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Who were the scientists who first studied (comprehensively) magnetic striping in oceanic crust?
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What type of boundaries are subduction zones associated with?
Convergent oceanic - continental and oceanic - oceanic boundaries.
Which type of plate is denser continental or oceanic?
oceanic as it is colder; therefore denser
What happens when an oceanic plate collides with a continental plate?
when oceanic crust and continental crust collide, the oceanic crust sinks down beneath the continental crust. this is called subduction.
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).
Why does the Earth's size remains the same despite of what is happening at the mid-oceanic ridge?
An equal amount of oceanic crust is being subducted at the convergent plate boundaries as is being created at the mid-oceanic ridge.
What struture on the seafloor would have magnetic striping?
The Mid Ocean Ridge would have magnetic striping. As the seafloor expands, new oceanic crust is spread in either direction. As this process continues over many years, the magnetic poles may switch, altering the magnetism in the new crust. The poles will switch back and forth, producing the magnetic striping that is easily discernible when examining the Mid Ocean Ridge and surrounding seafloor.
Why does magnetic striping happen?
The plate tectonics based theory ha a three pronged aproach; both the zebra-like magnetic striping and the construction of the mid-ocean ridge system, the seafloor spreading hypothesis (SFS) quickly gained converts and represented another major advance in the development of the plate-tectonics theory. Furthermore, the oceanic crust now came to be appreciated as a natural "tape recording" of the history of the geomagnetic field reversals (GMFR) of the Earth's magnetic field. Nowadays, extensive studies are dedicated to the calibration of the normal-reversal patterns in the oceanic crust on one hand and known timescales derived from the dating of basalt layers in sedimentary sequences (magnetostratigraphy) on the other, to arrive at estimates of past spreading rates and plate reconstructions.
Is there magnetic strips on the ocean floor are places where oceanic crust sink back to the mantle?
Is there magnetic stripe son the ocean floor are places where oceanic crust sink back to the mantle
What causes Magnetic stripes on the seafloor are caused by?
These "stripes" formed the pattern known as magnetic striping. ... They hypothesized that the magnetic striping was produced from the generation of magma at mid-ocean ridges during alternating periods of normal and reversed magnetism by the magnetic reversals of the Earth's magnetic field.
Why is paleomagnetism important?
Paleomagnetism is an important tool used to unravel Earth's past movements of tectonic plates. By studying the magnetic fields left in rocks, scientists have learned how the continental and oceanic plates have moved in history.
Which evidence causes most scientists to believe that seafloor spreading occurs at the mid-atlantic ridge?
Oceanic crust on both sides ofthe ridge shows matching patterns of reversed and normal magnetic polarity
How do magnetic bands provide evidence that tectonic plates are moving apart at mid-oceanic ridges?
Through seafloor-spreading as iron rich minerals cool they become magnetized in the direction parallel to the existing magnetic field. As the magnetic fields change direction so will the magnetized minerals, allowing scientists to record each change in the seafloor as it spreads.
What do scientists use to measure the rate of movement of oceanic plates?
sea-floor spreading
What is the average age of oceanic crust?
The oceanic crust is the outermost layer of the lithosphere of the Earth. Scientists have estimated that its average age is around 200 million years.
Do magnetic stripes on the ocean floor oceanic crust sink back into the mantle?
Eventually the oceanic crust, along with the magnetically aligned minerals contained within, will be subducted into the mantle.
How is the oceanic crust recycled?
Convection in the mantle helps to recycle the oceaniccrust, not all of Earth's crust. There are two different parts to the crust. Oceanic and Continental. The Oceanic gets recycled, so when Scientists measure the age of the rocks, they're young.
True or false magnetic stripes on the ocean floor are places where oceanic crust sinks back to the mantle?
F
