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Plate tectonics and the ocean floor quizlet.
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Ocean trenches form where a plate with a leading edge of oceanic lithosphere collides with another plate.
A mid ocean ridge or mid oceanic ridge is an underwater mountain range formed by plate tectonics.
9th 12th grade.
Composed of either continental or continental and oceanic lithosphere significantly more plastic than the rigid asthenosphere atop which they float.
The ocean floor had tracks from the continents.
Earth s magnetic field.
Why was the mapping of the ocean floor such an important step in the development of plate tectonic theory.
According to the theory of plate tectonics the plates are moved by the creation of new crust and the subduction of old crust.
The concept of plate tectonics was formulated in the 1960s.
Plate tectonics from the late latin.
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The features mapped on the ocean floor disproved continental drift.
Pertaining to building is a scientific theory describing the large scale motion of seven large plates and the movements of a larger number of smaller plates of earth s lithosphere since tectonic processes began on earth between 3 3 and 3 5 billion years ago.
Linked pieces of lithosphere which float atop the asthenosphere.
The process by which the ocean floor sinks beneath a deep ocean trench and back into the mantle is known as answer choices.
Nobody had known how deep the oceans were.
According to the theory earth has a rigid outer layer known as the lithosphere which is typically about 100 km 60 miles thick and overlies a plastic moldable partially molten layer called the asthenosphere the lithosphere is broken up into seven very large continental and ocean sized plates six or seven medium sized regional.
This uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the.
Most plate boundaries are under the ocean.
In these situations an oceanic plate normally subducts into the mantle forming a topographic low on the ocean floor.