MAGNETITE IRON DEPOSITS OF SOUTHEASTERN NEW YORK 4I 
BART 2 
THE MAGNETITE DEPOSITS 
In this section the distribution of the magnetite bodies is briefly 
discussed; they have been divided into groups which fall into more 
or less well-defined belts whose extent and location are given. 
The geologic relations of the ores and the associated rocks are 
described and an attempt has been made to explain the complex 
nature of that portion of the Precambrian crystallines to which the 
magnetite seems most intimately related. The structural features of 
the ore bodies are described, including a discussion of the forms 
of the ore bodies, and deformation. The character of the magnetite 
is considered, and a conception of the processes involved in the 
formation of the ores is set forth. 
DISTRIBUTION 
With a few exceptions the magnetite deposits of southeastern 
New York are confined to definite belts and zones which are parallel 
to the general trend of the rock-structure. The broadest belt, in 
Orange county, forms part of a much larger ore-zone extending into 
New Jersey on the south and northeastwardly to the Hudson river. 
Within this broad zone are subsidiary belts along which numerous 
old pits, open cuts and shafts may be found. Considerable ore has 
been taken from these old workings in the past. 
In Putnam county, east of the Hudson river, the magnetite deposits 
fall into three belts; one, the Phillips “vein,” beginning just north 
of the Cold Spring (or Carmel) road 7 miles east of Cold Spring, 
extends southeastwardly along Canopus creek through Dennytown 
as far as Travis Corners, a distance of about 7 miles. Another and 
smaller belt begins about 114 miles west of Oscawana Corners in 
Sprout Brook valley, extending for about 3 miles southwestwardly 
along Sprout brook, and into Westchester county. 
A third belt, beginning in the city of Brewster, may be traced south- 
westwardly for almost 5 miles, passing through Croton Falls, in 
Westchester county, and ending about three-fourths of a mile south- 
west of that village. 
In addition to these belts there are random occurrences of 
magnetite both in Orange and in Putnam counties which appear to 
have no special relation to the belts or zones of magnetite just 
mentioned, and which seem to be isolated deposits. 
