250 million years ago most continents were all clumped togetehr into a “super continent” this has far more effect on screwy weather patterns. The fact that today the earth’s continets are more or less evenly distributed with large masses of water between them has had a very stabilizing effect on the global weather pattersn, in fact it is one of the thigs that has lead to periods of global cooling known as the “ice ages”. If we had another super continent situation, I would be worried about Global warming CAUSED by having a supercontinet over CO2 anyday.
The Snowball Earth hypothesis posits that the Earth’s surface became entirely or nearly entirely frozen at least once, some time earlier than 650 Mya (million years ago).
Do supercontinents make it hot? make it cold? Do climate patterns shift?
Nobody knows anything. They have these little theories that help them feel smart and in control, but most of this stuff becomes laughable with 20 years of first being put forward.