Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- proper noun The most recent of the
Martian geologic epochs, from approximately 1.8 billion (1800 million) years ago (the end of theHesperian epoch ) to the present.
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
Named for Amazonis Planitia.
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