Related articles:
Dynamo theory
Magnetic field
South Atlantic Anomaly
North Magnetic Pole
Oceanic crust
Ferromagnetism
Seafloor spreading
Plate tectonics
Key terms:
reversals
past
magnetic field
geomagnetic
rocks
ocean
occur
million years
observed
polarity
cretaceous
solar
vine
orientation
morley
geological
ridge
frequency
sea floor
volcanic
mantle
processes
intensity
decline
geomagnetic reversals
decades
variations
lawrence
drummond
matthews
continental
spontaneous
field reversal
anomalies
more than
million years ago
explanation
long period
ocean floor
sedimentary
dipole field
these events
jurassic quiet
field strength
became apparent
magnetic stripes
cretaceous long normal
geomagnetic field
seafloor spreading
because the magnetic field
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