Noachian epoch

proper noun

The earliest of the Martian geologic epochs, approximately from 3,800 million years ago to 3,500 million years ago, marked by many large impact craters and followed by the Hesperian epoch.

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Meanings

proper nounthe Noachian epoch
  1. The earliest of the Martian geologic epochs, approximately from 3,800 million years ago to 3,500 million years ago, marked by many large impact craters and followed by the Hesperian epoch.

Origin

Named for Noachis Terra.

Full word history & related roots →
Cite this entry
APA

Noachian epoch. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/Noachian%20epoch

MLA

“Noachian epoch.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Noachian%20epoch. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “Noachian epoch,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/Noachian%20epoch.

Source: Noachian epoch on Wiktionary, CC BY-SA 4.0.