Posts Tagged ‘Sediment’

Comments Off on Did a Mega-Flood Doom Ancient American City of Cahokia?

(Clues found near the site of Cahokia (above) indicated that a flood occurred at the height of the city’s population and power.) Photograph by Ira Block, National Geographic. One thousand years ago, on a floodplain of the Mississippi River near modern-day St. Louis, the massive Native American city known today as Cahokia sprang suddenly into […]