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What concepts did magnetic striping reveal to scientists about the rock on either side of a spreading ridge?
Wiki User
∙ 16y ago
The pattern of magnetic striping on one side of the ridge was a mirror image of the striping on the other side of the ridge, indicating that the plates were moving equally in opposite directions, giving a plausible explanation for continental drift theory. Before this discovery, no evidence of a mechanism for plate tectonics existed. It was obvious after this discovery, that new crust was being created at the ridges.
Wiki User
∙ 16y ago
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Magnetic striping of evidence of?
Magnetic reversals and sea floor spreading.
What structure on the seafloor would have magnetic striping?
astherosphere
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.
How did scientists find out that rocks farther away from the mid-ocean ridges were older than those near it?
Radiometric dating. They sampled the basaltic rocks of the sea floor, and analyzed their radioisotope ratios. This produces an accurate age. They also measured the paleomagnetic striping on the sea floor, and have matched sea floor rock ages to those on land. The radioisotope dates are in good agreement with the measured rates of sea floor spreading. Currently, for example, the Atlantic Ocean is opening by a few inches per year. The Pacific sea floor is spreading even faster, but it is sucked beneath the American and Asian plate margins faster yet, creating orogeny (mountain building) particularly along the western edge of the north and south American plates. In other words, the Pacific Ocean is shrinking, even though its floor spreads a bit faster. This is expected to continue for another half billion years or so, and then reverse, in what is known as the Wilson cycle.
What facts support the theory of plate tectonics?
First and foremost we have measured the rate of continental drift using highly accurate GPS systems. The Indian subcontinent is gradually moving north, and the Americas continue drifting west at an inch or so per year. Second, the Hawaiian and Marshall Island seamounts drift off to the west of Hawaii, indicating sea floor spreading, as does paleomagnetic striping along the mid oceanic trenches. Of course, you want to know about continental drift, not sea floor spreading (which is related). The existence of convection currents within earth's molton mantle has been fairly well confirmed. More evidence consists of matching rock outcrops along the western coast of Africa and the eastern coast of south America, and elsewhere. One more piece of evidence consists of similar fossils on both continents dating back some 130 to 200 million years or so.
What is magnetic striping evidence?
Magnetic reversals and sea floor spreading.
What Magnetic striping evidence of?
Magnetic reversals and sea floor spreading.
Magnetic striping of evidence of?
Magnetic reversals and sea floor spreading.
What is magnetic striping evidence of?
Magnetic reversals and sea floor spreading.
Magnetic striping is evidence of?
pole reversals seafloor spreading
Magnetic striping is a part of?
Magma contains many materials which are magnetically affected. When this magma is ejected from the mantle and begins forming new crust, these materials align to the earth's magnetic field. The crust hardens, and the magnetic alignment is fixed (just as in normal magnets, made by using a similar process). The magnetic fields are 'visile' in strips of material, hence the term 'magnetic striping'. seafloor spreading
What causes the magnetic striping noticed about the mid ocean ridges?
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.
What structure on the seafloor would have magnetic striping?
astherosphere
How do rocks along the central valley of the mid ocean ridge provide evidence for sea floor spreading?
because the scientists found that the farther the rocks the older the rocks were. so the youngest rocks were found near the mid-ocean ridge. this showed that sea-floor spreading took place. +++ The primary evidence is "magnetic striping": remnant magnetising by the Earth's magnetic field of the iron compounds in the basalt forming the ocean floor. The magnetic traces are parallel to the spreading-ridges, and their polarity reflect the field's periodic reversal. The further from the ridge, the older the stripes. The rock is imprinted with the magnetism as it cools below a certain point in being eruped along the 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.
How was magnetic striping used to explain age of the seafloor?
it was use by watching porn
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.
