SECTION DONDERBERG. 



Plate 5. 



This commences at Stoney Point and ends half 

 a mile beyond the turn of the river, above " Cald- 

 well's Landing," on the west side of the Hudson. 



1st Granite. — (See plate 5, fig. 1.) 



2nd Gneiss. — (See plate 5 fig. 2.) These rocks 

 are similar to those described before. 



3d Talcose Slate. — (See plate 5, jig. 3.) This 

 is one of the rocks which the older Geologists 

 called Argillite ; it is a slaty rock, of a dark slate 

 blue colour, with sometimes, the shining lustre of 

 talcy matter in its seams : with a natural rhom- 

 boidal and splintery fracture ; it rests on Gneiss 

 at this locality. 



4th Limestone. — (See plate 5, fig. 4.) This is 

 what the older Geologists called Transition Lime- 

 stone ; no fossils have been found at this locality. 

 In the veins, is handsome Talc, of a light colour 

 with a good lustre. This Limestone is not fit to 

 use as a marble, but is excellent for burning lime ; 



