10 THE ILLINOIS GLACIAL LOBE. 



Table showing altitudes of drift surface and rock floor, etc. — Continued. 



County. 



Putnam 



Lasalle 



Kendall 



Grundy 



Will 



Kankakee .. 



Iroquois 



Ford 



Livingston . 



McLean 



Tazewell . .. 

 Woodford .. 

 Marshall . .. 



Stark 



Peoria 



Knox 



Warren 



Henderson . 

 Hancock . . . 

 McDonough 



Fulton 



Adams 



Schuyler . . . 



Brown 



Mason 



Cass 



Menard 



Logan 



Dewitt 



Macon 



Piatt 



Champaign 

 A r ermilion .. 



Edgar 



Clark 



Cumberland 



Coles 



Douglas 



Moultrie . . . 



Shelby 



Christian .. 

 Sangamon.. 



Highest 

 point. 



740 

 930 

 760 

 700 

 820 

 750 

 780 

 840 

 840 

 913 

 820 

 830 



835 

 850 

 810 

 770 

 765 

 775 

 750 

 750 

 750 

 807 

 650 

 690 

 650 

 744 

 800 

 760 

 820 

 830 

 790 

 839 

 770 

 700 

 799 

 725 

 750 

 770 

 750 

 720 



Highest 



known rock 



surface 



640 

 552 



700 

 690 

 615 

 561 

 688 

 700 

 575 

 621 

 585 

 800 

 780 

 800 

 750 

 670 

 685 

 680 

 740 

 735 

 645 

 710 

 371 

 550 

 600 

 550 

 541 

 556 

 480 

 676 

 650 

 652 

 620 

 600 

 635 

 481 

 490 

 625 

 650 

 707 



Lowest 

 point. 



430 

 433 

 540 

 477 

 485 

 550 

 650 

 650 

 588 

 650 

 425 

 429 

 430 

 620 

 425 

 536 

 (?) 

 505 

 468 

 500 

 422 

 452 

 417 

 414 

 420 

 415 

 445 

 520 

 585 

 550 

 600 

 610 

 480 

 480 

 430 

 510 

 575 

 610 

 560 

 490 

 530 

 512 



Lowest 



known rock 



surface 



330 



330 



509 



465 



485 



538 



260(?) 



350 



365 



469 — 



325 

 (325) 

 (325) 



600 



341 



536 



450 

 (375) 

 (375) 



500 

 (325) 

 (350) 

 (345) 

 (345) 

 (325) 



345 

 (325) 



379 — 



359 — 



400 



480 



440 



436 



480 

 (355) 



510 — 



538 — 



481 



490 



538 — 



497 



512 



Range in 

 drift sur- 

 face. 



310 



497 

 220 

 223 

 335 

 200 

 180 

 190 

 252 

 263 

 395 

 401 

 465 

 230 

 410 

 314 

 (?) 

 265 

 297 

 275 

 328 

 398 

 333 

 393 

 230 

 275 

 205 

 224 

 215 

 210 

 220 

 220 

 310 

 359 

 340 

 190 

 224 

 115 

 190 

 280 

 220 

 208 



Range in 

 rock sur- 

 face. 



235 



350 



131 

 97 



215 



152 



355(f) 



211 



323 



231 + 



250 

 (296) 

 (260) 



200 



439 



264 



300 

 (295) 

 (310) 



180 

 (415) 

 (385) 



300 

 (365) 



(46) 



205 

 (275) 



171 + 



182 + 



156 

 (?\ 



236 

 214 

 172 

 (265) 

 90 + 

 97 + 

 (?) 

 (?) 

 87 + 

 135 

 195 



