84 WILLIAAIS— DEEP KANSAN PONDINGS IN 



flows which made deep trenches, and deposited stratified outwash 

 and local gravels, as along the Juniata and the Clarion. It is per- 

 missible to ask whether these uncertain gravels, which are in un- 

 glaciated areas, but contiguous to possible glacial pondings, may not 

 have had an origin similar to those under consideration. 



REFERENCES. 



1. G. F. Wright. Amcr. Jour. Sci, Vol. LXVII, 1894. 



2. F. Leverett. Monograph, U. S. G. S., XLI, 1902. 



3. E. H. Williams, Jr. Bull. Geol. Soc. Amer., March, 1894. 



4. Ibid. Amer. Jour. Sci., Vol. XLIX, March, 1895. 



5. Ibid. Pennyslvania Glaciation, First Phase, 1917. 



6. I. C. White. Report on Huntingdon Co., Second Geol. Surv. Pa. 



7. J. C. Car 11. Vol. Ill, Second Geol. Surv. Pa. 



8. G. F. Wright. Bull. Geol. Soc. Amer., June, 1914. 



9. H. L. Fairchild. Bull. Geol. Soc. Amer., Vol. 7, 1895. 

 10. W. Upham, Internet. Geol. Cong., Toronto, 1973. 



