14 NEW YORK STATE MUSEUM 



Macomb Graphite Company — Popes Mills Graphite Company, 

 iy 2 miles southwest of Pope's Mills, St Lawrence county. 



A deposit on the Indian River, 3 miles from Rossie, St Lawrence 

 county. 



Of the complete list, twenty-four of these properties were per- 

 sonally visited during the field season of 1917. The salient features 

 of each will be discussed in the following pages. 



THE GRAPHITE DEPOSITS OF THE NORTHERN AREA 



While an attempt is made to avoid technical terms, certain 

 concepts are necessary for a comprehensive grasp of the conditions 

 found in the northern area. 



Two general groups of rocks are involved : the first, a great 

 series of sedimentary rocks originally bedded limestones, sand- 

 stones and shales that have been altered by earth forces to crystal- 

 line limestones, schists and gneisses. The second group comprises 

 igneous rocks, among which granite is especially prominent. Igneous 

 rocks are later in age and have invaded the sedimentary series 

 from below. Where the hot fluid mass, saturated with various 

 gases, came in contact with the sediments, especially if they were 

 limestones, and the proper conditions obtained, graphite was 

 developed by complex chemical and physical reactions within the 

 zone of contact. The deposits of the northern area have, in large 

 part, been formed by the process thus briefly outlined. The 

 general subject of origin of the graphite deposits is treated fully on 

 page 141. 



The Buck Mountain Pond Property 



Located in the township of Ticonderoga, Essex county, within 

 the limits of the Ticonderoga topographic map of the United 

 States Geological Survey, between Buck mountain and Keeney 

 mountain, 1 near the shore of Buck Mountain pond. 



The history of the various companies which have attempted to 

 develop this deposit is extremely complicated but apparently the 

 company which operated at one time was known as the Consolidated 

 Graphite Company and at another the Amalgamated Graphite 

 Company. 2 



The extent of the property is said to be a tract of 84 acres 3 on the 



1 The local name of the latter is different from that given on the map. 



2 The Amalgamated Company included the Rowland Graphite Company- 

 near Johnsburg. 



3 Information supplied by Mr Charles T. Rowland of the Rowland Graphite 

 Company. 



