Kindle — Niagara Limestones of Hamilton County^ Ind. 221 



Aet. XX YI. — The Niagara Limestones of Hamilton County^ 

 Lndicvna; bj Edwaed M. Kindle. 



Hamilton County is located slightly north of the geos^raphi- 

 cal center of Indiana. The drift in this part of the State is so 

 deep that the Paleozoic rocks are rarel}' exposed at the surface. 

 Only a few outcrops occur in the county. The raost extensive 

 exposure is the one at Connor's mill on White river, five miles 

 above Xoblesville. Two small quarries southwest of Fishers- 

 ville afford an equally good opportunity to study the Paleozoic 

 rocks of the county. Several days were spent by the writer in 

 collecting from the beds exposed at these two localities. 



Connor'^s mill. — The outcrop at Connor's mill consists of a 

 hard, light buff dolomite, which is exposed for two or three 

 hundred yards below the dam. The beds show a dip of 20° to 

 40° to the southwest. Above the dam one-third of a mile the 

 limestone outcrops again, dipping 30° to the northwest. 



The following is a list of fossils collected from beds exposed 

 below the dam :* 



Favosites favosus r. 



Streptela&ma cf. calicula r. 



Amplexiis shurnardi . . r. 



Eacalyxjtocriniis cf. crassus r. 



Conchidiinn midticostatum . a. 



Conchidium sp. ]•. 



A trypa reticularis c. 



Stropheodonta profunda _ c. 



Leptaena rhomhoidalis : _. c. 



Meristella sp. . r. 



ISpirifer n obilis ... r. 



Trematosplra camura r. 



Spirifer 7iiagarensis . c. 



Spirifer cf, crispa r. 



DalinaneUa elegantala r. 



Plectambonites cf. sericea r, 



Conocardium sp r. 



Platyostoma cf. niagarense ... c. 



Spherexochus romingeri a. 



Calamene n iagarensis c. 



Illaenus insignis c. 



Phacops cf. trisulcatus c. 



Encrinurns sp. c. 



FisJiersburg gxtarries. — Southwest of Fishersburg one-half 

 mile a very pure white sandstone has been quarried for glass 



* The species listed will be described and figured in a future paper. 



