38 NEW YORK STATE MUSEUM 



PALEOZOIC STRATA 

 Description of the Strata 



Three small areas of early Paleozoic (Upper Cambrian) strata 

 occur within the quadrangle. Two of these lie a little west and 

 north of High Street village near the middle northern border of 

 the quadrangle, and the other lies 2^ miles northwest of Hartman 

 in the southeastern part of the quadrangle. All these have been 

 discovered by the writer, the area just west of High Street about a 

 dozen years ago, and the other two during the summer of 1920. 



The largest area, north of High Street, shows by far the most 

 extensive exposures. One-eighth of a mile southwest of Number 

 Nine pond an area of about an acre shows good outcrops of well- 

 stratified light-gray sandstone with one or two horizons of bluish 

 gray dolomitic limestone each a few feet thick. The strike is north 

 50 degrees east, and the dip 10 degrees north. The thickness of 

 strata exposed is perhaps 40 feet. South of the outlet brook, be- 

 tween the pond and the road, several acres contain a number of 

 large exposures of light-gray, well-bedded sandstone with a little 

 interbedded bluish gray dolomitic limestone toward the east. The 

 general strike is about north 65 degrees east, and the dip 15 degrees 

 north. A number of good outcrops occur along the outlet stream 

 of the pond, these all being sandstone, though some of the layers 

 are porous showing that they were originally calcareous. These 

 outcrops in general strike north 30 degrees east, and dip 15 degrees 

 west. Near the northern corner of the area an outcrop of some- 

 what porous sandstone strikes nearly north-south and dips west. 

 In the northern one-half of the area outcrops are fairly well dis- 

 tributed for one-fourth of a mile across the strike with a dip of 

 about 15 degrees west. Barring the possibility of minor faulting, 

 this sandstone, with some interbedded dolomite, must be at least 340 

 feet thick with neither top nor bottom of the formation showing. 

 The middle of the area is strewn with thousands of more or less 

 angular small and large fragments of the sandstone, with a good 

 many associated fragments of dolomite toward the south. It is 

 very clear that this whole area represents a mass of sandstone, with 

 some dolomite, sharply downfaulted against the syenite of Number 

 Nine mountain. 



In the small area three-fourths of a mile west of High Street 

 there is so much drift that the writer could not be perfectly certain 

 of an actually exposed ledge. Near the northern end an actual 



