The accuracy of the Content should not be relied upon and should be independently verified with primary sources of information. Taylor and Francis shall not be liable for any losses, actions, claims, proceedings, demands, costs, expenses, damages, and other liabilities whatsoever or howsoever caused arising directly or indirectly in connection with, in relation to or arising out of the use of the Content. This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden. Terms & Conditions of access and use can be found at http://www.tandfonline.com/page/termsand-conditions Wisconsin is located a third of the way from the Atlantic to the Pacific Ocean, near the northern boundary of United States. It is in the Middle West, between Lake Superior, Lake Michigan, and the Mississippi River. I t s greatest length is 380 miles, its greatest width about 290 miles, and its area iFp 56,040 square miles. GeoIogy. Wisconsin includes a large area of the oldest of rocks, the pre-Cambrian, and a still larger area of rocks of later, though very ancient, formation, the Paleozoic. T h e r e are also widespread, unconsolidated surface deposits made by the decay, or weathering, of older rocks, by stream and shore deposition, and by the continental ice sheet.