Hadean time

proper noun

The geologic eon from about 4,600 to 3,800 million years ago, marked by the formation of the first rocks.

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Hadean
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Meanings

proper noun
  1. geographyThe geologic eon from about 4,600 to 3,800 million years ago, marked by the formation of the first rocks.

    It may be that erosion or metamorphism destroyed traces of Hadean life, or that Hadean time preceded the evolution of life. In any case, Hadean time is not amenable to subdivision based on fossils.

    1998, Graham R. Thompson, Jonathan Turk, Introduction to Physical Geology, page 150

    Synonyms: Hadean

Synonyms & antonyms

proper nounThe geologic eon from about 4,600 to 3,800 million years ago, marked by the formation of the first rocks.

Similar
Hadean
Cite this entry
APA

Hadean time. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/Hadean%20time

MLA

“Hadean time.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Hadean%20time. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “Hadean time,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/Hadean%20time.

Source: Hadean time on Wiktionary, CC BY-SA 4.0.