408 



Report of the State Geologist. 



the gneiss, pyroxene l>eing developed .as a contact mineral between the two. 

 Small knobs of granite also crop <>nt near the road (505) on the west side 

 of the Drowned Lands, and about one mile north of Pochuck mountain. 

 There is also a hill of gneiss just north of the cross-roads on the east side 

 of the road, and about one and one half miles west by south of Pine Island 

 station. A short distance northwest of this are several outcrops (504)~ 

 show ing the transition of the blue limestone into the white. Up the short, 

 steep slope on the west side of the road, is a blue, fine-grained, hard limestone 

 (504a), with a low western dip. 



The blue limestone, with contact minerals, also crops out in the road. 

 Not moie than six feet from it is a small mass of white limestone, with 

 graphite scales. Next to this is a dark strip of rock, made up of contact 

 minerals. In the field opposite these outcrops, and about 150 feet distant 

 (5<»4e) is a mass of blue limestone with cavities and calcite streaks. At 

 the north end of the same outcrop is white, coarsely crystalline limestone, 

 while the space between shows every gradation between the bine and the 

 white. A large outcrop of the white occurs on an adjoining knoll to the 

 north. Another outcrop of the blue and the w hite is in a corn-field about 

 one-third of a mile to the southeast (506). 



The prolongation of the white limestone belt so far south from Mounts 

 Adam and Eve, without the appearance at the surface of any large igneous 

 masses, suggests that the Adam and Eve area and the Pochuck mountain 

 area are probably connected, and may be portions of the same intrusion. 



Relations of the Limestones and Hudson River Slates. Two facts greatly 

 hinder a correct understanding of the relations of the limestones and the 

 associated Hudson river slates. The area underlaid by these formations in 

 Warwick township is a rich farming country, and outcrops are few, and, 

 again, the limestones in the main belt are often massive, and good strikes 

 and dips are not easily obtainable. On the western side of the Drowned 

 Lands, the limestone boundary extends from Unionville, northeast through 

 Gardinerville and, about two miles east of this place, swings around to the 

 northeast. Near Liberty Corners the blue limestone (502) strikes N. 70 c> W., 

 and has a dip of 15 L ' W. The layers are four to eight inches thick, w ith 

 shaly partings. Northeast of Gardinerville the limestone strikes N. 30° E. ; 

 dip, 30° N. W. It is somewhat cherty and variable in color. 



At Gardinerville, the slate is exposed under the dam in the bed of the 

 stream. The dip is w r est. Northeast of Orange farm (89) the limestone is 

 well exposed in a quarry on the west side of the main road from Goshen to 



