Explanation of Plate VII. 



View of Natchez bluffs, looking southwestward. At low water the 

 water in the foreground recedes and exposes extensive mud-bars. Ex- 

 posure no. 26 is just visible near the top of the hill along the road in 

 the foreground. The deep cut in the projecting point of the bluff in 

 the background shows exposure along the N. O. & N. W. R. R. Expos- 

 ures 5, 6, 7 and 8 also show indistinctly. 



