Kindle — Niagara Lvmesiones of Hamilton County^ Ind. 223 



making. It is a fine-grained, massive, loosely-cemented rock, 

 crumbling easily. A buff dolomite, having the same lithologi- 

 cal characteristics as the outcrops at Connor's mill, rests upon 

 the sandstone. The line of contact between the two forma- 

 tions is clearly shown in the quarry and is seen to be a very 

 irregular one, resembling unconformity. The sandstone is 

 believed however to be a local lense. Such lenses are known 

 at other localities in the State where both the upper and lower 

 contact with the I^iagara limestone is clear. The limestone 

 on either side of the projecting mass of sandstone extends 

 below the surface of the pool which fills the quarry. The 

 limestone beds show a dip of about 35° to the. north. 



A careful search failed to discover any fossils in the sandstone. 



The fauna of the limestone as well as its physical characters 

 indicate that it belongs to the same formation as the beds at 

 Connor's mill. 



A comparatively short time was spent in collecting from the 

 Fishersburg quarries, and for this reason the following list of 

 fossils from that locality includes fewer species than the pre- 

 ceding list: 



Streptelasma cf. ccdicula r. 



Favosites niagarensis _ c. 



JSpirifer cf. radlatus r. 



Conchidiani tnidtlcostatum _ a. 



Meticidaria cf bicostata r. 



Orthothetes suhjdamis r. 



StTopheodonta sp -. c. 



Meristella sp. _ c. 



Nucleospirapisforinis r. 



Leptaena rhomboidalis , r. 



SpirifernohUis _ _.. r. 



Illaenus insign is r. 



tSplierexochus romingeri r. 



Phacops cf. trlsulcatus . _ r. 



JEncrinurns s}) - - r. 



Correlation. — Richard Owen described the outcrop at Con- 

 nor's mill in his report published in 1863,'^ but offered no 

 opinion as to the age of the beds. The earliest reference to 

 the age of these beds occurs in a report on the geology of 

 Hamilton countyf by Dr. R. T. Brown, who considered them 

 to be of Devonian age. No paleontological evidence was 

 offered in support of this opinion, the author of the report 

 stating that " the outcrops of rock in Hamilton county are 



* Eep, Ind. Geol. Surv. for 1859-62. p. 102. 

 t 14th Ann. Rep. Ind. Geol. Snrv., 1884, p. 27. 



