Fig 5: The immediate post-glacial water flow in this area was complex. To the right, the yellow shading marks a pre-glacial channel of the Mississippi River. Blue arrows indicate water flow directions during a catastrophic flood of the Glacial River Warren. Notice that the smaller Mississippi River, to the left, is flowing in a reverse direction to what it does today. This is because the high floodwaters of the Glacial River Warren block the river from its normal course. Only with the final decline of the River Warren could water bodies assume something like their present configuration. Image courtesy of Jay Bell.
