THE IOWAN ICE INVASION 349 



(1) Bertram, in a gravel pit. 



(2) Springville, in or on Iowan drift. 



Dr. Hay 16 cites the following records which may be referable to the Peorian 

 interval. 



Black Hawk County. Waterloo, teeth of Elephas primigenius in a sand pit, 

 at a depth of 7 feet below the surface. At this depth the deposit would seem 

 to be referable to post-Iowan time (p. 438). 



Fayette County. Near Clermont, tooth of Elephas primigenius in gravel 

 at depth of 20 feet, at a place between Elgin and Clermont. Ovibus moschatus 

 (part of a skull) was found in Township 94, Range 35, in clay at depth of about 

 26 feet (pp. 81-82; 433-434. Anderson's list, p. 28). 



Fra nklin County. Near Hampton, tooth of Elephas primigenius from sand 

 pit near Breed's Lake (Sect. 19, T. 92, R. 20) at a depth of 6 feet (p. 434). 



Clayton County. Tooth in Gravel pit two miles east of Garber (sect. 32, 

 T. 92 N, R. 3 W). Possibly Iowan valley train (p. 381). 



Dubuque County. One-half mile from Center Grove. Portion of tooth 

 of Elephas primigenius found in making drift toward lead crevice. (Hay, p. 

 433). 



It is probable that these animals, as has already been suggested by Dr. 

 Hay, lived in this region when the Wisconsin glacier was not far away. They 

 would, therfore, be correctly placed at the end of the Peorian interval, as their 

 remains appear to be in deposits from the Wisconsin till sheet. 



2. NEBRASKA 



Many years ago Leidy reported 17 the skull of Geomys bursarius from yellow 

 loess deposits near Plattsmouth. Mastodon and elephant teeth were found 

 in the same formation. Hayden 18 refers to the same specimen but indicates 

 that it was in a nodule in the loess. Hayden also reports the buffalo (Bison) 

 from marl bluffs near Dakota City, 30 feet below the surface. The exact 

 nature of the deposit is not indicated. 



3. MINNESOTA 



The Peorian interval is apparently represented in several parts of south- 

 eastern Minnesota. On Blue Earth River, near Minnesota River, the follow- 

 ing section has been observed: 



Deposit Correlation 



1. Ash-colored clay 8 feet inches Wisconsin. 



2. Coarse sand with some pebbles 2 " " 



3. Ash-colored clay marl 7 " " 



4. Sand and pebbles, with small boulders at base 8 " " 



" Geol. Iowa Surv., XXIII. 

 17 Proc. Phil. Acad., 1867, p. 97. 

 u Final Report, pp. 10-11. 



