C. R. Stauffer — The Minnesota Devonian. 403 



Devonian (Cedar Valley limestone) 



10. Limestone, gray to brown, thin bedded, probably 



somewhat disturbed 4' 0" 



9. Limestone, gray to white, usually weathering to 

 brown, fairly massive. It contains a few fos- 

 sils among which are the following : 

 Crinoid stems (r) 



Leptaena rhomboidalis (Wilckens) ? (r) 

 Stropheodonta demissa (Conrad) (r) 

 Nucula sp. (r) 

 Pleurotomaria sp. (r) 



2' 0" 



8. Limestone, gray to brown, with occasional traces 



of fossils I' 3" 



7. Limestone, gray, fairly fossiliferous 

 Crinoid stems (c) 

 Athyris fultonensis (Swallow) (c) 

 Cyrtina hamiltonensis Hall (c) 

 Spirifer orestes Hall and Whitfield (c) 



0' 10" 



6. Limestone, gray to brown, containing indistinct 



masses resembling stromatoporoids 0' 8" 



5. Limestone, gray to white, compact and apparently 



containing no fossils 2' 5" 



4. Shale, green to gray, calcareous, irregular in 



thickness , . 0' 6" 



3. Limestone, gray to white, compact, rather mas- 

 sive. It contains a few fragmentary fossils. 2' 4" 



2. Covered interval 1' 0" 



1. Limestone, gray to brown, apparently lower than 



the beds given above » 7' 0" 



Recent drilling in this vicinity indicates that the total 

 amount of the high-grade white limestone may exceed 

 sixty feet. How much of the brown magnesian limestone 

 may be interstratified with it is not definitely known but 

 it is probable that there is as much in the deeper strata as 

 there is mingled with the beds exposed at the surface. 

 Certain layers of the limestone of this locality resemble 

 the lithographic beds of Iowa and they may possibly 

 represent the same horizon. 



Higher beds occur in the vicinity of Austin. It is quite 

 probable, however, that there is a covered interval of 

 importance between this outcrop and the one just dis- 



