I haven't found the right map to show

you yet. So just picture a diamond shaped area on the west side of Mississippi where it borders the Mississippi River. It's in between the Mississippi and the Yazoo River, "the Nile of the New World", one of the most altered landscapes in the world, where a swampy wilderness, an alluval plain that flooded yearly was turned into incredibly fertile farmland. I'm told that, most place topsoil is measured in inches, but here it goes down a foot and a half.