Paleomagnetisms

Part of speech: noun

Definitions

1. A branch of geophysics studying the magnetic fields preserved in rocks, sediments, and archaeological artifacts over geological time
2. The scientific analysis of ancient magnetic fields recorded in geological materials, which helps reconstruct the history of Earth’s magnetic pole movements
3. The examination of the remnant magnetism in various types of rocks and sediments to understand past geological and environmental conditions

Etymology: Paleomagnetism is a compound built from two older pieces: "paleo-", from the Ancient Greek "palaios" meaning "old" or "ancient," and "magnetism," which traces back to Magnesia, a region in ancient Greece whose lodestone (naturally magnetised rock) gave the word "magnet" its name. Put together, the term literally means "ancient magnetism," the faint magnetic record that rocks preserved from the time they formed. The word is a modern technical coinage, built in English from classical elements rather than inherited from ancient writers. Its first element, "paleo-," is a combining form used widely in scientific compounds, so the term was assembled to describe a specific field of study rather than emerging from everyday speech. "Paleomagnetisms" is simply the plural of "paleomagnetism," used when referring to several distinct studies or types of this kind of investigation.