Physical features of the Des Plaines Valley . belonged under the till of which the Ijank is conglomerate liere is of finer texture than usual, but in other re-spects seems to be like that at other exposures. As only a thin layeris exposed here, one cannot judge either of the extent or of the averagestructure of the entire mass that may underlie the bowlder clay in thebank. This exposure is about three and a half miles southeast of theone near Spring creek. In a railway cut on the Elgin, Joliet and Easternrailway, near Eowell avenue, in the extreme southeast part of Joliet,ten feet
Physical features of the Des Plaines Valley . belonged under the till of which the Ijank is conglomerate liere is of finer texture than usual, but in other re-spects seems to be like that at other exposures. As only a thin layeris exposed here, one cannot judge either of the extent or of the averagestructure of the entire mass that may underlie the bowlder clay in thebank. This exposure is about three and a half miles southeast of theone near Spring creek. In a railway cut on the Elgin, Joliet and Easternrailway, near Eowell avenue, in the extreme southeast part of Joliet,ten feet of till covers a coarse gravel deposit which is in places wellcemented with carbonate of lime and limonite (hydrous oxide of iron).Nowhere else has -a limonite cement been noted. This rock is doubtlessthe same formation as those mentioned elsewhere. Another outcrop appears in the bluff on the east side of the outlet valleyjust north of Lockport, close beside the Chicago and Joliet trollev line. STATE GEOLOGICAL. SURVEY. BULL. NO. 11, PL. A. Outwash terrace on Spring creek.
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Keywords: ., bo, bookcentury1900, bookdecade1900, bookidphysicalfeatures00gold
