EVIDENCE OF VERY EARLY GLACIATION IN OHIO 697 



hence possibly more than one ice-invasion. Some valleys made by diverted 

 streams were considerably mature when Illinoisan outwash was laid in them. 



4. Theories offered for explanation of diversions. 



(a) Diastrophic tilting and adjustments. 

 (&) Spring work and headward erosion. 



(c) Varying strength of strata open the way for diversions. 



(d) Ice-invasions. 



5. Conclusions. 



BEGINNINGS OF LAKE AGASSIZ 

 BY FRANK LEVERETT 



(Abstract) 



The position and extent of the Milnor Beach and the correlative outlet and 

 the moraine marking the position of the ice-border have been determined and 

 studied the past season. It was also found that an outlet of Lake Agassiz 

 farther west than Lake Traverse was in operation in the Herman and Norcross 

 lake stages. The Lake Traverse outlet alone was in operation during the 

 Timpah and Campbell lake stages. 



Water-laid moraines within the limits of Lake Agassiz have been mapped as 

 far north as the latitude of Fargo and Morehead. They show a strong lobation 

 of the ice-sheet in the Red River basin. 



REMARKABLE DEFORMATION OF THE ALGONQUIN BEACH 

 BY FRANK LEVERETT 



(Abstract) 



Levels run by the writer in 1912 along the Algonquin Beach in the northern 

 peninsula of Michigan and on Saint Josephs Island have shown the deforma- 

 tion to be irregular, with a range from 2 feet to 10 or 11 feet per mile in the 

 direction of maximum uplift, slightly east of north. There is not a constantly 

 increasing rate of rise, but less rapid follow more rapid rates. 



Discussion 



Prof. J. W. G'ldthwait : A profile of the Algonquin Beach in Ontario made 

 in 1907 is very similar to the one shown here by Mr. Leverett, except that the 

 abrupt increase in tilt rate from 4 feet per mile to 6 feet comes here at an 

 altitude of about 800 feet and in Ontario at 847 feet. 



The discordance among the points which Mr. Leverett's profile shows is too 

 great to be accounted for by original irregularities alone or by errors in meas- 

 urement ; they appear to be explicable only by inequality in the upwarping. 



PLEISTOCENE SUCCESSION IN WISCONSIN 

 BY SAMUEL WEIDMAN 



(Abstract) 



A brief statement was given concerning present knowledge of the drift and 

 associated surface deposits in Wisconsin, with a map showing distribution of 



