1) Old 
The Noachian is a geologic system and early time period on the planet Mars characterized by high rates of meteorite and asteroid impacts and the possible presence of abundant surface water. The absolute age of the Noachian period is uncertain but probably corresponds to the lunar Pre-Nectarian to Early Imbrian periods of 4100 to 3700 million years...
• (a.) Of or pertaining to the patriarch Noah, or to his time. • (a.) Of or pertaining to the patriarch Noah, or to his time.
No·a'chi·an adjective Of or pertaining to the patriarch Noah, or to his time. 
adjective of or relating to Noah or his time; `Noachian deluge`
of or pertaining to the patriarch Noah or his time.