My theory of the ice age

Stephen Grand from the University of Texas' Jackson School of Geosciences supports the latter theory suggesting a massive magma plume beneath the park's surface. This plume, which is the technical word for a magma foundation, appears to extend as far as Mexico.

Yellowstone wouldhave a kilometer of ice suppressing the magma flows.  A sudden melt of the ice lifts the mantles and release the flow, upward.  If we get a partial melt,secondary paths are taken by the magma flow, it is distributed with fewer eruptions.  The recent glacial  cycles are all of the rapid melt, releasing one of several hotspots,enough to cool back down.

The periodic nature of recent ice age indicates tipping point eruptions are northern latitude.  Iceland eruptions, Alaskan and north american. The land masses hold huge glacier susceptible to sudden collapse.  But my theory breaks a bit because it predicts the yellowstone flow had been distributed, Yet we see it build up.  There is more than meets my eye.

My other theory, somewhere 20,000 years ago, humanoids went on a massive,and Malthusian expansion against the retreating ice, engaging in no til farming, the wide spread sowing of seed against the retreating ice.  This caused a marginal drain of CO2 during the melt, allowed a cooling phase and partial refreeze. Holocene is man made, we want to go back to ice age man.