Geology
The landscape has a geomorphically young appearance because of its Pleistocene history. The Mississippi River probably did not occupy this course before the Pleistocene. The bluffs along this portion of the Mississippi River are Prairie du Chien dolostone capping Cambrian sandstone. Grandad Bluff is a classic mesa, as are all the bluffs along the river. In 1928 there was a movement to change the name to Granddad Mountain, and to change all the Bluffs along the Mississippi to The Mississippi Mountain Range.
Read more about this topic: Grandad Bluff