434 H. F. Bain — Limestone at Bethany, Missouri. 



shown on Grand River. Bethany is but a few miles beyond 

 the Iowa border and along Big Creek at this point the same 

 beds, seen first in central Iowa, are well exposed. It was at 

 Bethany that Broadhead* first studied the limestone. As now 

 exposed the beds yield the following sequence, along a small 

 tributary of Big Creek running through the town. The first 

 exposure, which shows the top of the Bethany, is near the rail- 

 way bridge north of the depot, the top of the limestone being 

 at about 888 A. T. 



6. Limestone, fragmental, loosely cemented, with many speci- 

 mens of Meekella striatocostata, Chonetes vemeuiliana, 

 Productus costatus, Athyris subtilita, Productus longi- 

 spitms, Spirifer cameratus and Dielasma bovidens 6 



5. Shale, clayey, green to drab with thin bands of limestone 2 



4. Shale, clayey, drab to black ._ 2 



3. Limestone, drab blue, two ledges, 9 and 3 inches thick 1 



2. Shale, black 1 



1. Shale, black to drab, with irregular nodules and thin layers 



of impure black limestone carrying large well-formed Pro- 

 ductus cora, Productus nebrascensis, Athyris subtilita, Mya- 

 lina subquadrata (?), Schizodus, sp. ? In the shale itself 

 are Myalina subquadrata, Productus nebrascensis, Athyris 

 subtilita, Rhombopora lepidodendroides and plates of 

 Eupachycrinus verrucosus _. 6 



Below this exposure for some distance there are no outcrops, 

 but in the western part of town there are some small quarries 

 which show the following beds : 



Feet. Inches. 



6. Shale, clayey, drab _.. 6 



5. Shale, calcareous, transition beds, with Spirifer 



cameratus, Meekella striatocostata, Productus 

 cora, Productus costatus, Productus nebrascensis, 

 Rhombopora lepidodendroides, Fistulipora nodu- 

 lifera, Myalina subquadrata, Athyris subquad- 

 rata, and Derbya crassa 1 6 



4. Limestone, heavy ledges, many Fusidina cylin- 



drica . 2 10 



3. Limestone, thin-bedded with many of the fossils 



collected above, particularly Athyris subtilita, 

 Productus cora, Productus costatus, Spirifer cam- 

 eratus, and Meekella striatocostata _ 10 



2. Unexposed _ _ 8 



1. Limestone, thin-bedded, with Productus costatus, 



Productus cora, Productus longispinus, Athyris 

 subtilita, Spirifer lineatus, Spirifer cameratus, 

 Spirifera kentuckensis, Chonetes verneulianus, 

 Hustedia mormoni, Dielasma bovidens and Fusu- 

 lina cylindrica _. 1 2-15 



* Trans. St. Louis Acad. Sci., vol. ii, pp. 311, 1862; Mo. Geol. Surv. Iron Ore 

 and Coal fields, Pt. II, p. 77 et seq. 1873. 



