46 



l>ovvl(lcrs art.' liahlr to be loiiiid in tlic cuts tliroiigli tlu' lar^e i-'idges is considered 

 significant. It would also seem that the parallelism and continuity of the ridges 

 ' of both types are greater than could be expected of deposits determined alone by 

 wind. Ill the gravel ])its south of Rensselaer there is nothing to indicate that the 

 adjoining portions of the ridges were formed in .1 manner difl'erent from those 

 portions where gravel is found. 



The above facts suggest the possibility of the symmetrical ridges having been 

 formedclirectly by glacial action as the glacier receded to the northeast; and in 

 some cases they have served as lodgment tracts for the accumulation of wind- 

 blown sand, in that way largely determining the course and extent of the uu- 

 symmetricai or dune ty|ie. Hut more tield work is net'essary before considering 

 this beyond a hypothesis. 



There are at least two Ixiwhlcr l)elts in the county, but because of limited 

 time I have not been able to follow them out. One of these is north of Keming- 

 ton and the other is east and southeast of Rensselaer. The latter 1 have traced 

 from the junction of the Iroijuois and I'inkainink rivers southeastward for a dis- 

 tance of three miles. It will probably be found to extend southeastward avid 

 eastward into White County, forming the southern border of the old lake through 

 the bed of which the Monon Railroad passes, from Lee to Pleasant Kidge. The 

 careful location of these bowlder belts will probably throw light on the glacial 

 phenomena of the locality. 



Con(:ernin(; a I')t;RiAL Mocnd Reckntlv ()i'i;xei> in Haxdoi.i'm (inNrv. \'>\ 

 JosKi'H Moore. 



Soutiiern Randi)ipji and the adjacent portion of Wayne, is in the main a level 

 tract, the land during ordinary seasons being rather wet. 



liesides a numbi'r of well-defined made mounds in the luighborhood of Lynn 

 Station on the (J. R. tV I. R. R. there are fre(juent exam])les of natural mounds. 

 These are usually much larger than the artificial nu^unds. They may be com- 

 pared to drift islands surrounded by Hat areas of dark colored soil. Some of these 

 mounds of nuxlified drift have been utilized by ancient peoples as burial grounds. 

 Tlve one >>\ which 1 speak is a fraction over a mile west of I>ynn Stati(»n. It is 

 about loO yards in ciicumfcrcnce and IS to 20 feet high, and is so symmetrical as to 

 have the appearance of a made mound ; but in a wide cutting made through it by 

 the gravel haulers the structurt' clearly shows an acpieous <lcposit from top to 



