88 NEW YORK STATE MUSEUM 



An unmistakable fault passes southeastward from Arthursburg 

 and intersects the strike fault that follows the line of the old Clove 

 branch railroad bed. 



The shaly beds near the station are probably younger than the 

 conglomerate, while the latter is probably younger than the mass 

 near the cemetery from which the conglomerate may have been 

 eroded. These small masses are all separated from each other by 

 the slates and no others could be found. They are clearly small 

 faulted inliers of the older rocks lying near or at the intersection 

 of two faults, one of which exactly parallels a similar break bound- 

 ing the Fishkill limestone just south, while the other is the north- 

 ward continuation of a fault between that limestone and the slate. 



The fault features which mark the Highlands and the Fishkill 

 limestone thus continue northward within the slate formation. 



Moores Mill. On the farm of Mr Skidmore, about one mile 

 west of Moores Mill station, is a larger mass of limestone resting 

 against the slates. It extends up the hill en the northwest side of 

 the road and for a short distance through the woods, but on the 

 west, north and east gives way to slates. On the southeast it 

 passes beneath the flood plain of Sprout creek. The entire patch 

 does not exceed an acre or so in extent. In the orchard west of 

 Skidmore's house the slate and limestone are mixed together. The 

 limestone is of a gray color and somewhat crystalline and seamy, 

 but has no distinctive character. No satisfactory readings could 

 be obtained. 



East of the creek, one-half mile from Skidmore's house, on the 

 farm of Mr Houghtalin, is a small, precipitous ledge of limestone 

 in place, apparently dipping to the east at a high angle. This ledge 

 is in the angle formed by the two roads northeast of Houghtalin's 

 house. The topography just south of the ledge is that of a scarp, 

 which continues for one-third of a mile southwest. The scarp slope 

 for this distance is uniformly abrupt, but outcrops are concealed 

 south of Houghtalin's. The topography suggests a transverse break 

 at the south along the line shown on the map. South of this break, 

 along the base of the slope, outcrops are concealed by surface 

 material for some distance, but farther on the slates outcrop in 

 low-lying ledges and in some places lie close to the base of the 

 slope. 



The discovery of these two limestone patches aroused the sus- 

 picion that the valley of Sprout creek might be in the limestone, 

 but careful search failed to show the limestone in any other out- 



