Claypole.J 670 April 6, 



glomerates of the southern counties containing certain fossils were referred 

 to and arranged with the Chemung Group, while those from other locali- 

 ties, but without fossils, were referred to Carboniferous age. This latter 

 reference arose from finding some ferruginous beds supposed to be out- 

 liers of the red sandstone of Tioga, near the summits of some of the hilla 

 and below the conglomerates. These have since been proved by their con- 

 tained fossils to belong to the Chemung Group, and it has not yet (1871) 

 been demonstrated that the red sandstone of the adjacent part of Pennsyl- 

 vania does occur within the limits of the south-western counties of New 

 York. 



"To a very great extent the conglomerates have been ascertained to be- 

 long to the Chemung Group, and to contain numerous fossils of that forma- 

 tion, while in some localities at least two hundred feet ot shales and shaly 

 sandstones, charged with Chemung fossils, lie above the conglomerates. 

 So many localities have now been examined that we may conclude that all 

 the conglomerates of the southern counties are of the age of the Chemung, 

 but from the great difference in character of the fossils from different 

 localities, it may not be regarded as proven that these beds are all of the 

 same horizon. 



"The relations of some of the outlying conglomerates south of Clean in 

 New York and the adjacent parts of Pennsylvania in McKean county, to 

 the Chemung Group and Coal Measures have not yet been satisfactorily 

 determined." 



Mr. Carll in Report III has given a minute account of the Panama con- 

 glomerate at its several exposures in Chautauqua county, New York, and 

 has pointed out its peculiarities. He has also given a list of fossils obtained 

 from it, which agrees, so far as the species were determined, with that given 

 by Prof. Hall (Geol. 4th Dist. p. 391), except in one point. The following 

 are the lists : 



Prof. Hall's list. Mr. Carll's list. 



Buomphalus depressus Euomphalus depressus 



Cypricardia rhombea Cypricardia rhombea 



Oypricardia contraota ' Cypricardia contracts 



Spirifer disjuncttis 



Mr. Carll does not give his locality, but as he describes a quarry four 

 miles north of Panama, it may be inferred that he obtained some of them 

 there. This is the locality mentioned by Prof Hall. 



One curious fact is the great discordance between the two accounts of 

 the rock. Prof. Hall says : 



"Fossils are exceedingly rare in this rock, having been seen in one lo- 

 cality only, four miles north of Panama." 



Mr. Carll says : 



"One of the exceptional features of the Panama rock is the great abun- 

 dance of fossils found associated with it, and even in the pebble mass itself." 



Probably, judging from the resemblance between the lists given above, 

 the abundance of fossils is a local character of the rock. In this way we 

 may perhaps reconcile the two accounts. 



