REPORT OF THE STATE PALEONTOLOGIST 1901 



525 



is represented by the accompanying diagram where the strata 

 are numbered from top to bottom by the figures 1-13 inclusive. 

 The region is a country of sandstones and flags with interbedded 

 conglomerates and the nature of these beds is sufficiently 

 explained in the matter on the diagram. It will be noted that 

 in this series there are two well defined and heavy sandstones 

 and two equally conspicuous and heavy conglomerates. The 

 lowest of these sandstone beds is stratum no. 13, the Cuba 

 sandstone. 600 feet above it lies stratum no. 8, the Wolf creek 

 conglomerate. Above the latter 200 feet, is the Mount Hermon 

 or Salamanca conglomerate, no. 6, and from there the section 

 rises about 200 feet to the Olean conglomerate, no. 2; the high- 

 est sediment in the series being the calcareous shales lying on 

 the top of the last named conglomerate which has been termed 

 the Olean shale. Intervening between the Wolf creek con- 

 glomerate and the Mount Hermon sandstone the beds are red 

 and green shales interbedded with 

 flaggy sands, to which it has been 

 proposed to apply the term Cat- 

 taraugus beds. The validity and 

 usefulness of the distinctive term 

 for these strata which represent 

 those at times referred to the 

 Catskill formation because of 

 their red color and doubtless a 

 western continuation of Catskill 

 sedimentation is very clearly in- 

 dicated by the paleontologic evi- 

 dence which they have furnished. 

 For the shales above the Mount 

 Hermon sandstone and thence to 

 the base of the Olean conglomerate it has been suggested that 

 still another distinctive term would be required, but it is not 

 clear that stratigraphic evidence would favor such determina- 

 tion. The propriety of the subdivision could be established by 

 the variation in the fossil contents, should this appear to be of 



1 









2 o 



O 



3 



-a 



5 



o 



o 



bo 



O 



7 







c 



H o 



o 



9 



10 



It 



12 



.3- 



Olean cql 



Mt. Hermon or 

 Salmanaca cql. 



Wolf creek cql. 



Cuba sndstn 



