Pbossee and Cumings — -Lower Silurian Sections. 



of the station. Plate IX gives a view of this locality, looking eastward, 

 the cut being through the gneiss, and the cliff above the street being com- 

 posed of the lower part of the Calciferous sandrock. 



Canajoharie and Palatine Bridge. 



Along the Mohawk river on both the north and south sides, in the 

 vicinity of Canajoharie, are numerous outcrops of the Calciferous sandrock. 

 The exposures are in the upper part of the formation and belong in the 

 substage which was named the Fucoidal layers by Vanuxem,* who stated 

 that the best exposition of these layers " was at Canajoharie. "f 



Shaper Quarry. 



In the western part of Canajoharie village is the Shaper quarry, which 

 is extensively worked, exposing some forty-four feet of the Fucoidal layers. 

 The following section from the level of the West Shore railroad to the top 

 of the quarry gives the thickness of the different layers as exposed in this 

 quarry : 



No. 15. Soil on top of quarry. 

 14. 3 feet, 9 inches. 

 13. 2 " 

 - 12. 2 " 



11. 2 " 2 

 10. 2 " 7 

 9. 1 " 4 



8. 1 " (Not fucoidal.) 



7. 4 " 4 " (Not fucoidal.) 



6. 2 " 4 u (Fucoidal markings very conspicuous.) 

 5. 7 " 



4. 4 " 7 " (The top of this layer forms the floor of the 



middle part of the quarry and is its 

 main ledge.) 



3. 4 " 



2. 3 " 3 " (Lowest layer in the quarry.) 

 1. 20 " (From the bottom of the quarry to the 



level of the West Shore railroad.) 

 The above section gives a thickness of forty feet and four inches of 

 Calciferous sandrock in the quarry, or a total of sixty feet and four inches 



* Fourth Annual Report Geological Survey of the Third District [New York] (Assembly Document No. 50, 1840), p. 369. 

 t Geology of New York, Part III, 184a, p. 87. 



