1882.] ^^^ [Claypole. 



crossing a broad belt of Catskill at less than half a mile from the valley- 

 turnpike. This Catskill cap does not, therefore, extend so far west as the 

 road in question marked xx on Fig. 3, page 535. 



• Continuing our search we reached the point a, where the old and new 

 roads meet and, taking the former or northern one, we crossed to the 

 point marked with a cross. Here is a bold exposure of the Mansfield Red 

 sandstones standing with a dip of about 40° S. E. by S. This point is 

 almost exactly on the place where, according to the above-quoted map, 

 the edge of the cap of Catskill should lie. It is unnecessary to say that 

 no such material is there present. Not only are all signs of Catskill ab- 

 sent, but the whole thickness of the Chemung above the Mansfield red 

 beds must be put on before its presence is possible. Time at our com- 

 mand did not allow us to go back into the county through the woods to 

 determine at what distance this high dip disappears and the Chemung 

 beds flatten down to a level, but it is perfectly obvious that even if any 

 Catskill at all is here present it must be of small dimensions, and must lie 

 much further north than it is represented on the map. With a dip of 40° 

 at the point and about 500 feet of Chemung rocks missing, the existence 

 of any such Catskill cap is almost a physical impossibility. 



I may add that the evidence, so ftir as the short time at my command 

 allowed me to examine it on the spot, is strongly against the existence of 

 any Catskill west or north of Franklindale. 



It appeared certain that the wreckage of the Mansfield Red beds, which 

 is strewn over the hill-side along this part of the road, had been mistaken 

 for fragments of Catskill, the source of which was supposed to exist higher 

 up the slope. To account for the extension of the color so far to the west- 

 ward is less easy, because, 'as mentioned above, not a fragment can be 

 found upon the road marked v/ith a double cross and lying east of West 

 Franklin. 



D. — On two small patches of Catskill represented near Leroy, on the map in, 

 Report G, of the 2d Geological Survey of Penna. 



In connection with what has been written above, I may remark that not 

 a scrap of evidence can be found in favor of the existence of either of the 

 two round patches of Catskill rock represented on the map, one at Leroy 

 and the other about one mile to the westward. The place in which the 

 former is marked is on Upper Chemung beds, of about the horizon of the 

 Mansfield Reds (which may have led to the error), and standing very 

 NEARLY vertical. The place of the other is near or at where the red 

 sandstone with fucoids (mentioned in an accompanying note), which lies 

 between the Mansfield Red beds and the Orammysia elUptica bed, crosses 

 the valley road. Hence, perhaps, this mistake. *The beds here are un- 

 doubtedly Chemung, and more than 100 feet below the summit of the 

 group. 



If this confusion was the real cause of the error it is the more surprising 



