LOWER WISCONSIN RIVER VALLEY

Spring Green, Sauk and Iowa Counties. May, 1970. Altitude c. 5,000 feet. Wooded sand islands and submerged sand bars occupy the purplish-appearing waters of the Wisconsin River channel near Spring Green.  The sculpted and streamlined shapes indicate the current is flowing from right (east) to left (west).  Much of the sand was transported into this portion of the Driftless Area by the enlarged Wisconsin River during glacial times.