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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:

Beneath it lies the asthenosphere, a hotter and more ductile layer that slowly flows over geologic time.

From Science Daily Jun. 28, 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

Together, these remnants are helping scientists understand how fires have shaped and been shaped by environmental change through geologic time.

From New York Times May 10, 2024

In just over a century — the blink of an eye in geologic time — this land, and humans’ relationship with it, was transformed.

From Seattle Times Nov. 26, 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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