geologic time

noun

Definition of geologic time 

: the long period of time occupied by the earth's geologic history

geologic time table

Examples of geologic time in a Sentence

Recent Examples on the Web

These new divisions of geologic time will likely bring some order and clarity to an era defined by monumental change, but not all scientists agree that the new ages are the best way to reclassify recent history. Avery Thompson, Popular Mechanics, "According to Geologists, We're Living In a New Age," 18 July 2018 At its core lay the realization battered into him on his first journey down the Colorado about humanity’s impermanence in the face of geologic time and how the Earth remained in a continual state of flux. Johnforristerross, Longreads, "Taming the Great American Desert," 2 July 2018 So, what’s been altering Earth’s days over geologic time, and does this mean anything for solstices past and future? Chris J. Ratcliffe, National Geographic, "This Summer Solstice, Earth's Days Are Longer Than Ever," 20 June 2018 In just 10,000 years—an eyeblink of geologic time—temperatures shot up by as much as eight degrees Celsius, according to paleoclimate data. Marta Zaraska, Scientific American, "How Global Warming Is Shrinking Earth's Animals," 21 May 2018 In just 10,000 years—an eyeblink of geologic time—temperatures shot up by as much as eight degrees Celsius, according to paleoclimate data. Marta Zaraska, Scientific American, "How Global Warming Is Shrinking Earth's Animals," 21 May 2018 In just 10,000 years—an eyeblink of geologic time—temperatures shot up by as much as eight degrees Celsius, according to paleoclimate data. Marta Zaraska, Scientific American, "How Global Warming Is Shrinking the Earth's Animals," 15 May 2018 Over geologic time, Earth’s CO2 is regulated by the balance between volcanic outgassing, which adds CO2 to the atmosphere, and CO2 removal by chemical weathering of rocks. Scott Denning, Washington Post, "May the 4th be with Earth, a perfect planet that’s not too Hoth or Tatooine," 4 May 2018 And if indeed some such culture arose on Earth in the murky depths of geologic time, how might scientists today discern signs of that incredible development? Steven Ashley, Scientific American, "Could an Industrial Prehuman Civilization Have Existed on Earth Before Ours?," 23 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'geologic time.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of geologic time

1861, in the meaning defined above

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Last Updated

16 Nov 2018

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The first known use of geologic time was in 1861

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