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NEW YORK STATE MUSEUM 



eastern side of the mountain is strongly 

 diversified by numerous faults. The axes of 

 the folds approach each other toward the 

 southwestern end of the mountain, where 

 they are cut off by a transverse fault (no. 18). 

 As might be expected, the folding is likewise 

 more intense in this locality, as will be seen 

 by a comparison of sections 21 and 25. The 

 general pitch of the Becraft syncline is 

 toward the southwest. But there is also a 

 local pitch to the northeast in the strongly 

 folded southwestern area. Thus a basin- 

 shaped appearance is produced, with the suc- 

 cessive rimming around of the outcrops of 

 the lower about the higher strata. 



The faulted district begins on the north- 

 eastern corner of the mountain. Here, as 

 shown by the following section [section 3], 

 the throw is comparatively slight. Fault no. 

 1 is a gravity fault the hade of which could 

 not be accurately determined, but appears to 

 be vertical; the strata are abruptly turned 

 up at the downthrow side. This feature is 

 very readily seen in the hillside. The 

 amount of vertical displacement here is 

 about 20 feet. Fault no. 2 is a thrust fault 

 with a very oblique fault plane, the hade 

 being about 70°. The vertical throw is from 

 70 to 80 feet and the horizontal displacement 

 about 300 feet. From the fact that the fault 

 is traced down the hillside, it appears curved 

 on the map. 



Fault no. 3 is a gravity fault, a block east 

 of it having dropped down. It can be fol- 

 lowed along a wood road in a depression, 

 with the Coeymans on the east and the Man- 

 lius on the west of it, both dipping west- 

 ward, the Manlius at a greater angle. The 



