GEOLOGICAL AND NATURAL HISTORY SURVEY. 2*7 



the shore of Lake Michigan and distant from it about twelve 

 miles. The Des Plaines River enters this moraine near Mt. Forest 

 and the other lake outlet, known as "the Sag-," enters it about five 

 miles east of Sag Bridge. Between Mt; Forest and the Sag out- 

 let the moraine covers an island situated between the outlets of 

 Lake Chicago. The main part of the moraine crosses the Des 

 Plaines between Lemont and Joliet and thence, continuing south 

 of east, its crest passes near Frankfort and Monee and enters Indi- 

 ana from southeastern Will County. There is a somewhat distinct 

 outer belt following the divide between the Des Plaines and Du 

 Page southward past Joliet and crossing the Des Plaines three to 

 five miles below that cit3^ This belt, east from the Des Plaines, is 

 in places distinct from the main belt, but scarcely merits a sepai- 

 ate name, since it is so generally united with that belt. Where 

 distinct it is about two miles in width. Throughout much of the 

 interval between the Des Plaines and the Indiana line this outer 

 belt is nearly parallel with the Kankakee River and distant from it 

 about ten miles. Near the Indiana line its border approaches the 

 Kankakee and in Indiana follows closely the north side of the 

 marsh drained by the K*ankakee. 



Relief. — The crest of the Valparaiso moraine is much higher 

 than its outer and inner borders, but the moraine has such broad 

 slopes that it has not a bold relief on either face. The following 

 table of elevations is taken from the profiles of several of the rail- 

 ways which cross the moraine. 



TABLE OF ELEVATIONS ON VALPARAISO MORAINE. 



Railroad. Inner Border. 



E. J. & E., in Lake' County 720 feet. 



Wisconsin Central 683 " 



C, M. & St. P ..646 " 



C. & N. W. (Wis. div.) 650 " 



C. & N. W. (Omaha div.) 641 " 



C, B. & Q 646 " 



Wabash 665 " 



C, R. I. &P..... 630 •' 



111. Central 650 " 



C. & E. 1 632 " 



(i) Outer border of main ridge. 



All of the above lines cross the highest part of the moraine 

 in their respective latitudes, except the Wabasli, Chicago, Rock 



