88 IOWA ACADEMY OF SCIENCES. 



relations that the various parts of this terrane bear to one 

 another have occasioned some marked complications in termi- 

 nology. 



At the typical locality, in Platte county, Missouri, a few 

 miles north of Kansas City, the shales are about eighty feet 

 thick. In the Missouri river section no important limestone 

 bands occur. In southeastern Kansas a limestone is soon 

 intercalated, reaching a thickness of twenty feet, or more, and 

 subdividing the formation into parts that have been thought 

 prominent enough to secure special names. The shales thus 

 become separated into two parts by the intervening limestone, 

 the upper one being called by Haworth and Kirk* the Le Roy 

 shale, the calcareous member of Carlyle limestone, by the 

 same writers, and the lower one by the senior author, the lola 

 shale, f The first named portion was subsequently changed, J 

 without explanation, from Le Roy to Lane, the latter name 

 being used also in later descriptions. § 



According to deep-well records the Parkville and Thayer 

 shales merge northward beyond St. Joseph, the Ida limestone 

 failing. 



Stanton Limestones. — Of late years the Kansas geologists 

 have used the term Garnett for the third important limestone 

 formation of the Missourian series. 



There are, however, two older names which have to be con- 

 sidered in this connection, both of which were applied to the 

 main body of limestone. 



As early as 1866 Swallow |1 appears clearly to have had the 

 principal calcareous member in mind when he applied the name 

 Stanton limestone. The name is derived from a town of that 

 title situated in Miami county on the eastern border of Kansas. 



The lower shaly portion of his Stanton Limestone series, 

 corresponds to the Parkville shales, and has ascribed to it 

 about the same thickness as shown farther to the north on the 

 Missouri river. The correlations made by Swallow, of the 

 Stanton limestone, as developed in the original locality on the 

 Marais des Cygnes, in Miami county, with the section west of 

 Topeka are, of course, erroneous; for it is now known that 

 there is a stratigraphical interval between the two locations of 



* Kansas Univ. Quart., Vol. II, p. 110, 1894. 



tibld., Vol.11, p. 134, 1894. 



*Ibld., Vol. Ill, p. 277, 1895. 



§ Univ. Geol. Sur. Kansas, Vol. I, p. 159. 1896. 



II Kansas Geol. Sur„ Prelim. Kept., p. 20, 1866. 



