Amazonian 1
noundomain: time
EnWordnet [ver.5.0]
Definition
a geologic system and time period on the planet Mars characterized by low rates of meteorite and asteroid impacts and by cold, hyperarid conditions broadly similar to those on Mars today.
Examples
- 1.The Amazonian is thought to have begun around 3 billion years ago, though error bars on this date are extremely large (~500 million years).


