247 



have made a lake of all of southern Tippecanoe County. This lake would 

 have been about one luuidred and tifty feet deep at Dayton, in the east 

 part of the county. Some of the moraines were entirely covered with 

 water. The broad upper valley of Little Wea was proliably made by a 

 stream tiowinc- in the opposite direction to that of the present stream from 

 where it is crossed by the Chicago, Indianapolis «S: Louisville Railroad. 

 Some part of the valley of the Big Wea below Romney may have been 

 made by a stream afterward reversed. When the Wabash was uncovered 

 the lake covering nearly the whole south part of the county fell to a much 

 lower level and the general course of the present Wea streams was laid 

 out. As the water fell the tops of the moraines appeared and the waters 

 flowed across their crests at the loAvest places. But the streams were not 

 continuous as now. The region was nearly covered by several smaller 

 lakes held in by bordering moraines and the streams connected the 

 lakes and formed the outlet of the lowest. The deep valleys show the 

 parts of the streams that flowed across the moraines from lake to lake. 

 As the streams deepened their valleys, the lakes were gradually drained, 

 leaving their smooth, muddy bottoms exposed to become the level marshy 

 prairies found at the settlement of the country. As the lakes fell to lower 

 and lower levels, the streams were extended across the lake beds, where 

 they now meander in sluggish courses in narrow, shallow channels. 



Paleontology of Bartholomew County, Indiana, Mammalian 



Fossils. 



J. Jep. Edwards, M. D. 



1. Mastodon (iiDcricauifs (Blum.). 



This animal is represented in this county by two specimens. 



a. Os sdcnini. 



Weight of fossil, eight pounds and nine ounces. Found in 

 1898 upon a sand-bar in White River, one mile east of Wailes- 

 boro; identified by Dr. M. N. Elrod. It is in a fair state of 

 preservation, with foramina and tuberosities well defined. In 

 possession of the writer. A brief account of the find appeared 

 in the I ud ion a polls Kens of January 15, 1001, and the Colum- 

 bus (Ind.) Daily Herald of same date. 



b. Tooth. Found in Ohio Township, Bartholomew County, in 

 1900. Have been unable to see it. 



