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What is the study of the magnetic record preserved in Earth's rocks called?
Wiki User
∙ 11y ago
paleomagnetism
Wiki User
∙ 13y ago
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What is most likely to have a well-preserved fossil record?
Forams
How could an old magnetic field be preserved in rocks?
Because lava can melt iron (demagnetizing it) and when it solidifies, it will pick up whatever magnet field it is currently subject to, thus locking in a record of the magnet field at the time in history.
What is a record that is preserved in the sequence of lava flows at oceanic ridges?
paleomagnetism
What are the preserved remains of living organisms arranged by age?
fossil or fossil record hope this helps -sj
Why do magnetic stripes appear on the seefloor?
The seafloor spreads apart, creating new rocks that record magnetic orientation. Small grains of magnetite on the volcanic basalt (ocean floor) have magnetic properties.
What is a gap in the geological record preserved in rock called?
A gap in the geological record in a body of rock is called an unconformity.
How do rocks record changes in earths magnetic field?
Rocks which are liquid (lava) have their magnetic particles aligned to the local magnetic field as they cool and solidify. The rocks can be dated by the radioactive decay processes. If there is a new layer of rock (lava) laid down over this same deposit and the magnetic filed has altered, the new rock will have a different imposted magnetic field and age than the older rock.
What is the magnetic coated ribbon of plastic housed in a cartridge?
it was called tape. used by ancient people to record music.
How often do you miss deadliness?
never as preserved in my record mails
What is most likely to have a well-preserved fossil record?
Forams
How can scientists tell if the earths magnetic field has changed?
Sediment cores taken from deep ocean floors tell scientists about magnetic polarity shifts which provides a direct link between magnetic field activity and the fossil record . The Earth's magnetic field determines the magnetization of lava as it is laid down on the ocean floor on either side of the Mid-Atlantic Rift where the North American and European continental plates are spreading apart . When the lava solidifies it then creates a record of the orientation of past magnetic fields much like a tape recorder records sound .
How could an old magnetic field be preserved in rocks?
Because lava can melt iron (demagnetizing it) and when it solidifies, it will pick up whatever magnet field it is currently subject to, thus locking in a record of the magnet field at the time in history.
What is a record that is preserved in the sequence of lava flows at oceanic ridges?
paleomagnetism
What are the B5 brothers are up to now?
They have changed their name to Audio and have moved to a new record label. The record label is UpFront Records and they have a new single called Magnetic ft. Akon.
What are devices that record the motion of the earths crust?
seismograph
What is the definition of 'record'?
record # ## An account, as of information or facts, set down especially in writing as a means of preserving knowledge. ## Something on which such an account is based. ## Something that records: a fossil record. # Information or data on a particular subject collected and preserved: the coldest day on record. # The known history of performance, activities, or achievement: your academic record; hampered by a police record. # An unsurpassed measurement: a world record in weightlifting; a record for cold weather. # Computer Science. A collection of related, often adjacent items of data, treated as a unit. # Law. ## An account officially written and preserved as evidence or testimony. ## An account of judicial or legislative proceedings written and preserved as evidence. ## The documents or volumes containing such evidence. # ## A disk designed to be played on a phonograph. ## Something, such as magnetic tape, on which sound or visual images have been recorded. idioms: go on record # To embrace a certain position publicly: go on record in favor of the mayor's reelection.off the record # Not for publication: The senator told the reporters that his remarks were strictly off the record. on record # Known to have been stated or to have taken a certain position: The senator's opposition to the new legislation is on record.
What techique is used to study ancient magnetic fields?
Paleomagnetism refers to the study of the record of the Earth's magnetic field preserved in various rocks and minerals through time.The study of paleomagnetism is possible because iron-bearing minerals such as magnetite may record past directions of the Earth's magnetic field when the rocks containing them were formed or last heated up.Paleomagnetic signatures in rocks can be recorded by three different mechanisms:-First, iron-titanium oxide minerals in basalt and other igneous rocks may preserve the direction of the Earth's magnetic field when the rocks cool through the "Curie temperature" for those minerals. (The Curie temperature of magnetite, is about 580°C).In a completely different process, magnetic grains in sediments may align with the magnetic field during or soon after deposition.In a third process, magnetic grains may be deposited from a circulating solution, or be formed during chemical reactions, and may record the direction of the magnetic field at the time of the mineral's formation.
