SUGGESTIONS FOR FUTURE STUDY 401 



in a report on the Geology of Arenac County. 5 Leverett and Taylor , 5a in the 

 Pleistocene of Indiana and Michigan, map this region and provide a wealth of 

 information. Several excellent maps, tho old, appear in volumes I and II of 

 the Geological Survey of Ohio. In volume II, page 58, lagoon or swamp depo- 

 sits are indicated behind beaches near Cleveland. 6 



LAKE CHICAGO 



In the southern part of the Chicago outlet the body of water known as Lake 

 Kankakee should be thoroughly searched for evidences of life which may have 

 migrated up the Illinois-Kankakee rivers. 7 The Green Bay region is also 

 worthy of attention and studies similar to those carried on in the Chicago region 

 would doubtless be productive of important results. 



LAKE DTJLUTH 



The waters of this portion of the Lake Superior basin were probably purely 

 glacial and there is little hope of finding the remains of life in the sediments 

 laid down by this body of water. The silts of the St. Croix outlet, however, 

 should be carefully examined. 



LAKE IROQUOIS 



Fossils have been found in this beach at several Canadian localities, but 

 with the exception of the Niagara River deposits, no records have been seen 

 from localities on the American side of the Lake. Hall has recorded Unios 

 from this beach, but no species have been listed (see ante, page 147). The re- 

 mains of life doubtless occur but have not yet been recorded. Fairchild has 

 mapped the ancient shore of Lake Iroquois, as well as of the other glacial waters, 

 and his report on "Glacial Waters in Central New York" 8 will be found very 

 helpful to anyone studying the life which may be found in or near these beaches. 

 Leverett 9 publishes an admirable map of the Pleistocene features of northwes- 

 tern New York, which clearly indicates the area of the Iroquois beach and lake. 

 Coleman 10 (Iroquois Beach in Ontario) also gives an excellent map showing 

 the position of this beach in Ontario and New York. The region of Sodus 

 Bay, as well as the whole of western Lake Ontario and the eastern portion of 



'Mich. Geol. and Biol. Surv., No. 11, 1912. 

 « a Monograph LIU, U. S. G. S., 1915. 



• Vol. II, p. 61 . See also Carney, Bull. Sci. Lab. Denison Univ., XIV, pp. 262-287, 1909. 

 for shore lines of Maumee, Whittlesey and Warren waters. 



7 See Leverett, Illinois Glacial Lobe. 

 » Bull. N. Y. State Mus., No. 127, 1909. 



• Monograph XLI, plate iii. 



" Bull. Geol. Soc. Amer., XIV, pp. 347-368, 1904. 



