1892.] PROSSER THE GENESEE SECTION 5 I 



in the Carboniferous and the first coal was noted at Instantur, 

 Penn. 



The above correlation apparently did not consider the previous 

 statement of Conrad, that the red sandstone on the Niagara and Gen- 

 esee rivers " has been referred by some geologists to the New, by 

 others to the Old red sandstone of Europe, with neither of which does 

 it bear the remotest analogy in the contained organic remains, or in 

 its relation to other rocks. Indeed it is far below the strata which 

 Mr. Richard C. Taylor, with great appearance of probability, refers 

 to the old red sandstone, and which are wanting in the third district 

 [this part of the third district formed the northern portion of the 

 fourth district in the following reports]." (') 



In the report of 1839 there was no direct reference to the correla- 

 tion of the preceding report ; but several local names were proposed. (^) 



The report for 1840 shows it had been decided that the thin 



layers of red sandstone and shale in Allegany Co., were stratigraph- 



ical equivalents of the rocks near Tioga, Penn., which had been 



referred by Mr. Taylor to the "Old Red Sandstone." Professor 



Hall wrote : " In tracing this rock westward, [from Tioga] we find it 



bordering the southern limits of the State, and in Allegany Co. 



extending north of the line." (') "I have not yet identified it beyond 



[west of] the Genesee. At this place near the mouth of Dyke Creek, at 



Wellsville, it contains fragments of bones resembling those at Tioga." 

 ^ ^ ^ ^ 



"This rock forms the limit between the Silurian and Carbonifer- 

 ous systems and may be regarded as one of the most important of the 

 whole series." (^) While in the final report Professor Hall said : " At 

 Wellsville, * * * * the rocks of this group [Chemung] terminate, 

 and are succeeded by some thin ferruginous strata of the Old Red 

 sandstone, and this again by grey diagonally laminated sandstone and 

 conglomerate." (°) 



In 1838 Professor Dewey stated that the dip "along the Genesee 

 river is one foot in eighty to one hundred feet. If we call it only one 

 in a hundred, in fifty miles, which is less than the distance to the 

 southern boundary of the State, the dip would place the rocks two 



(i.) ist Ann. Rept. Third Geol. Disc, N. Y., 1837, p. 167. 



(2.) 3d Ann. Rept. Fourth Geol. Dist., N. Y., where it is stated on p. 288 "With regard to 

 the arrangement and succession of rocks presented in the section accompanying the report of last 

 year, I have no important alterations to suggest." 



(3.) 4th Ann. Rept. Fourth Geol. Dist., N. Y., p. 393. 



(4.) Ibid., p. 394. 



(5.) Geol. N. Y., Pt. IV, 1843, P- 250. In connection with this see Prof. H. S. Williams' 

 description of a quarry at Wellsville, in Bull. U. S. Geol. Surv., No. 41, pp. 77, 78. 



