The United States of America is just under ten million square kilometers in surface area. Its most conterminous landmass is a topology of creases and folds, mountains and ridges, chasms and embankments. These create, among other divides, hydrological continental separations, sloped divisions for watersheds that flow into either the Great Lakes and Saint Lawrence River or the Missouri-Mississippi complex. These great, tectonic gutters cascade erosive, mineralized waters into the Atlantic Ocean or (...)