252 NEW YORK STATE MUSEUM 



though not yet utilized to any extent, is found in the southern part 

 of St Lawrence county in the towns of Fine and Pitcaim along the 

 line of the Carthage and Adirondack Railroad. There are many 

 available quarry sites along the railroad. On the west the granite 

 is bordered by a dark close-textured syenite not adapted for building 

 purposes, but suited for crushed stone and engineering work requiring 

 a strong material. 



In the eastern Adirondacks the available quarry materials suitable 

 for architectural and monumental work consist of granite, syenite 

 and anorthosite. These formations are of widespread occurrence 

 although it is rarely that they possess the qualities requisite for 

 crushed stone as they have been largely metamorphosed into 

 gneisses. One of the localities where massive phases of these rocks 

 are obtainable is in the vicinity of Ausable Forks. For several 

 years past a considerable amount of montmiental stone has been 

 shipped from this section principally consisting of green syenite. 

 Quarry sites are found along both sides of the Ausable river above 

 and below the village of Ausable Forks. The monumental syenite 

 has a bright green color on polished surfaces, takes a lustrous polish 

 and brings out in strong relief the finest tracery. It is an excep- 

 tionally strong and durable stone, but some qualities show a tendency 

 to bleach or turn yellow on long exposure. The product from this 

 locality has been marketed under the names of Adirondack green 

 granite and Killamey green granite. Anorthosite outcrops to the 

 south of the village along the east branch of the Ausable. It con- 

 sists of a fine ground mass of feldspar of greyish color set off by 

 inclusions of black pyroxene and hornblende lending the appearance 

 of a medium gre}^ granite. The stone is well adapted for building 

 purposes. Other quarries of anorthosite are foimd in the vicinity 

 of Keeseville and south of there near Augur lake. A considerable 

 quantity of stone was once taken from the Keeseville quarries of 

 which examples are to be seen in Keeseville itself and in one or two 

 of the public buildings in New York City. The Empire State 

 Granite Company has been engaged in recent years in the develop- 

 ment of quarries southeast of Keeseville where is found a light 

 green variety of the stone which is very attractive both in rock 

 finish and polished work. The exposures here and also on the 

 shores of Augur lake take the form of great ledges in which the rock 

 is broken at regular intervals by joints so that it can be readily 

 quarried. The stone possesses a wsll marked rift and grain similar 

 to that of ordinary granite which facilitates its cutting. In the 

 vicinity of Dannemora, Clinton county, a pink or grey granite of 



