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NEW YORK STATE MUSEUM 



of the strata from the southwest, thus bringing the axis of 

 anticline 3 southwest of the overthrust [A, section 20] some 400 

 feet farther northeastward than its continuation north of this 

 fault [A, section 15]. By this overthrust the western limb of 

 syncline 3 [B, section 14, which corresponds to B, section 20] 

 steepened from 30° to 60°, making this syncline nearly a closed 

 fold. 



Going southwestward from section 20, the axes of the folds 

 continue to pitch downward, so that higher and higher strata 

 come to form the surface. This is well shown by a comparison 

 of sections 20 and 21 and by reference to the map. We pass 

 from the New Scotland beds, which in section 20 form the pres- 

 ent top of syncline 3 and anticline 2, to the Becraft and later 

 on to the Port Ewen, only the steep eastern limb of syncline 3 

 remaining as a narrow band for each of the lower formations. 

 The descent continues to fault 17, where an oblique shifting of 

 all the strata occurs. Thus, as shown in section 22, the over- 

 turned western limb of anticline 3 (the only portion of that 

 anticline remaining) is repeated, the repeated portion however 

 being more strongly overturned. From this fault the axes of 

 the folds rise southward, lower and lower members being pro- 

 gressively uncovered in the eroded anticlines. This is seen on 

 comparing sections 22 and 23, the position of the latter with 

 reference to the former being indicated by the dotted line in the 

 lower portion of section 22. On comparing anticline 23 of sec- 

 tions 22 to 25, this same southwestward rise or northeastward 

 pitch of the folds is shown. It is thus apparent that on oppo- 

 site sides of fault 17 the folds pitch toward each other, and it is 

 noteworthy that at this, the lowest point of the strata, the 

 stream which has its valley wholly on the Oriskany outcrops, 

 breaks across the strata to join Claverack creek. It is at this 

 point that the axis of anticline 2 is so low that the hard lime- 

 stones are carried below the present level of the stream on the 

 Oriskany outcrop, thus making this the natural point of exit. 



A comparison of sections shows, that the folds steepen toward 

 the northeast and also become more closely crowded. Hence 

 the lines marking the anticlinal and synclinal axes are closest 



