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geologic time

American  

noun

  1. the succession of eras, periods, and epochs as considered in historical geology.


geologic time Scientific  
/ jē′ə-lŏjĭk /
  1. The period of time covering the formation and development of the Earth, from about 4.6 billion years ago to today.


Etymology

Origin of geologic time

First recorded in 1860–65

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

“Glaciers are leaving geologic time and are vanishing in the span of a human lifetime, which is unprecedented,” he says.

From Los Angeles Times Aug. 13, 2026

"The vast number of fossil whale falls documented, including a new species of beaked whale, is truly amazing and is of major importance to understanding whale evolution and whale distributions over geologic time," he said.

From Barron's Jun. 10, 2026

Comparing the two examples of the same bone with the same unique features from the same geologic time zone supports their identifications.

From Science Daily Apr. 17, 2024

In the geologic time scale, humans barely exist for the span of a breath and, for most of us, that's just long enough to be born into a cruel world and suffer its grief.

From Salon Aug. 27, 2023

If you had been looking for a very long, geologic time, you could have seen the continents them- selves in motion, drifting apart on their crustal plates, held afloat by the fire beneath.

From "The Lives of a Cell" by Lewis Thomas

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