Dictionary.com
definitions
  • synonyms

paleomagnetism

[pey-lee-oh-mag-ni-tiz-uh m or, esp. British, pal-ee-]
See more synonyms on Thesaurus.com
noun
  1. Geology. magnetic polarization acquired by the minerals in a rock at the time the rock was deposited or solidified.
Show More

Origin of paleomagnetism

First recorded in 1850–55; paleo- + magnetism
Related formspa·le·o·mag·net·ic [pey-lee-oh-mag-net-ik or, esp. British, pal-ee-] /ˌpeɪ li oʊ mægˈnɛt ɪk or, esp. British, ˌpæl i-/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

paleomagnetism in Science

paleomagnetism

[pā′lē-ō-măgnĭ-tĭz′əm]
  1. The fixed orientation of a rock's magnetic minerals as originally aligned at the time of the rock's formation. Paleomagnetism is usually the result of thermoremanent magnetization (magnetization that occurs in igneous rocks as they cool). Examination of the paleomagnetism of the Earth's ocean floors revolutionized the field of geology by providing evidence for the existence and movement of tectonic plates. See Note at magnetic reversal.
  2. The scientific study of such magnetic remanence.
Show More
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.