THE MINING AND QUARRY INDUSTRY I913 93 



product, there is some flagstone sold, mainly by the quarries at 

 Burke, for shipment to Montreal. 



The so-called Hudson river group is essentially a group of sand- 

 stones, shales, slates and conglomerates, ranging in age from the 

 Trenton to the Lorraine, but which have not been sufficiently 

 studied to permit the actual elimination of the various members on 

 the map. The group is exposed in a wide belt along the Hudson 

 from Glens Falls southward into Orange county and also in the 

 Mohawk valley as far west as Rome. The sandstone beds are 

 usually fine grained, of grayish color and rather thinly bedded. 

 Over wide stretches they provide practically the only resource in 

 constructional stone and consequently they have been quarried at a 

 great number of places to supply the local needs for building and 

 foundation work. Some of the stone is crushed for road metal 

 and concrete. 



The Medina sandstone is found along the southern shore of 

 Lake Ontario from the Niagara river east to Oswego county ; in 

 central New York it is represented by a coarse conglomeratic 

 phase called the Oneida conglomerate. As developed in the west- 

 ern part of the State, where it is principally quarried, it is a hard 

 fine-grained sandstone of white, pink and variegated color. The 

 pink variety is specially quarried for building stone and has an ex- 

 cellent reputation. Many of the larger cities of the country and 

 most of the important towns and cities of the State contain ex- 

 amples of its architectural use. The large quarries are situated in 

 Orleans county, near Albion, Holley and Medina, along the line 

 of the Erie canal, but there are others at Lockport and Lewiston, 

 in Niagara county and at Brockport and Rochester in Monroe 

 county. The Medina sandstone also finds extensive applications 

 for curbing and flagging and for paving blocks. It is employed 

 more extensively for the latter pvtrpose than any other stone quar- 

 ried in the State. 



The Shawangunk conglomerate is more widely known for its 

 use in millstones than for constructional purposes. It outcrops 

 along Shawangunk mountain in Ulster county and southwesterly 

 into New Jersey, with an outlier near Cornwall, Orange county. 

 The quarries near Otisville have supplied considerable quantities 

 of stone for abutments and rough masonry. 



The Clinton sandstone is mainly developed in central New York, 

 being absent from the Clinton belt in the western part of the State. 

 It forms ledges of considerable extent on the south side of the 



