Report of the State Oeoloqist. 265 



One half-mile southwest of the sandstone cliffs forming 498 H are 

 Button Falls in Button Creek. The cascade 50' or 60' in height is 

 composed of two falls and is just below the highway leading from the 

 "river-road" up the hill. The bluish argillaceous shales of this station, 

 498 I', are irregular in fracture and upon the whole not very fos- 

 siliferous. In the cliff at the foot of the falls and also in the bed of 

 the creek is a stratum which contains abundant fossils. Liorhynchus 

 muUicosta, Hall, is very abundant in this stratum, the shale in places 

 being almost entirely composed of these shells, many of which are very 

 much distorted. In the creek below both the first and second falls are 

 "pot-holes" one of which is four feet in depth and two feet in diam- 

 eter. The fauna so far as identified is as follows: 



Liorhynchus Tnulticosta, Hall. 



Amhocoelia xitnhonata, Conrad. 



NiicuUtes triqueter, Conrad. 



Nuculites ohlongatus, Conrad. 



Rhynchonella Sappho, Hall. 



Spirifer medialis, Hall (?). Small forms. 



Chonetes. 



Nucula bellistriata, Conrad. 



Sonialonotiis DeKayi, Green. Segments. 



Phacops rana, Green. 



Productella. 



Tellinopsis suhemarglnata, Conrad. 



Palceonello constricta, Conrad. 



Grammysia. 



Above the falls for one-quarter of a mile, the bed of the creek is 

 composed of shale which has been worn very smooth by the water. 

 Somewhat farther up the creek are ledges on the right hand or eastern 

 side which have been called 498 I^. The lithologic character of the^se 

 upper shales is similar to those of 498 I^. Fossils are not abundant 

 except in the lower part of the bluff. The following species have been 

 identified: 



Amhocoelia umhynata. Conrad. 



Tentacfidites. 



Chonetes scitula, Hall. 



The number of striae (50 ±) and general proportions agree in the 

 main with the figures of this species, with the exception of one speci- 

 men which is larger than any of the forms figured. 



Phacops rana, Green. 



Productella, 



Nuculites ohlongatuSy Conrad. 



