Hesperian 1
noundomain: time
EnWordnet [ver.5.0]
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EnglishDefinition
a geologic system and time period on the planet Mars characterized by widespread volcanic activity and catastrophic flooding that carved immense outflow channels across the surface.
Examples
- 1.By Hesperian times, all of the large shield volcanoes on Mars, including Olympus Mons, had begun to form.
