o3S J. E. TODD — PLEISTOCENE PROBLEMS IN MISSOURI. 



This terrace is finely shown at Kansas Cit}^, both upon the nortli side— 

 the river front, and also in the southern part of the city, in a valley con- 

 necting the Kansas river with the Big Blue. Many excavations show 

 well its general structure, indicating the local derivation of much of its 

 material. It is developed along the Big Blue near its mouth and is quite 

 broad at Sibley. On the north bank of the Missouri it is finely shown 

 near Camden, south of Eichmond, at Brunswick, about Glasgow and ex- 

 tensively in the southern part of Howard county. Upon the south side 

 of the river a small patch of it, as- of an old bend, is found southwest ol 

 Lexington and again at Waverly, where an old channel leaves the present 

 trough of the Missouri. This channel leads southeast along the present 

 course of Salt creek to the La Mine, its southern bank passing Salt Springs 

 and Marshall. Near the mouth of the La Mine it connects with the present 

 channel of the Missouri ; then extends still farther southeast to Billings- 

 ville, and thence east to the Missouri along the course of the Little Saline, 

 which marks its southern bank. This channel is filled to a height corre- 

 sponding to the terrace we are considering, namely, 100 to 150 feet above 

 the present level of the stream. It shows an abundance of sand in its 

 lower portion. In fact, its course has been traced by the occurrence of 

 sand in deep wells along this line. 



Little, if any, trace of this high terrace is found in the deep and com- 

 paratively narrow gorge reaching from near Jamestown, in northern 

 Moniteau county, to the west line of Saint Charles county, although loess 

 is found capping rocky ledges at a height corresponding to this terrace 

 at Jefi'erson City and at Chamois. 



A terrace corresponding to the one under consideration is found at 

 Washington and Labadie, in Franklin county, and probably at other 

 points on the southern bank of the Missouri, but is most prominently 

 developed in the vicinity of Saint Charles, where the base is composed 

 of limestone rising 25 feet above the river. Upon this limestone, scat- 

 tered northern bowlders are found with some pebbly clay. The upper 

 part of the terrace, as is well shown at Saint Charles, is composed of 

 typical loess with red clay and a thin strata of red sand in its lower por- 

 tion. At this point this terrace may be considered as belonging to the 

 Mississippi, and a somewhat similar development of it may be found 

 near Winfield and Old Monroe, while at Louisiana and near the mouth 

 of Salt river and near Hannibal are small areas exhibiting a much more 

 bowldery character, especially at the last point mentioned, where deep 

 deposits of coarse gravel appear. What is believed to be the same ter- 

 race is extensively developed around Florissant and in the eastern por- 

 tion of Saint Louis, extending more or less distinctly as far as the mouth 

 of the Meramec. This terrace everywhere bears northern bowlders, 

 sparsely scattered. 



