Geological Papers. 79 



not mention, and it is not known by the present writers 

 whether it was his volition or a mandate from the committee 

 on nomenclature of the United States Geological Survey. 



Allen Limestone.'' — The name Allen limestone is here used 

 to designate the limestone first above the Lane shales. There 

 has been a large amount of discussion regarding the names of 

 the two limestones first above the Lane shales. In its early 

 work, this Survey was lead into error a number of times on 

 account of a lack of proper correlation. After Adams'" joined 

 the United States Geological Survey, he likewise was incorrect 

 in treating this subject. All along it has been known that 

 there were two principal limestone formations, moderately 

 close together and sufficiently persistent to mark a prominent 

 escarpment across the state. In 1894 these two were not 

 differentiated, and in the section of the Neosho river were 

 called the Burlington limestone by Haworth and Kirk. In the 

 same publication, in a section from Coffeyville to Lawrence, 

 Haworth recognized a limestone at Carlisle, which he named 

 Carlisle, and the two limestone masses at Garnett and Ottawa, 

 which he named the Garnett limestone. 



In volume II of the State Survey the term Garnett was used, 

 Bennett having previously determined by field-work that the 

 exposure at Carlisle was the lower of these two. In that way 

 the name Carlisle was dropped. Adams decided that the lower 

 member, or possibly both of these, was the limestone men- 

 tioned by Swallow as the Stanton limestone. Later, in United 

 States Geological Survey Bulletin No. 238, whether voluntarily 

 or not we do not know, he abandoned the term Stanton and in- 

 troduced the terms Allen and Piqua for these two limestone- 

 beds. 



Our investigations have shown conclusively that the lime- 

 stone named the Stanton limestone by Swallow in his report 

 for 1866 is the upper one of these two much-discussed lime- 

 stone formations. Inasmuch as we are now ready to give de- 

 tailed descriptions and detailed names, we adopt the name 

 Allen for the lower one of the two, because it seems to be the 

 first name suggested for this specific formation, and retain 

 the name Stanton for the upper one, because Swallow sug- 

 gested it as early as 1866. Our former name, Garnett, may be 

 used, should it be desired, for the combination of the two, as 

 originally understood, but Adams's name, Piqua, for the upper 



34. Adams, Dr. Geo. I., U. S. G. S. Bull. 238, p. 20, Washington, 1904. 



35. Adams, Dr. Geo. I., U. S. G. S. Bull. 238, p. 20, Washington, 1904. 



