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How is a record of magnetic reverals recorded in molten rock at mid ocean ridges?
Wiki User
∙ 14y ago
As basalt erupts from fissures and vents near the ridge tiny magnetic "domains"of iron-rich minerals like magnetite orient themselves with the magnetic field of the earth; just like little compass needles. When the lava cools the domains are locked in place thus recording the orientation of the magnetic field at the time they cooled.
Wiki User
∙ 14y ago
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How do records of magnetic reversals show that plates move apart?
As the molten material rises and cools, some magnetic minerals line up with the Earth's magnetic field. When the material hardens, the minerals are permanently fixed like tiny compass needles pointing north and south. Whenever the magnetic field reverses, the cooling minerals record the change.
Why was the golden record recorded?
shiney gold is cool
How magnets are used in recording?
Magnets are or rather were used to record audio or video on cassettes media earlier (which had/have magnetic tape in them on which data was recorded using magnet), which have now (still used) but taken over by optical media (CDs, DVDs, Blurays). Hard Disks/Drives in computer also use magnets to record on them.
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 the record high temperature in Saint Lucia?
The record high was 41.7º C recorded on February 22, 2004
Does the alluvial conglomerate rock record the magnetic field at the time the rock formed?
No. Magnetic fields are only recorded in rocks solidified from melt containing iron.
How do records of magnetic reversals show that plates move apart?
As the molten material rises and cools, some magnetic minerals line up with the Earth's magnetic field. When the material hardens, the minerals are permanently fixed like tiny compass needles pointing north and south. Whenever the magnetic field reverses, the cooling minerals record the change.
How do psychologist record brain activity?
Brain activity can be observed or recorded by means of MRI (Magnetic Resonance Imaging). This is much more likely to be done by a neurologist than by a psychologist.
How a prediction and then evidence of magnetism in rocks on the ocean floor proved that the seafloor spreads?
The Earth's magnetic reversals have been recorded in newly forming oceanic seafloor basalt by the orientation of magnetic minerals which become frozen in place as the magma hardens. When the next reversal occurs, it as well becomes part of the ocean floor magnetic record.
What is the participle of record?
Recorded.
What info is usually recorded on a patients graphic record?
Vital signs are usually recorded on a patient's graphic record.
What is the past tense for record?
The past tense of record is recorded.
What is the past participle of record?
Recorded.
What is the past tense word of record?
recorded"She recorded her biggest hits in 1970"
A record in which transactions are recorded first is what?
Journal
What are the uses of a magnetic tape?
Magenetic tape drives are obsolete. They were used to record data on the magnetic tapes.The data was accessed sequentially.
Who recorded the record Hey Mr Blue in the 60s?
The song Mr. blue was recorded by the Fleetwoods
