?
by the plate tectonic and the ocean bridges
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.
What is a spreading center on the ocean floor?
sea floor-spreading..;)
What three pieces of evidence for Wegener's theory came from the sea floor?
seafloor spreading, age of the sea floor and ocean trenches.
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.
How is pillow lava evidence of sea-floor spreading?
Pillow lava forms when molten lava erupts underwater and cools rapidly, creating characteristic pillow-like structures. This type of lava is commonly found along mid-ocean ridges, which are areas where sea-floor spreading occurs. The presence of pillow lava on the ocean floor is evidence of volcanic activity associated with sea-floor spreading.
How do rocks along central valley of mid ocean ridge provide evidence of sea floor spreading?
because
Strips of alternating magnetic polarities found in rocks in the ocean basin?
provide evidence for sea-floor spreading
Why did arthur Holmes think the sea floor was spreading?
Spreading Of ocean floor
How is lava evidence of sea floor spreading?
Evidence shows that molten material erupts through this valley. The material then hardens to form the rock of the ocean floor.-Answered by Nadezda Dimsoski
How are ocean-floor rocks and sediments evidence of seafloor spreading?
Ocean-floor rocks near mid-ocean ridges show a symmetrical pattern of magnetized stripes parallel to the ridge axis. These stripes result from periodic reversals in Earth's magnetic field and provide evidence of seafloor spreading. Sediments on the ocean floor also show younger ages near the ridges, supporting the idea of seafloor spreading.
