518 NEW YORK STATE MUSEUM 



As the dififerences in surface elevation between this limestone 

 and the outcrop of Niagara shale previously noted is but about 

 45-50 feet and the north-south interval between the two sta- 

 tions about 1 mile, it is evident that this is one of the layers, 

 if not the basal bed, of the series of Lockport dolomites. The 

 exposed thickness here is from 1-2 feet. 



Station 13. At the four corners due south of station 14 in 

 a field to east of road is an outcrop of gray, somewhat scraggy 

 dolomite, 3 feet. Elevation on topographic sheet approxim- 

 ately the same as that of station 14, the stratum probably lying 

 close on that exposed at former station. These scraggy dolo- 

 mites carrying some silicious nodules and silicified fossils (Favo- 

 sites, Stromatopora, etc.), their roughened surfaces due to 

 unequal weathering, are exposed at various points to the east 

 and west of this road north and south of the hamlet of Ogden 

 and from the elevation stated where they immediately overlie 

 the rock at station 13, through an interval of about 40 feet. 

 These outcrops are also to be observed freely throughout the 

 region cast and west, specially along the first east and west 

 road north of the Ogden road, and from there westward. 



Stations 12, 11, 10, G, 5 and 4. These very characteristic 

 scraggy dolomites vary little in texture and color. For the 

 most part the outcrops show the usual rough surface with con- 

 siderable chert often replacing the corals but so far as observed 

 other fossils than corals or Stromatopora are seldom present. 

 Here and there, as at station 11 on the north and south road 

 the first east of the Ogden-Churchville highway, the rocks have 

 a smoother, more homogeneous character and carry less chert. 

 This layer however appears to be one intercalated between 

 other layers of the more silicious material. Similar exposures 

 of these dolomites indicated for the most part by boulders 

 loose above concealed outcrops, are to be seen over the terri- 

 tory to the west, approximately along the boundary line 

 between the towns of Bergen and Sweden. 



Salina beds. The lower limit of the Salina in this section is 

 indicated by an outcrop on the road from Churchville to North 



