FIFTH REPORT OF THE DIRECTOR I908 



l8l 



rocks is probably due to a cross folding that combines with the 

 normal fold, a frequent cause of brachyanticlines. 



A nearly continuous line of small elliptic anticlinal inliers of 

 Cambric rocks (mostly limestone), gneiss patches and Trenton 



Fig. 21 Inliers of gneiss 

 Cambro-Siluric limestones 



at Newburgh, X. Y. Scale 5 m 



.A 



A 





\ 





A 



/ 



A 



























Georgian 



and 



in Lower Siluric s'.ia 



limestone extends in southwest direction from Stissing mountain 

 toward and beyond Newburgh. In the close neighborhood of 

 Newburgh there are no less than three small gneiss and one Cam- 

 bric limestone inliers 1 [see text fig. 21], and a series of small inliers 

 of gneisses and Cambric rocks extends thence along the north side 

 of the Skunnemunk mountains. Ries gives four sections through 

 one of these (Bull hill) which clearly show its composition of an 

 open, normal anticline but also indicate that faulting may, to 

 some extent, have influenced the production of some of these inliers. 



x Su Rics, H. N. Y. State Geologist's Rept. for 1895. 1 



395- 



