Answer:
GLACIAL DEPOSITS
Today, glacial deposits formed during the Permo-Carboniferous glaciation (about 300 million years ago) are found in Antarctica, Africa, South America, India and Australia. If the continents haven’t moved, then this would suggest an ice sheet extended from the south pole to the equator at this time - which is unlikely as the UK at this time was also close to the equator and has extensive coal and limestone deposits. If the continents of the southern hemisphere are re-assembled near the south pole, then the Permo-Carboniferous ice sheet assumes a much more reasonable size.
More evidence comes from glacial striations – scratches on the bedrock made by blocks of rock embedded in the ice as the glacier moves. These show the direction of the glacier, and suggest the ice flowed from a single central point.
Northeast - Described as a liberal bubble, high levels of education and taxation, gets bitterly cold, highly diverse, significant levels of income inequality, best schools and hospitals
Landmarks: Plymouth Rock, Harvard University, Statue of Liberty
Midwest - some parts wheat belt, farming, big areas undeveloped, prairie, but others very urbanized, number of great cities w high concentration of African Americans (although not nearly as large as South), melting pot of Protestantism and Calvinism and very suspicious of authority, factories, liberal leaning with a susceptibility for populism
Landmarks: Rock N' Roll Hall of Fame, Gateway Arch, Henry Ford Museum, Mount Rushmore
South - Hot, humid, lots of retired people, large populations of conservatives (with the exception of a number of large urban areas), tendency towards voter suppression tactics, welcoming and hospitable as long as you're not foreign looking, great varieties of fried food and excellent Mexican options, farming, oil, cows
Landmarks: Fort Sumter, Selma Bridge, The Alamo
West - major agriculture and livestock grazing, volatile weather/ climate (in some areas incredibly dry, with tornadoes, frequent droughts, etc; in others heaviest rainfall and snowfall in US), highly diverse and heavily influenced by elements of Asian, Latino, and Native American cultures, tech centers, varying rural and highly concentrated urban areas, Mormons, cowboy culture
Landmarks: The Golden Gate Bridge, Las Vegas Strip, The Space Needle, Old Faithful