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POLARITY CHRON [1 record]

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Record 1 1991-04-05

English

Subject field(s)
  • Geology
  • Chronology
DEF

The fundamental unit of geologic time designating the time span of a polarity chronozone. It is the polarity-chronologic unit of middle rank, between polarity superchron and polarity subchron.

OBS

The term "polarity epoch" may also designate another concept, the period of time during which the Earth's magnetic field was predominantly or entirely of one polarity.

French

Domaine(s)
  • Géologie
  • Chronologie
CONT

Le chron polaire est l'unité [polaro-géochronologique] de base qui correspond à l'intervalle de temps géologique représenté par une chronozone polaire.

Spanish

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