412 



Report of the State Geologist. 



Toward the base of tlie mountain they become more heavily bedded, and 

 are succeeded by shales. The conglomerate extends along the crest of the 

 mountain for several miles north of Greenwood lake, and forms bold cliffs and 

 Ledges at the top of the steep wooded slopes. It disappears southwest of 

 Long pond, where the mountain breaks up into rounded hills, and does not 

 reappear again, except at one point, until Skunnnemunk mountain is reached. 

 This one point is about three-quarters of a mile northwest of Round pond, 

 south of Monroe. 



The quartz-seamed sandstones come up on the other side of the synclinal, 

 on the northwest side of Bellvale mountain (366), where they are faulted 

 against the Pre-cambrian gneisses. The sandstones and conglomerate every- 

 where present abundant slickensided surfaces. 



About 800 feet of conglomerate are represented in the sections across 

 the mountain at the north end of Greenwood lake. 



The Bellvale flags are represented along Greenwood lake by grey flaggy 

 sandstones, often Cut by veins of milky quartz. About two miles north of 

 the state line, the Monroe shales appear as black slaty shales, resembling 

 somewhat the Hudson river slates, with which they were for a time 

 confounded. Hamilton fossils are not uncommon. They are abundant in 

 the slates along the road, where the latter follows a cliff above the lake, about 

 one-quarter mile north of the Lakeside hotel. 



The fossils are much distorted, but the following were recognizable : 



Trop idoleptus carinatus. 



Spirifer mucronat us. 



LiorhyncTius, sp. 



Rhynckonella, sp. 



The Esopus slate, though very abundant farther down the lake, does 

 not appear north of the state line. 



The synclinal fold of Bellvale mountain is often so compressed that the 

 dips are eighty or ninety degrees."' The Monroe shales are exposed along 

 the west side of Long pond, two and one-half miles south of Monroe, and 

 about 500 feet north of the school-house. They here contained a number of 

 impressions closely resembling Spirophi/toii. 



North of Greenwood lake, on a small knoll (4:2(5), is an outcrop of 

 quartzite with sand grains and occasional pebbles. It dips to the westward 

 under the Bellvale flags. Darton has considered it to be Oriskany, and 

 while it is very probably this, proof is lacking. 



* Some of these apparent dipfl may be cleavage planes. 



