REPORT OP THE STATE PALEONTOLOGIST 1902 1053 



point the contact is not well exposed, but it soon appears again 

 in the cliff, which sweeps ont toward the Ancram road, and faces 

 it for over a mile to the high bluff at fault 21. All along this 

 side of the mountain, the Manlius, from its fine and uniform 

 texture and the perfect jointage developed in it, produces gen- 

 erally a vertical cliff. The Coeymans decomposes and makes 

 more or less steeply sloping surfaces, which are generally used 

 for grazing. The ledges project every now and then, making the 

 slopes unfit for cultivation. In some places the upper part of 

 the cliff is formed by the lower Coeymans, and at such points the 

 bluff stands out boldly and is of great hight. 



The contact may be conveniently studied along the wood road 

 which leads across the middle of the mountain, and branches off 

 from the Ancram road a little over half a mile south of the cross 

 road at Jonesburg. Where this road ascends through a little 

 ravine, the cliff on the left contains from 10 to 20 feet of Coey- 

 mans in the upper portion of its face, behind which the remainder 

 of the Coeymans forms a slope to the foot of the cliffs formed by 

 the New Scotland. Only the upper portion of the Manlius is well 

 exposed along the cross mountain road. It is compact and finely 

 stratified and contains Leperditia alta in its upper 

 portion. 



On both sides of the valley, bounded by faults 21 and 20, the 

 contact between the Manlius and Coeymans is well exposed in 

 the face of the cliff. No Stromatopora beds have been observed. 

 Since, however, the actual contact can be seen only in a few 

 points, owing to the steepness of the cliffs, it is not possible to 

 say whether this bed is absent over the entire western face of 

 the mountain or not. 



Near the junction of the Ancram road with the southern road, 

 the Manlius passes below the surface and does not appear again 

 till the schoolhouse, half a mile farther east, is reached. Here 

 the Manlius is seen just south of the road, standing vertically, 

 the contact with the Coeymans, though not exposed, being close 

 to the southern margin of the road. Just east of this, fault 18 

 has thrown the contact 600 feet to the south, the dip of the 

 strata being still vertical or steeply inclined. From this point 



