GEOLOGY OF THE POUGHKEEPSIE QUADRANGLE 8/ 



eastern cori'tact with the slates, about one-half mile south of Smith's 

 house, the quartzite shows a strike of n. 20° e. and a clip of about 

 60° e. A mile and a half to the southeast, on the farm of Eugene 

 Storm at Overlook, is a large block of compact whitish quartzite 

 identical in character with that just described. This is cut off by 

 a fault at the south against the slates. It can be traced only a short 

 distance northward and disappears beneath the drift. This mass 

 apparently belongs with the strip first described. 



This Cjuartzite is probably an interbedded member of the slate 

 formation. Its exact equivalent has not been noted elsewhere 

 ■within the quadrangle. 



illSCSLLAXEOUS FAL'LTED LIMESTOXES WITHIN THE HUDSON RIVER 



FORMATION 



Arthursburg. Three small patches of limestone are faulted in 

 with the slates at Arthursburg. One of these is near the Central 

 New England Railroad station. The impure shaly limestone is 

 exposed in the railroad cut and forms a conspicuous knoll, which is 

 situated partly on the railroad property and partly on the estate of 

 Obed Hewitt. It is bounded on all sides by the slates and is hardly 

 more than one-fourth of an acre in extent. It occurs along the north 

 ward projection of the line of faulting that farther south forms the 

 western boundary of the angular portion of the Fishkill limestone 

 nortii of Hopewell Junction. Its present position is due to this fault 

 and marks its northward continuation. A careful search showed 

 that the limestone does not occur in the neighborhood to the west of 

 this fault. 



A few hundred yards to the northeast of the station, on the road 

 ascending the hill toward Beekman, conglomeratic limestone, with 

 pebbles squeezed and elongated, outcrops along the road just north 

 of the old schoolhouse. 



One-fourth of a mile north of this outcrop on the farm of G. L. 

 Wiley, just southeast of the private cemetery, the limestone is 

 expo-ed on a knoll just north of the brook. Some bluish-gray beds, 

 like those seen at Rochdale, are present. The conglomeratic facies 

 is al.-sent. The beds strike n. 10° w. and dip 55° e. The knoll is 

 entirely surrounded by the slates. The topography suggests a fault 

 more or less parallel with the brook at this place. The fault just 

 referred to as projected north from the Fisytill limestone dies 

 awav to the northward. 



