.pi NEW YORK STATE MUSEUM 



The quartzite was found exposed well up the slope in the bed of this 

 brook dipping 50° to the northwest with a strike of n. 49° e. 

 following closely the strike of the ridge. For a mile and a half to 

 the northeastward this formation forms a clear topographic feature, 

 though concealed by drift. Farther on it outcrops frequently and 

 in large ledges along the south side of the road from the East Hook 

 to Shenandoah. It crosses the road less than one-fourth of a mile 

 west of that hamlet and is succeeded by the gneisses. There are 

 numerous outcrops of the quartzite just north of Shenandoah. It 

 is probably cut off at the east by the fault that borders the mountain 

 on the east. 



The quartzite is absent along the eastern base of Shenandoah 

 mountain until one reaches the mass associated with the basic 

 eruptive at Hortontown (see page 39). 



Along the northwestern slope of the eastern gneiss mass the 

 topography from the schoolhouse near Hortontown to Fowler's 

 kaolin mine suggests the presence of this formation. The quartzite 

 was not found and the lower portion of the slope is covered with 

 drift which contains frequent large quartzite boulders. The kaolin 

 rock at Fowler's mine may represent the quartzite. It seems likely 

 that the gneiss rests against the limestone southeast of Shenandoah, 

 and that the quartzite has since been eroded. South of the junction 

 of the Hortontown and Mountain roads, gneiss is the outcropping 

 rock in the valley of the brook as far as Hortontown. 



Along the slope of the eastern mountain mass, northeast of the 

 kaolin beds and the ore deposits, everything is beneath the drift for 

 a long distance at the base of the mountain. The gentle slope which 

 is present is probably due to talus. No outcrops of the quartzite 

 were found. South and southeast of Charles E. Bailey's the lime- 

 stone is only a short distance from the precipitous gneiss. Just 

 north of the road at the base of the mountain scarp, east of Bailey's, 

 a wide swamp extends northeastward. Three-fourths of a mile east 

 of the point where this road turns southward into the mountains 

 the quartzite was found in good-sized ledges within the edge of the 

 woods. 



The conditions along this slope resemble those described for Bald 

 hill. There was a tendency for the quartzite to fold somewhat 

 before the rupture occurred, and the slope of the hill marks the 

 slope of the quartzite as seen southeast of Shenandoah. Toward 

 the northeast the rupture occurred earlier, so that the gneiss now 

 stands in precipitous ledges against the limestone. Farther on, east 



