Explanation of the Map. 



The figures in the parentheses represent altitudes above low water 

 mark (O) in the Mississippi river. 



The bridge across St. Catherine's creek on the Liberty road, not 

 shown on the map, is 75 feet above low water. 



The remaining numbers mark the exposures, the numbers correspond- 

 ing to those employed in the table of fossils. 



The following exposures lie be)-ond the limits of the map: 



Xo. 2(5, along Liberty road, east of St. Catherine's creek. Its alti- 

 tude is about 105 feet above low water. 



Xo. 30, made by a deep guile}* in a mass of loess lying consider- 

 ably lower than the bluffs, some distance north of no. 29. Like 

 no. 28, it contains broken fossils, which suggest possibilities of 

 land-slides from the bluff above. 



Xo. 31, north of no. 30, forming a high bluff facing the river, and 

 very similar to no. 



Xo. 32, an exposure high up on a hill north of the Xational ceme- 

 tery, at an altitude of about 21k feet above low water. 



Xo. 33, an exposure about half-way down the bluff along the road 

 leading to the river bottom north of the Xational cemetery. 



Xo. 34, along the road just north of no. 35, and somewhat higher. 



