116 Kansas Academy of Science. 



Elsewhere the writer has indicated some cases of eolian loess (Kan. 

 Acad. Sci. Proc. 1916.), also similar deposits of aqueous origin. (Iowa 

 Acad. Sci. Proc, Vol. XXVI, p. 356.) A few years ago he called at- 

 tention to the probable different age and origin of the lower part of the 

 loess at Kansas City, Mo. (Mo. Geol. Survey, Vol. X.) This paper is to 

 emphasize its later date and aqueous origin. It is sixty to eighty feet 

 in depth at many localities and is probably of early Wisconsin origin. 



The reasons for believing in its aqueous origin are the following: 



1. The terrace-like form of the deposit. At Kansas City, Mo., it forms 

 a distinct bench along the north side of the city, with its top 125 to 150 

 feet above the river. Most of Kansas City, Kan., agrees in height. Also 

 at Leavenworth and at other localities, given in a later section. 



2. The occurrence of distinctly water-laid strata in the lower part of 

 the terrace, and a gradual and indistinct passage upward into typical 

 loess. This has been observed at the Kansas Cities, St. Joseph and Sioux 

 City. 



3. The low level of the base of the formation. This is usually very 

 little above the level of the flood plain of the present stream, or 25 or 

 30 feet above the stream itself. This is in marked contrast with the 

 usual bank of the stream, which is 150 to 200 feet of C'arboniferous 

 strata capped with till and loess. Moreover, this deposit occurs in bends 

 or coves of the highland bluffs, as though it were in remnants of an old 

 channel once deeply filled with it, and from which the- present deeper 

 channel has since been excavated. 



Besides the localities already indicated, it has been noticed along the 

 Missouri below Forest City, Mo., near Iowa Point, Kan., and along Wolf 

 creek, a little above its junction with the Missouri. It appears along 

 the Kansas near Armstrong, Muncie, Edwardsville, Holliday, Bonner 

 Springs and northeast and northwest of Lawrence. The typical loess 

 along the Missouri has the lighter buff color prevalent in the later sedi- 

 ments of that stream, while along the Kansas it is darker reddish, as if 

 derived more from carboniferous shales. 



This deposit has been so connected with the higher loess, which is 

 probably of eolian origin, by wind action, hillside wash and creeping, 

 that all have been considered one formation. 

 March 23, 1918. 



Lacustrine Beds Near Atchison. 



(Abstract.) 

 J. E. Todd. 



It has been known for several years that there is thick deposit of sand 

 exposed at Spaulding's quarry, a little northeast of Atchison, Kan. 



The quarry is in the upper Oread limestone, its top being over fifty 

 feet above the level of the flood plain of the Missouri. Upon the limestone 

 lies a stratum of chert gravel, 8-10 feet in thickness, and upon that 50-60 

 feet of rather fine sand. Over all is 10-15 feet of Kansan till capped with 

 25-30 feet of loess. Northern erretics occur occasionally in the upper 

 part of the sand, but not below. The sand corresponds in age to the 



