132). zD. zDana—Geology of Vermont and Berkshire. 
Art. XIX.—On the relations of the tee | a Vermont to that 
of Berkshire; by JAMES D. D 
ES: from page 48.] 
izes the belt from north to south, and requires consideration : 
namel y— 
3. Tue ABUNDANT OccURRENCE OF IRON. 
The existence of iron in the rocks is known mainly from the 
beds of limonite along the region. This limonite, as is now well 
known, was made from the rocks in place, and hence it is testi- 
mony as to what the original rocks contained and still contain 
where unaltered. Its beds exist in Vermont at so many places 
that the geologists of the Vermont Survey represented it a 
their EEE map of the State as a continuous band of 
limonite. nd south of Vermont it occurs more or less in each 
of the towns over ace limestone area, and in some of them in 
a sits of great depth, the most noted being in Richmond 
and West Stockbridge, Massachusetts; Salisbury and Sharon, 
ca ie ee ie oe Copake, Ancram, North ge (ase 
Mille on), Amen a, Dover, and Pawling, in New Yor In 
jens that this fentaes of the region may be appreciated, T men- 
tion here the more prominent facts connected with the ore-beds. 
In a general way, and for special localities, the subject has been 
often treated. The descriptions given in this place have par- 
ticular reference to the regional characteristics of the beds 
the limestone belt, as illustrated by their mineral nature, dis- 
tribution, and stratigraphical relations; and they have been 
drawn mainly from my own observations. 
(1.) The mineral nature of the beds. 
= the great limestone area, from north to — 
the ore-beds are alike in the nature of the ore, its m 
apareation, and its association with yellow ochre sie anya 
Moreover, in most of the beds to the north as well as south 
more or less manganese is present with the iron. Manganese 
nington, Chittenden; Pittsford, Brandon, Middlebury, Bristol; 
and ihe Vermont Report rt adds, § ‘in the vicinity of most a i 
beds of limestone in the State.” I 
observ 
in various ore-beds of Berkshire and wee York, though oa 
