Definition of seafloor spreading in English:

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seafloor spreading

noun

Geology
The formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side.
Example sentences
  • After much thought, he proposed in 1960 that the movement of the continents was a result of sea-floor spreading.
  • The main figure demonstrates how sea-floor anomalies, also known as magnetic stripes, develop during sea-floor spreading.
  • The main figure demonstrates how sea-floor anomalies, also known as magnetic stripes, develop during sea-floor spreading.

For editors and proofreaders

Syllabification: seafloor spread·ing

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