Prosser — Hamilton and Chemung Series. 187 



higher, on the road near the top of the hill are bluish shales (XXI A 2 ), con- 

 taining numerous fossils belonging in the Hamilton formation. In a few 

 minutes, specimens of the following species were found : 



1. Spvrifer mucronatus (Con.), Bill. (c) 



2. Cyrtma Harniltonensis, Hall. (rr) 



3. Amboccdia umboriata (Con.), Hall. (rr) 



About thirty-live feet higher on the road running southwest, shales and 

 thin sandstones outcrop which contain Hamilton fossils. This seems to show 

 that the summit of the high hill two miles northeast of Garrattsville is in 

 the Hamilton formation. 



The section may be tabulated as follows : 



SECTION OF HIGH HILL NORTHEAST OF GARRATTSVILLE. 



490' 





Shales at top of hill, Hamilton. 





35' 



455' 





A 2 . Bluish shales with Spirifer mucronatus. 





120' 





335' 





A 1 . Blocky shales. 





335' 



0' 





Level of Butternut creek, Hamilton. 



XXIV D 6 . Exposures of rather coarse, bluish shales at the lower end 

 of the gorge one mile northeast of Noblesville and in the first brook north of 

 that village. In these shales specimens of Liorhynchus are common, which 

 are probably I. mesacostalis, Hall, although there is a decided tendency in 

 the striae to remain on the sides of the shells as is the case with L. mulUcosta, 

 Hall. It is probable that these shales are in the Sherburne formation, 

 although they may perhaps represent the extreme upper part of the Hamilton. 

 Twenty feet higher is an excellent outcrop of bluish, argillaceous shales in 

 which no fossils were found. 



XXIV I) 5 . At the head of the gorge, two miles northeast of Nobles- 

 ville, are bluish and olive argillaceous shales, with an occasional thick stratum 

 of sandstone; these, according to the barometer, are 195 feet higher than D 6 . 

 In some of these shales specimens of Productella are abundant, and the fauna 

 would indicate the lower part of the Ithaca formation. Judging from several 

 observations in the southern part of New Lisbon, the dip is very heavy to the 

 southwest. The fauna, of D 5 is: 



