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NEW YORK STATE MUSEUM 



horizons within the Trenton limestone. The lower contorted zone, 

 whose base lies 144 feet below the top of the Trenton, is from 

 4 to 6 feet thick. It is visible only near the crest of the lower part 

 of the High fall (see accompanying plate) and in the upper end 

 of the gorge near Prospect village where the strata are highly in- 

 clined. The upper contorted zone, whose base lies 65 or 70 feet 

 below the top of the Trenton, is from about 5 to 12 or 15 feet thick. 

 It is well exhibited along the path opposite High fall from which 

 point it may be traced along the sides of the gorge for nearly 2 miles 

 to Prospect. 1 



The impure limestone layers of both the folded and nonfolded 

 portions average only a few inches in thickness and are separated 

 by thin bands of shale. Within the folded zone horizons the layers 

 are, in some cases, scarcely folded or broken ; sometimes they are 

 gently folded or tilted ; while most commonly they are highly folded 

 and fractured (figure 1). 



retft 



Fig. 1. The tipper contorted and broken zone as 

 seen along the footpath opposite the crest of High 

 fall at Trenton Falls. Drawn from nature. 



Numerous observations show the strikes of the contorted zone 

 folds to be from N. 50 E. to N. 65 ° E. or practically parallel to the 

 strike of the distinct folds in the Trenton formation in this region, 

 as well as parallel to the strike of the well-defined fault- fold line 

 passing through the village of Prospect (see geologic map). 



It should also be noted that these contorted strata occur only 

 in a very local district. As far as they can he ascertained they are 



J The interested reader should consult the write 

 Remsen quadrangle in N. Y. State Mus. Bui. 126. 



geologic map of the 



