sentences:  One tributary of the river coming from the west, Minnehaha Creek, receded only a few hundred yards from one of the channels of the Mississippi.Minnehaha Falls remains as a picturesque and informative relic of River Warren Falls, and the limestone-over-sandstone construction is readily apparent in its small gorge.At St. Anthony Falls, the Mississippi dropped over a limestone ledge; these waterfalls were used to drive the flour mills that were the foundation for the city's 19th century growth.