A N0TA1SEE TYPE PLEISTOCENE SECTION 9 



rate in excess of leaching, and that subsequently the deposition of the loess 

 either decreased in rate or ceased, giving opportunity for leaching to take 

 place. 



SUMMARY 



This cut is remarkable in its display of evidence for two glacial epochs, 

 the Illinoian and Wisconsin, and two interglacial epochs, the Sangamon and 

 Peorian. Most of the varieties of interglacial evidence are present, includ- 

 ing ordinary weathering, gumbotil development, loess deposits, and soil 

 formation. Not only is the common Peorian loess present, but also what 

 seems to be loess of Sangamon age and the more-or-less local post-Wisconsin 

 loess. Well deserving is the Farm Creek exposure — T miles east of Peoria, 

 Illinois — of a place among the type exposures of the Pleistocene of America. 



The writer wishes to express his grateful appreciation to Curator F. C. 

 Baker for his study of the fossils. His description of these is to be published 

 soon. 



