MAY 26 1900 



KINDERHOOK FAUNAL STUDIES. II. THE FAUNA 

 OF THE CHONOPECTUS SANDSTONE AT BUR- 

 LINGTON, IOWA.* 



Stuart Weller. 



Introduction. 



The stratigraphic succession of the Mississippian beds at 

 Burlington, Iowa, was first indicated by David Dale Owen f 

 in 1852. At that time the Kinderhook stage or its equiva- 

 lent had not been defined, but the lower portion of his general 

 section, that portion which is now included in the Kinderhook, 

 was described as follows : — 



5. «' Band of cellular, buff, magnesian limestone." 



4. " Oolitic limestone containing Gyroceras Burlington- 

 ensis." 



3. " Dark gray, argillaceous limestones (locally hy- 

 draulic?)." 



2. " Bun , fine-grained siliceous rock, containing casts of 

 Cho?ieles, Posidonomya, Allorisma, Spirifer, Phil- 

 Upsia." 



1. " Ash colored, earthy marlites." 



At that time Owen included all the strata down to the base 

 of his No. 3, in the " Encrinital Group of Burlington." It is 

 not possible to determine, from his section, the exact thickness 

 attributed to each individual stratum recognized, but their 

 aggregate is indicated in his table as about 100 feet, and the 

 lowest member, No. 1, is about 60 feet. 



In 1858 Hall's report on the Geology of Iowa was published, 



* Presented in abstract to The Academy of Science of St. Louis, No- 

 vember 6, 1899. 



f Rep. on Geol. Wis., la., and Minn. 92. (Philadelphia, 1852.) 



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