ELIZABETHTOWN AND PORT HENRY QUADRANGLES IO5 



Titanic acid was found in five of the six, but its amount is very 

 small. The ore is rich and, as shown by the analyses is of quite 

 remarkable uniformity. In 1907 a magnetic mill has been built 

 and concentration of the leaner unused ore has been undertaken 

 accompanied by a reduction of the phosphorus. 



Nos. 5 and 6. These two pits are called the Pilfershire. They 

 lie at the western foot of the ridge which intervenes between 

 Moriah Center and the lake. Not far above them is the Grenville 

 with its limestones^ and the relations are extraordinarily like those 

 at Cheever. Even the gabbro appears not far to the eastward as 

 detected by F. L. Nason, who has called the writer's attention to it. 



The southern pit is a small one and of no apparent importance. 

 The northern pits consist of three larger and two smaller openings. 

 They strike nearly north and south and dip 60° west, passing below 

 the highway 50 feet lower down. The wall rock is the familiar 

 green gneiss which in thin section shows plagioclase and pyroxene. 

 The mines are now abandoned and full of water. 



The close parallelism between the geological relations here dis- 

 played and those at the Cheever is worthy of emphasis. In both 

 the ore belt strikes nearly north and south and dips at about 60° 

 west. It is in the characteristic green gneiss of almost identical 

 mineralogy. Just above are the Grenville limestones. Just below 

 but after an interval of gneiss is the gabbro. Between the two 

 stands a ridge of old syenitic gneisses, with no Grenville involved 

 and extending 2 miles without a break. Undoubtedly faulted 

 upward, they make a mountain summit, 500 feet above the Pilfer- 

 shire and 1000 feet above the Cheever. 



Nos. 7 through 11. Mineville group. ^ A general outline of the 

 relations of the ore bodies at and near Mineville, may first be given. 

 There is one group of mines based on a large faulted and folded ore 

 body in the village of Mineville itself. It outcrops at about the 

 1200 and 1300 foot contours and is the basis of several distinct 

 mines, some of which are no longer worked. A half mile to the 

 northwest Barton hill rises to an altitude of 1880 feet and 011 its 

 eastern slope, and ranging from its 1300 contour to the 1750 is a 

 long diagonal outcrop with many pit's. The group, collectively 



1 In the preparation of these notes, every possible kindness has been 

 extended to the writer by Mr S. Norton, general manager of Witherbee, 

 Sherman & Co., Mr S. LeFevre, chief engineer, and Mr Rogers Hunt, 

 assistant engineer. Mr Guy C. Stoltz, engineer for the Port Henry Co., 

 has been equally courteous and helpful in affording data and advice 

 regarding the adjacent properties. 



