Hi, Im not a geologist either but history fascinates me as well as earth changes- modern and ancient.
According to the following site:
Only about 12,000 years ago, a warming climate melted many glaciers worldwide and signaled the end of the Pleistocene. Large quantities of silt,
gravel and sand were carried by rivers and streams into the San Luis Valley. Although the dunes existed long before the Pleistocene ended, glacial
outwash materials provided new sources of sand for winds to rework into even greater sand dunes.
Here's my take; Let's take dominoes. Did you ever stack dominoes when you were a kid? I tried making miniature houses and what nots. But there's a
trick to keeping them from falling. Because if it's too heavy topside, all the dominoes will fall.
I say the earth is MUCH like that. When the balance is off kilter, the earth will do it's best to regroup- The life on planet "E" had been so
accustomed to the ice age and lived with the gradual warming that when the earth could no longer adjust, it went top heavy- so to speak- and had to