0
On a map of the seafloor the boundaries between normally magnetized oceanic crust and reversely magnetized oceanic crust are called?
Wiki User
∙ 13y ago
isochrons
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
Which type of boundaries is seafloor created by?
Seafloor is created at divergent plate boundaries called the mid-ocean ridges.
What boundary creates seafloor spreading?
A divergent boundary creates seafloor spreading. At these boundaries, tectonic plates move apart, allowing magma to rise from below the Earth's surface and create new crust at the mid-ocean ridges.
Are all plate boundaries located along the margins of continents?
No. Many plate boundaries are on the seafloor far from continents and several are well within continents.
What are underwater mountains found at divergent plate boundaries were the seafloor spreads apart?
a underwater mountain
Describe how magnetism is used to support the theory of seafloor spreading?
New material is added to the sea floor when sea floor spreading occurs. When the iron cools it is magnetized by the magnetic field of the earth.
Where does seafloor spreading happen?
along plate boundaries
Which type of boundaries is seafloor created by?
Seafloor is created at divergent plate boundaries called the mid-ocean ridges.
Where are most divergent boundaries found?
On the seafloor. Yes, the mid oceanic ridges are all divergent boundaries.
What boundary creates seafloor spreading?
A divergent boundary creates seafloor spreading. At these boundaries, tectonic plates move apart, allowing magma to rise from below the Earth's surface and create new crust at the mid-ocean ridges.
Are all plate boundaries located along the margins of continents?
No. Many plate boundaries are on the seafloor far from continents and several are well within continents.
What occurs at divergent boundaries and creates new seafloor?
At divergent plate boundaries the spreading of the tectonic plates results in the reduced pressure of the underlying magma. As the spreading continues, lava fills in the area of spreading and cools, becoming the newest addition to the seafloor. This process occurs at a steady rate ranging from a few centimeters to several centimeters of new sea floor each year. However, at a different location opposite the newly formed seafloor are convergent plate boundaries where land and seafloor is destroyed to make room for new seafloor.
What are underwater mountains found at divergent plate boundaries were the seafloor spreads apart?
a underwater mountain
What are magnetic stripes on the seafloor?
Magnetic stripes on the seafloor are alternating bands of magnetized rock that form parallel to mid-ocean ridges. These stripes are a result of Earth's magnetic field changing direction over time and getting preserved in the rocks as they cool and solidify. They provide evidence for seafloor spreading and plate tectonics.
What type of plate boundaries should the students study in order to understand seafloor spreading?
plate tectonics
Does the theory of plate tectonics contain both seafloor spreading and continental drift?
Yes. The theory of plate tectonics is very broad, and it covers seafloor spreading, continental drift, plate boundaries and so on.
How do magnetic bands provide evidence that tectonic plates are moving apart at mid-oceanic ridges?
Magnetic bands provide evidence of seafloor spreading at mid-oceanic ridges because Earth's magnetic field periodically reverses. As new seafloor forms at the ridge and cools, magnetic minerals in the rocks align with the prevailing magnetic field. This creates a pattern of magnetic stripes on either side of the ridge that reflects the history of Earth's magnetic field reversals and the process of seafloor spreading.
In the process of sea-floor spreading what happens when magma rises to Earth's surface and solidifies?
Yes. Seafloor spreading is the term given to the creation of new seafloor at divergent boundaries. At a divergent boundary, two oceanic plates move apart, which obviously means that something must then surface to fill the void. This is where the magma rises from the Earth's interior and cools to become seafloor. On the other end, at convergent boundaries, the old seafloor is forced under the continental plates, where it is recycled back into the Earth's magma supply.
