438 Trans. Acad. Sci. of St. Louis. 



8. Unexposed, probably a softer, red calcareous shale cov- 

 ered with talus. 



Thickness, 6 feet. 



9. Red limestone with greenish blotches, the green color 

 becoming somewhat more marked towards the top, capped by 

 a conspicuous chert band six to eight inches in thickness. In 

 the midst of this bed, besides some scattered chert masses, 

 are two conspicuous, continuous chert bands, each four inches 

 in thickness, one three feet and the other six feet from the 

 base of the bed. Fossils are abundant, the fauna being typic- 

 ally Kinderhook with Spirifervernonensis, Athyrislamellosa, 

 Leptaena rho7nboidaUs, Productus, Evactinopora radiata, 

 Cyathaxonia, etc. This red, more or less argillaceous lime- 

 stone formation has a rather wide geographic distribution, 

 and always contains its own characteristic fauna. In the 

 railroad cut between Sulphur Springs and Kimmswick, two 

 miles north of Glen Park, this bed is much better exposed and 

 more highly fossiliferous than in the Goetz quarry section. 

 It is again exposed near Fern Glen station on the Missouri 

 Pacific Railroad, on the Meramec river, twenty miles west of 

 St. Louis. A small collection of its characteristic fossils, in 

 the same reddish matrix, has been examined from Jersey 

 County, Illinois, and the formation undoubtedly extends as 

 far north as that. Because of its good exposure at Fern 

 Glen, the formation may be called the Fern Glen formation. 

 In the Goetz quarry section the formation undoubtedly in- 

 cludes also the unexposed bed No. 8. 



Thickness, 8 feet, 6 inches. 



10. More or less crystalline, greenish gray limestone, with 

 three continuous chert bands. This bed does not differ essen- 

 tially from the subjacent layer except in color, and even this 

 bed is slightly red below, the change from the dominantly 

 red to the dominantly gray or green being a gradual and not 

 an abrupt transition. Fossils are less abundant than in the 



bed below. 



Thickness, 7 feet. 



11. Limestone similar to that below, but entirely lacking 

 the red color. Much chert present, usually in more or less 



