80 



WILLIAMS— DEEP KANSAN PONDINGS IN 



san glacier, is very sandy and, as stated above, is 8 feet thick at 

 track level at Brandon ; 2 feet thick at same level at Kennerdell, 

 These two places are indicated on Fig. 4 by the blunt arrow^s oppo- 

 site the letters (ND) in the name West Sandy Creek. 



'a»*v'aa 



Fig. 14. Drift overlaid by assorted gravels, Brandon. 



It is generally acknowledged that the glacial margin lay at or 

 just east of the Allegheny Valley at these places. Figs. 14 and 15 

 were taken at track level, and thus at the same distance above stream 

 level. The former shows drift overlaid by gravel at Brandon. The 

 drift here is spared in the more sheltered area. The latter shows 

 the entire thickness of the gravel at Kennerdell overlaid by the 2 

 feet of sandy iceberg capping. 



These are no remnants of a complete valley filling. The only 

 example of this exists in the abandoned part of the valley of West 

 Sandy Creek between Polk and its mouth at Takitezy. Its highest 

 point is near Niles, just below 1,160 feet. These gravels are like 

 similar ones dropped in the quiet areas behind the protecting 

 shoulders of ridges about which the stream winds. The only in- 

 teresting point about them is that they seem to have been the ex- 

 piring effort of the wasting Kansan glacier in the Allegheny- 



