seafloor spreading and magnetic striping -- Britannica Online Encyclopedia

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Sea oor spreading and magnetic
striping
Rising magma assumes the polarity of
Earth's geomagnetic eld before it
solidi es into oceanic crust. At
spreading centres, this crust is
separated into parallel bands of rock by
successive waves of emergent magma.
When Earth's geomagnetic eld
undergoes a reversal, the change in
polarity is recorded in the magma,
which contributes to the alternating
pattern of magnetic striping on the
sea oor.
Encyclopædia Britannica, Inc.
CITATION INFORMATION
IMAGE TITLE: sea oor spreading and magnetic striping
MEDIA TYPE: Image
WEBSITE NAME: Encyclopaedia Britannica
PUBLISHER: Encyclopaedia Britannica, Inc.
URL: https://www.britannica.com/science/sea oorspreading/media/530828/155524
ACCESS DATE: March 05, 2019
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