DETAILS OF STRATIGRAPHY 365 



Section along Noix Creek at Louisiana, Missouri 



Feet 



3. Upper Devonian shale: Dark colored fissile shale, with few fossils 3 



A break in sedimentation. 

 2. Edgewood limestone (Noix oolite) : Light gray oolite, in three layers, 

 containing the greater number of the fossils indicated in column 3 of 



the table on page 365 g 



A break in sedimentation. 

 1. Orchard Creek shale: Bluish to greenish-gray shale, with few or 



no fossils 9 



The Bowling Green limestone is absent at the place where the above 

 section was made, but 2 to 4 feet of this limestone is present above the 

 oolite less than 1 mile west, and 6 to 8 feet of the Bowling Green lime- 

 stone overlies the oolite at the mouth of Buffalo Creek, iy 2 miles south- 

 east of Louisiana. 



As is common with oolite faunas, the shells in the oolite at Louisiana 

 are usually distinctly smaller than those of corresponding species from 

 the limestone that is not oolitic. They are often so silicified that perfect 

 specimens of even the smallest forms can be obtained by dissolving the 

 limestone with weak acid. The fossils from the oolite at Louisiana are 

 indicated by a cross to the right of the name, in column 3 of the table 

 given below. A cross opposite the name in column 2 of the table shows 

 that the species was found in the Edgewood limestone near Edgewood, 

 Missouri, while a cross opposite the name in column 1 indicates the pres- 

 ence of that species in the Edgewood limestone near Thebes, Illinois. 



Comparative Table of Fossils from the Edgewood Limestone 



Localities: Column 1, near Thebes, Illinois; column 2, near Edgewood, Mis- 

 souri ; column 3, Noix oolite near Louisiana, Missouri 



Calapcecia favositoidea Savage y 



Calvinia edgewoodensis Savage y 



Clathrodictyon vesiculosum Nicholsen and Murie X 



Favosites subelongus Savage w 



Haly sites catenulatus Linnseus 



Lyellia thebesensis Foerste y 



Zaphrentis cf. ambigua Savage y 



Zaphrentis subregularis Savage x 



Zaphrentis cf. stokesi Edwards and Haime X 



1 In/pa proemarginalis ( Savage) X 



Atrypa putilla (Hall and Clarke) x 



Atrypa tubulistriata . Savage X 



Brachyprion stropheodontoidcs Savage 



Brachy prion latisculptilis Savage 



(2) 



(3) 



X 



X 



X 



X 



X 



X 





X 



X 



X 



X 



X 



X 



X 



X 



X 



X 



X 



X 



X 



X 



X 





X 



X 



X 



