411 REFERENCE · Wiktionary
Amazonian epoch
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Named for Amazonis Planitia.
Proper noun
1
The most recent of the Martian geologic epochs, from approximately 1.8 billion (1800 million) years ago (the end of the Hesperian epoch) to the present.
Further reading
Geology of Mars