CORRELATION OF THE RAISED BEACHES ON THE WEST 

 SIDE OF LAKE MICHIGAN^ 



JAMES WALTER GOLDTHWAIT 



Northwestern University, Evanston, 111. 



CONTENTS 



Introduction. 



The Field-Work. 



Character of the Record. 



The Algonquin Shore-Lines. 



The Nipissing and Lower Shore-Lines. 



Extenson of the Algonquin and Nipissing Planes South of Two Rivers. 



The Lake Chicago Shore-Lines. 



Conclusions. 



INTRODUCTION 



The eastern border of Wisconsin, along the western shore of Lake 

 Michigan and around Green Bay, has long been known to bear the 

 marks of a series of stages of the extinct glacial Great Lakes. Ter- 

 races, bluffs, and beach ridges at various altitudes above the present 

 lake were briefly described in 1877 by Dr. T. C. Chamberlin, in his 

 report on the Geology of Wisconsin.^ In the summer of 1893 Mr. F. 

 B. Taylor touched at several points on the Wisconsin shore, in a rapid 

 reconnaissance around the Great Lakes. ^ The highest shore-line 

 discovered by him at Kewaunee, Green Bay, Sturgeon Bay, and 

 northward through the Upper Peninsula of Michigan was found to 

 rise toward the north at a rate of more than a foot per mile, as if due 

 to regional deformation of the extinct water-plane. The Door County 

 peninsula (north of Sturgeon Bay) was not visited; but the early 

 measurements of Chamberlin in a general way confirmed this view. 

 The "highest shore-line" was later identified by Taylor as the beach 



1 Published with the permisssion of the Director of the Wisconsin Geological and 

 Natural History Survey. 



2 Geology of Wisconsin, Survey of 1873-77, Vol. II, pp. 219-28. 



3 "A Reconnaissance of the Ancient Shore Lines of Green Bay," American Geolo- 

 gist,Yo\. XIII (1894), pp. 315-27; and other papers published in the American Geologist 

 the same year. 



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