REPORT OF THE STATE PALEONTOLOGIST 1902 977 



pared to its usual development in this region. His higher con- 

 glomerate is the Salamanca. 



The Salamanca, the Panama, the Pope Hollow and the Tuna 

 are the same conglomerate and Lesley's supposed third or 

 Subolean(?) conglomerate at Ireland near the head of Irish 

 brook is also an excellent outcrop of the Salamanca, here quite 

 massive. The confusion has mainly resulted from assuming 

 a regular dip for the Salamanca and then concluding that a 

 conglomerate found too high or too low at a given locality for 

 the calculated position of the Salamanca at that place belonged 

 to a different horizon. Dips, however, are not regular in this 

 region. A local northward reversal of dip occurs near the 

 mouth of the Tuna and again just southeast of Salamanca and 

 several small rolls or gentle irregular folds with northeast 

 southwest axes occur in the Salamanca area. These irregu- 

 larities render such dip calculations misleading. 



Kilbuck conglomerate lentil. On the Salamanca sheet there 

 is found in the Cattaraugus formation a third conglomerate 

 lentil lying 50 to 70 feet above the Salamanca conglomerate and 

 called by Mr Fuller the Kilbuck. It has much the same flat peb- 

 ble character as the underlying Salamanca. It is not over 10 to 

 15 feet thick as a maximum but in places is quite massive and 

 weathers into large flat blocks that, where topographic con- 

 ditions favor, form a pavement over considerable areas. It is 

 best developed northeast and east of Kilbuck and extends as 

 far east as the ridge at the head of Tenmile creek. It is also 

 found north of Salamanca and on the high ridge south of Sala- 

 manca and east of Red House brook as far south as the head 

 of Irish brook. A small area occurs on the ridge east of the 

 Tuna and north of the head of Leonard brook. It is thus seen 

 to be of local development, but has possibly added to the 

 difficulties of making correct correlations in this region. 



Probable unconformity. The top of the Cattaraugus formation 

 is difficult to determine with exactness in most places since its 

 upper portion consists of soft shales and it is succeeded by 

 other soft shales. Exposures are in consequence poor except 

 along roadways or pipe lines. Numerous measures, however, 

 that are deemed reliable have been obtained of the thickness 

 of that part of the formation which lies above the top of the 



