FLEXUEES IX NEW JERSEY. 389 



in the core of the range, and by the erosion of the eastern limb of the 

 anticlinal they have been bared of the Green Pond rocks over an enclosed 

 area about a mile in length. The gneisses extend along the base of the 

 mountain, and finally attain an elevation of 200 feet in its face, with 

 cliffs of conglomerate above. The relations are shown near the center 

 of section IX, plate 17. A mile and a half south of Newfoundland the 

 pitch changes to southward, and the conglomerate in the eastern limb of 

 the anticlinal gradually extends up the sloj^e, and finally covers the 

 crj^stalline rocks. To the southward the pitch increases, the flexure 

 narrows, the ridge rapidly decreases in elevation and width and the 

 Green Pond beds sink beneath the overlying formations. The flexure 

 soon dies out in the area of Monroe shales southward. This spur of 

 Green Pond mountain is separated from the main mountain by a narrow 

 valley in a synclinal which is not of great extent. 



Green Pond mountain rises on an anticlinal which begins under the 

 lowlands just east of Newfoundland. The Longwood red shales are 

 brought up in great force a mile south of Newfoundland, and then the 

 Green Pond rocks, which rise rapidly into a high, rough ridge, present- 

 ing a steep rocky front to the east and a long slope to the west. The 

 crystalline rocks soon come out along the eastern face of this ridge, con- 

 stituting steep, rocky slopes, surmounted by a precipice of the conglom- 

 erate. The crystalline rocks gradually attain the crest of the anticlinal 

 southward, and the pitch diminishing in amount, they continue in this 

 l)Osition for a long distance, with ridges of conglomerate on either side. 

 Green pond lies along this eroded arch, and along its western side is 

 bordered by high cliffs of the Green Pond conglomerate. The outlet of 

 the pond is to the south and it has cut a deep, narrow gorge in the crys- 

 talline rocks along the arch of the anticlinal. In Copperas mountain 

 east of the lake, and southward to the end of this mountain, the Green 

 Pond beds lie in a synclinal perched high on the crystalline rocks. North 

 of the pond this synclinal pitches down, and finally occupies the valley 

 lying between the northern end of Green Pond mountain and Copperas 

 mountain. This pitch carries the Green Pond rocks across the low divide 

 just north of the pond, and the synclinal valley contains Helderberg 

 limestones over a considerable area south of Newfoundland, Oriskany 

 quartzite at Newfoundland, and Monroe shales northward to beyond 

 Postville, where the flexure dies out. 



The northern end of Copperas mountain and Kanouse mountain its 

 northern continuation, are monoclines of Green Pond rocks dipping 

 westward beneath Longwood reW shales, Helderberg hmestones, Oriskany 

 quartzite, and massive shales of the synchnal valley just described. 



