How do we know that continental drift did not cause the ice age?

Alfred Wegener first presented his hypothesis to the German Geological Society on 6 January 1912. His hypothesis was that the continents had once formed a single landmass, called Pangaea, before breaking apart and drifting to their present locations. so that means that that An ice age is triggered when summer temperatures in the northern hemisphere fail to rise above freezing for years ... The onset of an ice age is related to the Milankovitch cycles - where regular changes in the Earth's tilt and orbit combine to affect which areas on Earth get more or less solar radiation.