44 NEW YORK STATE MUSEUM 



west. East of the fault it is to the northeast. As the boundary 

 swings round the western slope of the Hook spur, the dip changes 

 from northeast to north and northwest, and at the northern end 

 of the spur from northwest to north. On Shenandoah mountain 

 in the East Hook, near the quadrangle boundary, the strike is 

 n. 49° e. and the dip 50° n. w. This general strike and dip 

 holds to Shenandoah. North of Shenandoah the dip changes to 

 north. The quartzite disappears at the east under a mass of kames. 

 Readings made a mile east of Bailey's gave a strike of s. 70° e. 

 and a dip of about 18° n. e. 



The quartzite thus follows the folds of the gneisses and, although 

 eroded and disturbed by faulting, tends to fringe the spurs and 

 hollows along the northern margin of the Highlands. 



The conformable series at West Fishkill Hook. East of the 

 normal fault that extends along the east road into the mountains, 

 the basal quartzite is overlain by bluish-gray limestones having 

 the same dip as the quartzite. The nearest approach to actual con- 

 tact is in Ward Ladue's orchard, a few feet north of Jones's barn. 

 The pinkish ledges of granular quartz rock are only a few feet 

 away from the limestone and the two are seen to be in strict con- 

 formity. The limestone, which is greatly broken up into large blocks, 

 can be followed to the south and east. In both directions it is suc- 

 ceeded by the quartzite. The limestone swings round the north- 

 western slope of the Hook spur and appears in numerous ledges 

 in the fields southeast of W. L. Ladue's barns. Here it is con- 

 formably overlain by gray calcareous shales. At the eastern side 

 of the pasture, south of the orchard on W. L. Ladue's farm, the 

 shales dip to the northwest and north. A little farther west, in the 

 center of the field, the interbedded shales and shaly limestones have 

 buckled into a low anticline. 



Fig. 13 Generalized section to show the conformable series of the Lower Cambric in the West 

 Hook district. Distance approximately one-third of a mile 



Fossils from the quartzite and overlying limestone. With the 

 exception of a few worm borings found In the quartzite along the 

 west road from the West Hook into the mountains in the summer 



