Evidence abounds that these animals lit all their Menorah candles and ate too much starchy beans which added to their flatulence!!!
AKA the flora fossils show a tropical setting during the time these animals roamed the wild. So the shift of the axis and plate techtonics are considerd the main factor in the remains being where they wwere found!!!
The Earth was clobbered by a comet that knocked it off the axis and rolled it some degrees. Thus, hot places became cold and cold became warm before the gravitational pulls were able to keep it in orbit.
Just like hitting a ball and defying gravity for a short time.