394 NEW YOXK STATE MUSEUM 



which dip about 5° eastward and, owing to the well-defined 

 joints and the evenness of the bedding, blocks are worked out 

 readily which are suitable for cutting into curbing and flagging 

 stone, or for making paving blocks. Its color is gray- white — 

 in places striped, red and white. It is hard, and is nearly all 

 silica. Unlike the quarries at Potsdam there is little earth cover- 

 ing, and the beds worked are not deep. 



The output of the Hammond quarries is nearly all consumed 

 in street work, and goes to Utica, Syracuse, Rome, Binghamton, 

 Ogdensburg and to western cities. 



Clayton, Jefferson County. — The Potsdam sandstone forma- 

 tion crops out at Clayton, and affords a hard and durable stone 

 for local demands. 



Hudson River Group. 



Highland, Ulster County. — Quarries on the river bank, two 

 miles north of Highland station, were formerly worked exten- 

 sively. 



Rhinebeck, Dutchess County. — The New York Central and 

 Hudson River Railroad Company continues work at its quarry, a 

 half mile south of the station. 



New Baltimore, Greene County. — The sandstone is here on 

 edge, and is generally in thick beds, interstratified with a black, 

 shaly rock. The quarries are not worked to the same extent as 

 in former years. The stone is dark-gray to slate colored. Much 

 stone has been obtained here for the Hudson river dyking and 

 for dock-filling. 



Troy, Rensselaer County. — Sandstone is quarried on Pawl- 

 ing avenue, near the Memorial Church, and on Fourth street, 

 near and south of the Poestenkill. It is used for foundations 

 and common wall work in the city, exclusively. The quarries 

 are in operation at such times as the demand for stone requires. 



Aqueduct, Schenectady County. — Three quarries have been 

 opened at this point. The stone is gray to blue in color and fine- 

 grained. It is known in the market as " Schenectady bluestone," 

 and is used in common wall work in Albany, Cohoes and Troy. 



Stone with natural-face (joint) surfaces and even-bedded is 

 broken into rectangular blocks and is used in ashlar work. Some 



