32 NEW YORK STATE MUSEUM 



Bucks Bridge they are best seen at very low water in the Grass 

 river (at locaHty 57). Again on the Raquette below Sissonville 

 they have a small exposure 10 feet above the basal beds at locality 

 29. West of our limits about one-half of a mile (locality 68) 

 similar beds occur on the James Dandy farm and in the adjacent 

 road gutters; while north of the quadrangle some 60 rods (locality 

 15; Waddington sheet) layers resembling those at Madrid appear 

 in the brook that runs near Dailey Ridge church, but this last iden- 

 tification is not wholly certain. 



Upper division. What are believed to be the highest beds of the 

 Bucks Bridge formation are splendidly shown in the bare ledges 

 on Trout brook at the Rutland Railway (locality 12), where 

 approximately 25 feet of these strata are present below the Ogdens- 

 burg dolomite with a disconformable contact. These beds are sandy 

 and silicious dolomites, rather flaggy in structure and highly fucoi- 

 dal as they weather, but still distinguishable from the basal division. 

 They seem much like the beds that immediately succeed the middle 

 division below Hewittville bridge, and it is likely that the base of 

 this Trout brook section actually ties to the top of that one, though- 

 of course still other unknown beds may intervene. Inasmuch as 

 there are, below the Ogdensburg at the Hewittville lower mills, 

 some quite different calcilutites next to be described, it would seem 

 that these ought to be present somewhere at this locality. A very 

 small development of similar calcilutites does appear on the east 

 bank just north of the preceding (locality 13) about 50 rods below 

 the railway bridge, dipping under the basal Ogdensburg on the 

 opposite side of the brook. Again in the railway cutting next west 

 (locality 11) are sandy layers and calcilutites forming a low anti- 

 cline, which may be in part of the Hewittville horizon, but the 

 examination of these was hurried and they may really be Ogdens- 

 burg. These beds are surely absent from the exposure by the rail- 

 way bridge, thus indicating an unconformity by pre-Ogdensburg 

 erosion. The fucoidal beds reappear in several exposures farther 

 down Trout brook (localities 13 and 14), with a short, concealed 

 interval between them and the Ogdensburg rocks at the road bridge 

 (13). No "Hewittville" layers are seen here, though they may 

 possibly occupy the covered space. 



Fossiliferous and fucoidal beds like the above form the hill slope 

 east of Brandy brook not far below the Andrew Walker bridge 

 (locality 5), just over on the Waddington quadrangle. These beds 

 dip strongly west by north, indicating one limb of a fold that in 



