QUATERNARY FORMATIONS — THE DRIFT. 



215 



giound drainage. Of similar nature to these are those cases in which 

 the drift, by its open nature, furnishes underground channels of 

 drainage. A marked instance of this kind occurs in the vicinity of 

 Beloit. During the spring of 187G and 1877, a very considerable 

 stream flowed for several weeks into a shallow basin, and was entirely 

 lost. Another class, but of insignificant importance, is due to the ac- 

 tion of lakes, in throwing up ridges across small bays or indentures 

 along their shores. These, however, arc rarely so symmetrical as to be 

 misleading, and their situation is such as to readily indicate their origin. 



In the vicinity of the Kettle Kange proper, and at several localities 

 more or less distant from it, there are areas presenting a similar un- 

 dulating surface, marked by the peculiar hills and basins that charac- 

 terize that formation. These unquestionably owe their origin to a 

 similar cause, save that it was local and circumscribed in character. 

 Owing to their limited extent and general inconspicuous character, 

 they do not require extended or special description in this connection. 

 One of the best examples of this class is to be found in the vicinity 

 of Rock Lake, in Jefferson county. 



2. Minor Moraines. It will be most convenient to consider in 

 this connection certain minor morainic features of no very great ex- 

 tent or importance in themselves, except from their interesting char- 

 acter. Tlie most noteworthy of these occurs in sections 4, 5 and 6 of 

 the town of Herman, and in sections 33 and 34 in the town of Theresa, 

 Dodge county. It consists of a narrow, well defined ridge, rising not 

 usually more than twenty feet in height, extending in a general east- 

 erly and westerly direction for a distance of about three miles, with 

 occasional interruptions where it is crossed by streams and dry runs. 

 The accompanying rude map shows its topographical character and 

 I'elations. At its western extremity it is terminated by a remarkable 

 transverse ridge, oblique to the main range, as is imperfectly repre- 

 sented on the map. 



Pig. 8. 



Map of Moraine in the towns of Herman and Tlicresa. 



