416 



Report of the State (xeologist 



feet thick, as previously noted by Smock, and later corroborated by Darton. 

 It passes into the underlying Bell vale flags, the intermediate beds being a 

 grey quartzitic sandstone; the transition beds are, however, of less thickness 

 than in Bell vale mountain. The lower beds of the conglomerate are to be 

 seen behind the Seven Springs Mountain house, where they are interbedded 

 with grey laminated sandstones. 



The Bell vale flags extend the entire length of the mountain, cropping out 

 at numerous points on both slopes. They are thin-bedded, flaggy sandstones, 

 which, in their lower members, have numerous shaly and concretionary layers. 



Aside from the outcrops on both sides of the mountain, the sandstones 

 are exposed along the road leading from the main road west of Skunnemunk, 

 up to the Seven Springs Mountain house (236). About one-quarter mile west 

 of the Mountain house are the Davidson quarries at the cross-roads. Several 

 openings have here been made, and a poor quality of flagging obtained. 

 Some plant-remains occur in the quarry, northeast of the cross-road, and shaly 

 layers appear in the southern lower part of the quarry face. The quarry is 

 about 750 feet A. T. Professor Prosser records the finding of the following 

 specimens of plants: Psilophyton princeps, Catamites, and aerial rootlets (?) 

 of the latter. 



A short distance to the northeast of Davidson's quarry, is Davidson's 

 coal-mine. This point is about one and one-half miles north of Monroe. 

 The greyish flagstones of the quarry contain an abundance of carbonaceous 

 matter, which led the inhabitants to believe that there was coal present. 

 Remains of Psilophyton are numerous in the quarry. The species thus far 

 recorded from here are, as already observed : Psilophyton prmceps, Lepido- 

 dend/ron ga*pi<ininn, Catamites tranxitionis and, according to Newberry, 

 Dddo.rijloih ; Dawson, however, thinks the last to be Catamite* radiatus. 



About one and one-half miles northwest of Monroe, on the southwest 

 base of the mountain, and 300 feet lower than the Davidson quarries, are 

 several small quarries on the land of O. H. Cooley. The rock is a thin- 

 bedded sandstone, with shaly layers, which have been polished to a high 

 degree by shearing. Concretions occur in the shaly layers and also in the 

 coarse sandstone ledge to the northeast of Cooley's largest opening. The 

 shales contain abundant remains of plants, commonest among which is 

 Psilophyton. Several of the others were submitted to Prof. Knowlton, but 

 they were too fragmentary for identification. Prosser notes the finding of 

 Celluloxyton primcBVUin ) as identified by Knowlton. The specimen found 

 by Prosser represented the <'nd of a stem protruding from the sandstones of 



