411 REFERENCE · Wiktionary
Noachian epoch
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Named for Noachis Terra.
Proper noun
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.
Further reading
Geology of Mars