806 



INDEX. 



Herehey, Oscar H., aid by 147-148, 5137 



cited on basin-like expansion of the valley of 



Pecatonica River 18 



oited on Ccdarville gorge 495 



cited on Freeport fossils 167 



cited on Leaf River or Adeline esker 76,77 



cited on rock gorges of northwestern Illinois 491,494 



cited on silts in northwestern Illinois Ill 



cited on the physiographic development of the 



Upper Mississippi Valley 461,462 



cited on transported rock ledges 82,84 



cited on water-bedded silt 181-182 



exposures of Iowan drift noted by 138 



fossils collected by 169-170 



on eskers in Stephenson and Ogle counties 80,82 



reference to 552, 568 



ridge observed by 136 



work on western border of the Iowan drift 



sheet 131 



Heywortb, 111., section of well near 215 



wells at 695-696 



Hickory Creek, course of 540 



watershed of 505, 535 



Highland, 111., ridge from Pocahontas to 72-73 



wells at 750 



Highland Park, 111., wells at 580 



Hill, A., well section of 63 



Hillsboro, 111., coal boring at 741 



Hinckley, 111., wells at 604 



Hinde, George J., cited on fossiliferous beds near 



Toronto 189 



Hinsdale, 111., wells at 592-593 



Hobart, Ind., analysis of clay at 411 



thickness of drift at 392 



Hoffman's, F. N. , well at 587 



Hagar, Mich., section near 395 



Hog Pain, watershed of 508-509 



Hollandsville, 111., wells at 1 749 



Homer, 111., wells near 703 



Hoopeston, 111., -wells at 698-699 



Hopedale, 111., well at 214, 692 



Houston, Til., wells near "768-769 



Hoyleton, 111., wells near 770 



Humboldt, wells near 221 



Hutchinson's Lake, wells near 402 



I. 



Ice dispersion, centers of 21-22 



Ice invasion, effect of the Illinoian, on the outer bor- 

 der drainage 89-105 



Ice sheet, direction of retreat of 427-428 



in Mississippi Valley, drainage of 71 



Ideal, 111., wells near 613 



Illinois, altitudes in 7-12 



area of 12 



barrier ridge in southern 14 



changes in drift in central 28 



bowlders in eastern 198 



composite morainic belt of northern 290-307 



distribution of drift in, by depths 548 



drift in southern 65 



elevated limestone belt in 16 



elevation of glacial lobe of 179 



esker ridges of northwestern 76-82 



extent, of gumbo in 28-33 



Illinois, gravelly soils in 792-793 



knolls in the vicinity of drift border in southern. 39 



loess in northern 154 



measurements of rock gorges in northwestern. . 494 



mounds of Niagara limestone in 16 



pahain 134-135 



residuary soils in 791 



rock gorges of northwestern 493-496 



rock gorges in western 496 



sections of drift in 33-34 



silt deposit in southern 116 



silt in western 794 



soils in (table) 790-791 



sources of soil material in 788 



stria* in northeastern 415 



structure of drift in 27-28 



thickness of drift in 27 



till in 28 



till in Ohio Valley in 65-66 



topographic character of the drift border in 38-40 



topography of drift in 26-27 



wells in unglaciated counties of 784-787 



white clay in southern 795 



Illinois and Iowa ice lobes, relation of the 151-153 



Illinois River, altitudes near 15 



altitudes of rock floor and present lower 501 



composition of ridge between Mississippi River 



and 60-61 



course of upper 501-502 



deposit s along 498 



deposits at the bead of the 423 



depression north from Beardstown, in valley of . 500-501 



divisions of valley of 498-499 



drainage area of the tributaries of 497 



drift border east of 64 



drift structure along 284 



erosion below the Morris Basin in 423 



extent of the watershed 496-497 



former lake at the bead of 337 



gravel deposits in the valley of 275, 276 



loess in valley of 156 



preglaeial and postglacial condition of 422 



Shelby ville moraine east of 214 



structure of drift west of 213-218 



topography between Mackinaw River and 251-252 



topography west of 250-251, 280-281 



variations in the bed of Upper 502 



wells west of 207 



Illiopolis.IlL, wells at 725 



Indiau Creek, sand ridge near 329-330 



watershed of 521 



Indiana, altitudes in 7,405 



change in drainage in southwestern 97-104 



drift in south western 66-67 



elevated tract of conglomerate sandstone in 16-17 



"hill country" of 16 



stria? in northwestern 414 



till in southwestern 66-67 



western, thickness of Shelbyville drift in J99-200 



Indianola, 111., wells at 700 



Iola, 111., wells near 758 



Iowa, altitude of 7 



structure of drift border in southeastern 40-43 



Iowa ice lobes, relation of the Illinois and 151-153 



Iowa River, section of well in valley of 50 



Iowan drift sheet of the Illinois lobe, distribution of. 131-134 



