24 GLACIAL, FORMATIONS OF ERIE AND OHIO BASINS. 



This report, like that on the Illinois glacial lobe (Monograph XXXVIII) , 

 presents the resxilts of an investigation carried on for several years under 

 the direction of Prof T. C. Chamberlin, who preceded the writer in a 

 reconnaissance of the reg'ion, and has published a preliminary report.^ To 

 these earlier results, as well as to Chamberlin's direction and suggestions,' 

 the writer is greatly indebted. 



Indebtedness is also acknowledged to many others who were earlier on 

 the ground, and to many who tlii'oughout the investigation have aided by 

 contribution of material and by suggestions concerning the interpretations 

 of the phenomena. 



OUTLIISrE OF PREVIOUS PUBLICATIOlSrS. 



It is impracticable to give a full review of the many papers which deal 

 with the surface geology of the region. About 500 of these papers have 

 been examined and an endeavor has been made to duly accredit those which 

 have materially advanced the interpretations. In addition to this a list of 

 all the papers which have come to the writer's notice is presented. 



Upon turning to this list the reader will find that Niagara River and 

 its falls and gorge have furnished themes for not fewer than thirty geolo- 

 gists and travelers from the time these striking natural features were first 

 brought to the attention of civilized man in 1535. 



The gigantic mammals which once roamed this region, but which are 

 now extinct, furnished a theme for animated discussion at the early meet- 

 ings of scientific associations in America. The discovery of their bones 

 at Big Bone Lick in Kentucky in 1 744 was followed by numerous other 

 discoveries in all parts of the region here described, as well as in other 

 parts of North America. This subject has received less notice in recent 

 years than in the first half of the last century, and the present report has 

 nothing new to offer. 



The glacial drift of the region appears to have attracted notice from the 

 earliest days of settlement. This is especially true of Ohio, as shown by 

 the papers of Drake in 1817, of Atwater from 1818 to 1826, of Granger 

 in 1823, of Hildreth from 1827 to 1837, of Darius and Increase Lapham 

 in 1832, of Riddell in 1837, and by the Geological Reports for 1838 



^Preliminary paper on the terminal moraine of the second Glacial epoch, by T. C. Chamberlin: 

 Third Ann. Kept. U. S. Geol. Survey, 1883, pp. 330-352. 



