102 THE ILLINOIS GLACIAL LOBE. 



above tide. The sag leading across this divide, like that near Francisco, is 

 too narrow to have suffered much erosion by a stream discharging across it. 

 On the whole the evidence of southward discharge into the Ohio seems very 

 weak, and the view that the water which accumulated along the ice margin in 

 Dubois and Pike counties found its main discharge to the Wabash under the 

 ice margin, appears more probable. At most the col near Francisco appears 

 to have served only temporarily as a waste weir for the accumulated waters. 



Several interesting deflections of small streams have been noted in the 

 vicinity of the g-lacial boundary in the district lying between East White 

 and the main White River. These have been brought to light by the 

 studies of Mr. C. E. Siebenthal, of the Indiana geological survey, with 

 perhaps one exception, that of Furse Creek in northwestern Martin County. 

 Siebenthal has kindly furnished notes on these changes of drainage in 

 advance of the publication of his report. Since receiving his notes the 

 writer has had opportunity to examine some of the deflections brought 

 to light by Siebenthal, but for the detailed examination, as well as the 

 discovery of these deflections, Siebenthal should receive credit, It is 

 scarcely probable that all the deflections have been brought to light, for the 

 valleys of some streams in Daviess County have not been given sufficient 

 attention to warrant their discussion. The first deflection discussed is that 

 of Furse Creek, after which the streams examined by Siebenthal are taken 

 up in order from south to north. 



Furse Creek as shown in PL IX, strikes the glacial boundary about 2 

 miles east from the west line of Martin County. It there turns abruptly 

 southward and enters a gorge in the southeast part of sec. 8, T. 5 N., R. 4 

 W., in which the creek bluffs border the stream closely on each side for a 

 mile or more. The stream then enters an open valley formed by the small 

 southern tributary which joins it in sec. 1 8. Whether it has suffered other 

 deflections below this point has not been determined. From the point of 

 deflection in sec. 8 a lowland tract heavil) T coated with drift leads north- 

 westward to the valley of Doans Creek, near Scotland. This probably was 

 the preglacial line of discharge for Furse Creek. 



Siebenthal has found that Richland Creek was deflected southward 

 near the point where it strikes the glacial boundary 1£ miles east of the 

 village of Newark, its old course having been northwestward from that 

 point. The position of the col on the old divide below the point of deflec- 

 tion of the creek is clearlv shown in a view from a hill southeast of Newark. 



