REPORT OF THE STATE PALEONTOLOGIST 1902 1213 



ridge, designated "vein B," [pi. 12, fig. 3 and 4], with a strike 

 of n. 60° e., dip 30° n. w., appears first as a small wedge-shaped 

 block in the south side of the Middle quarry, the block increas- 

 ing in size and hight to the southwest till it becomes of the 

 same prominence as that bearing the original vein. The north- 

 westerly dipping Wilbur limestone on the western surface of 

 this "vein B" block is broken in the trough at the bottom of 

 the slope by a small fault, which separates it from the south- 

 easterly dipping Wilbur limestone that covers the eastern limb 

 of the anticline of the Taylor's corner vein. This small fault 

 coincides with the axis of a synclinal fold, which, though here 

 broken, had a complete trough, now eroded, at no great distance 

 to the southwest. Northeastwardly the amount of displace- 

 ment along the fault plane increases rapidly, and at the Hill 

 and Level quarries the two broken edges of the cement forma- 

 tions are widely separated, how far is as yet undeterminable. 

 At any rate this fault affords a clue to the puzzling relations of 

 the Glory Hole vein and the eastern anticline. 



2 The eastern anticline 



At the southern end of the Vlightberg the Taylor's corner 

 vein of cement [pi. 12, fig. 3 and 4] is bent up into a sharp anti- 

 clinal fold of northeasterly trend, the crest of which is distin- 

 guished in the rounded ridge, covered by Wilbur limestone, that 

 extends northeastward from the old Taylor's corner engine 

 house. The southern end of this anticline is cut off by erosion, 

 and a good section of it can be seen along the southeast-north- 

 west portion of Union street [pi. 12, fig. 4]. The eastern limb of 

 the anticline is very narrow at this point, as it extends only to 

 the fault in the bottom of the first trough east of its crest, a dis- 

 tance of perhaps 40 feet. The western limb is of much greater 

 width, and, with a dip of about 45° to the northwest and strike 

 of n. 70° e., it slopes under the high overhanging escarpment of 

 the Manlius and Coeymans limestones. This vein was ex- 

 cavated for a considerable distance underground and it was 

 found to be abruptly truncated along its entire western edge 

 by a small overthrust fault of northwest dip and northeast 

 strike [pi. 12. fig. 3] by which the Ohamplainic sandstones were 



