12 NEW YORK STATE MUSEUM 



On the hillside north of the road, from Calahan pond southeast 

 for i mile, there are many fine exposures of crystalline limestone 

 with some closely involved pyroxene and hornblende gneisses 

 toward the north. Toward the south this limestone contains yellow 

 quartz and graphite. 



That portion of the area near the map edge from Calahan pond 

 northward shows a number of fine exposures of crystalline lime- 

 stone mostly containing graphite associated with some pyroxene 

 and hornblende gneisses, and exhibiting local foldings or contor- 

 tions. Just north of the small gabbro stock at the map edge the 

 Grenville consists of hornblende, hornblende-garnet and pyroxene 

 gneisses, and some quartzite. 



A very fine outcrop of Grenville was observed a few rods west 

 of the quadrangle boundary on the southern side of the small 

 gabbro stock I mile southwest of Sherman pond, the ledge being 

 clearly visible from the road. In a section fully 100 feet thick 

 pyroxene gneiss and biotite gneiss and quartzite are beautifully 

 stratified in thin beds. In the lower half of the section a dike 

 of granite several feet thick has been intruded, both the dike and 

 its foliation being perfectly parallel to the stratification of the 

 Grenville. 



Most of the ridge i mile east of Calahan pond appears to be 

 quartzite with hornblende and pyroxene gneisses and some lime- 

 stone at its eastern base, and hornblende gneiss at its western base, 

 but the outcrops are not very good. On and near the road i mile 

 a little north of east of Minerva there are several ledges of rather 

 coarse graphitic limestone associated with some thin-bedded, gray, 

 rusty graphitic gneiss and quartzite. 



Exposures showing contorted limestone with pyroxene and horn- 

 blende gneisses occur three-fifths of a mile west of the mouth of 

 Kelso brook. 



The hill i mile west of Irishtown consists of hornblende and 

 biotite gneisses on the south side of the small gabbro stock, and 

 quartzite underlain by some limestone on the north side. 



On the slope northwest of the hill just mentioned, several expos- 

 ures of well-bedded hornblende-garnet gneiss, and one of lime- 

 stone, were observed. From Falls brook northward the Grenville 

 nearly all appears to be typical hornblende-garnet gneiss in good 

 exposures. Limestone shows in a small exposure on the trail one- 

 half of a mile northwest of Irishtown. 



