Actually in the Bible the Hebrew word is Adamah. There was a world wide extinction around 12,000 years ago. The date does not line up with Noah's flood around 4500 years ago. Although they seem to be tired together in some way. Just like today our global warming began around 12,000 years ago and this is just an extension of that. First the world was cleansed with water and soon the world will be cleansed with fire. Just as we are baptized and cleansed in water and then in fire.
0127 // hmda // 'adamah // ad-aw-maw' //
from
0119 ; TWOT - 25b; n f
AV - land(s) 125, earth 53, ground 43, country 1, husbandman 2,
husbandry 1; 225
1) ground, land
1a) ground (as general, tilled, yielding sustenance)
1b) piece of ground, a specific plot of land
1c) earth substance (for building or constructing)
1d) ground as earth's visible surface
1e) land, territory, country
1f) whole inhabited earth
1g) city in Naphtali