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 Those spikes commemorate new geologic time periods across the Earth. Seth Borenstein, Los Angeles Times, 11 July 2023 The vote brought an end to a debate about whether to declare that our species had transformed the natural world so thoroughly since the 1950s as to have sent the planet into a new epoch of geologic time. Christopher Flavelle Ian C. Bates, New York Times, 2 Apr. 2024 Defining the Anthropocene as this specific chunk of geologic time would limit the usefulness of the term, Ellis says. Jonathan Lambert, NPR, 29 Mar. 2024 The current period of geologic time is the Holocene epoch, which began 11,700 years ago. Will Sullivan, Smithsonian Magazine, 6 Mar. 2024 After Ernest Rutherford first suggested using the decay of radioactive elements to measure geologic time, the Geologic Time Scale began to change. Erik Klemetti, Discover Magazine, 7 Mar. 2024 Still, to qualify for its own entry on the geologic time scale, the Anthropocene would have to be defined in a very particular way, one that would meet the needs of geologists and not necessarily those of the anthropologists, artists and others who are already using the term. Raymond Zhong, New York Times, 5 Mar. 2024 Ezcurra said that three pieces of information were necessary to do this: knowing where each species fits on the evolutionary tree, the geographic location of the species as indicated by fossil discoveries, and its place in geologic time. Jeanne Timmons, Ars Technica, 16 Aug. 2023 That meteorite started a whole new era, scientists propose humans started a new epoch which is a much smaller geologic time period. Seth Borenstein, Los Angeles Times, 11 July 2023

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'geologic time.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1861, in the meaning defined above

Time Traveler
The first known use of geologic time was in 1861

Dictionary Entries Near geologic time

Cite this Entry

“Geologic time.” Dictionary, Merriam-Webster, Accessed 24 Apr. 2024.

Kids Definition

geologic time

: the long period of time marked by events in the earth's geological history
geologic time table

More from Merriam-Webster on geologic time

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