LAKE MAUMEE. 35 



or shoreline. In applying names we might treat the several pauses as 

 so many stages of one lake, but the waters changed their levels, outlets, 

 shapes, and sizes and shifted their areas so extensively as the ice-sheet 

 withdrew that it seems better to consider each stage that had a separate 

 outlet as an independent lake to which a separate name should be applied. 

 Then the whole series may be called by a descriptive or locative name, 

 such as the Erie-Huron lakes.* 



The first stage of the glacial waters does not fall within the area here 

 considered, and has not been a special object of study by the writer, but 

 a brief account of it is given below in order to present a complete chro- 

 nology of the changes from the first to the last of the Erie-Huron glacial 

 lakes. This lake was named Maumee lake by Dryer in 1888.f 



Lake Maumee. 



van wert beach. 



This beach extends from the head of the outlet four miles east of Fort 

 Wayne through Van Wert, Ohio, to Findlay, where it ends on the front 

 of the Defiance moraine. It extends (as Winchell's Hicksville ridge) 

 also from the head of the outlet northeast through Hicksville and Bryan, 

 Ohio, to Adrian, Michigan, where it probably ends against the same 

 moraine. The correlation of the beach with the moraine at Adrian corre- 

 sponding to that established at Findlay by Leverett has not yet been 

 made by observation, but appears to be a matter of safe inference. The 

 beach is nearly horizontal throughout, with an altitude varying between 

 775 and 795 feet above sealevel, or 200 to 220 feet above lake Erie. 



FORT WAYNE OUTLET. 



This extends from a point four miles east of Fort Wayne westward 

 through the city, and thence southwest to the W abash river, near Hunt- 

 ington. It is generally a mile or more wide, and toward its head is partly 

 floored with gravel now covered with peat. Near Huntington it crosses 

 a sill of limestone. The possible continuance of this channel as the 

 course of a partial outlet during the next stage will be discussed below. 



DEFIANCE MORAINE. 



This is the first terminal moraine east of Fort Wayne, and passes in a 

 great curve convex to the west from Findlay through Defiance to Adrian. 



*Mr Upham used the name lake Erie-Huron in 1891 to designate the same waters as are here 

 called the Erie-Huron lakes. See "Glacial Lakes in Canada," by Warren Upham, Bull. Geol. 

 Soc. Am., vol. 2, 1891, p. 259. 



t Sixteenth Report of the State Geologist of Indiana, 1888, "Geology of Allen County," by 

 Charles R. Dryer, M. I)., pp. 107-126. This lake was also called Western Superior glacial lake by 

 Upham in 1893. See Minnesota Geological Survey, Twenty-second Ann. Rep., 1893, p. 62. 



