150 



Report of the State Geologist. 



" Macrodon Hamiltoniw, Actinopteria Boydi (?), Actinopteria sp. (?), Modio- 

 morpha subalata (?), Leptodesma sp., Stropkodonta perplcma." 1 The altitude 

 of this cut, taken from the profile of the New York, Ontario and Western 

 railroad, is approximately 1,560 feet A. T. This locality is three and one-half 

 miles west of south of Lyon brook bridge, and the difference in altitude 

 between the base of the red shale and this cut is 348 feet. If the dip for 

 the distance is sixty feet per mile, then the thickness of the rocks is 558 feet, 

 all of which may be regarded as belonging in the Oneonta formation. 



XLI C 2 . One-fourth mile southeast of Summit station, or five miles 

 from Oxford station, is another railroad cut, through greenish and olive shales 

 and sandstones, which reveals a thick concretionary stratum. Fossils are not 

 uncommon in these rocks, the most abundant species being At/rypa reticularis 

 (Lin.), Dal., while u P roductella hirmta, Spwifer mesacostaUs, and other 

 species" have been reported. 2 From the railroad profile the altitude is 1,616 

 feet A. T., or fifty-six feet higher than the cut at C 1 , which is probably near 

 the top of the Oneonta formation, for at C 3 no red or coarse greenish-grey 

 rocks were seen, and the Summit beds have been referred to the " Lower 

 Chemung group." 3 



The extensive stone quarries of the F. G. Clark Company, at Oxford, in 

 which specimens of Amnigenia CatsMllensis have been found, and the Miller 

 quarry at South Oxford are both in the Oneonta formation, and were fully 

 described by Clarke in the Thirteenth Annual Report, to which the reader 

 is referred for an account of the excellent flagging stones of this formation. 4 

 The picture of the Clark quarry shows the massive character of this 

 sandstone. 



Greene. 



To the southwest of Oxford is the township of Greene, which is crossea 

 diagonally from the northeast to the southwest by the Chenango river. The 

 Oneonta formation follows the river valley as far south as the village of 

 Greene, but the remaining and greater portion of the township is covered by 

 jocks which, on the new Geological Map of -New York, are placed in the 

 Chemung formation. The northern half of this township was fully described 

 by Clarke, 5 who referred the greenish fossiliferous shales and sandstones 

 overlying the Oneonta formation to the Chemung. Southeast of Greene 



1 Loc. lit., p. ii, .'id paragraph. 



• Ibid , p. ii, 4ili paragraph. 



3 Ibid., mid compare the section at the bottom of the page 



• Ibid , pp. 530-542. 



'■• Thirteenth Annual Report Slate Geologist [New York|, pp. 542-546. 



