REPORT OF THE DIRECTOR, 1922 II 
iron ores in the Orange county and nearby regions, even though this 
field was the earliest to be opened in the history of iron mining in 
the State and in which production has proceeded discontinuously 
from colonial days. A resurvey which was begun a year ago by 
R. J. Colony, has been brought to a successful conclusion and has 
succeeded in determining quantities and indicating procedures which 
can not fail to be helpful to the iron-producing industry. This report 
is now on the press. | 
The Schunnemunk region. There is perhaps no part of the 
State where dislocation, upheaval and breaking down of the rock 
beds is so extreme as in the region of the Schunnemunk hills west 
of the Hudson river, south of Newburgh and east of Goshen. Dur- 
ing the past season Mr Colony has made a special study of this region 
for the purpose of elucidating its greatly involved geological 
structure. 
The Newburgh quadrangle. The survey of this region which 
lies directly north of the Schunnemunk quadrangle, was begun two 
years ago and has been completed, with the preparation of a geolog- 
ical map. The work has been skilfully done by F. Holzwasser, 
under the direct supervision of Charles P. Berkey. 
Geological map of the Capital District. The capital district 
comprises the Schenectady, Cohoes, Albany and Troy quadrangles. 
This large central district affords a comprehensive view of the New 
York geological formations ranging from Lower Cambrian in the 
eastern hills to Middle Devonian in the Helderberg section of the 
Albany sheet. Some of its tectonic problems are difficult, for the 
reason that the eastern part is intensely folded and overthrust and 
the western part practically undisturbed, the transitional zone pass- 
ing through the middle of the capitol district and there forming a 
belt of complex stratigraphic and tectonic relations which it is hoped 
to solve by this survey now in charge of Doctor Ruedemann. 
Adirondack geology. The survey of this difficult field and the 
resolution of its complicated problems have proceeded now without 
interruption for 30 years. Because of the involved character of its 
structure the work of mapping the area on the scale of one mile to 
the inch and with intimate examination of regions difficult of access 
must move slowly. The Adirondack region, expressed in terms of 
the territory north of the latitude of the Mohawk river is covered 
by ninety-one topographic quadrangles, seven of which are still 
unsurveyed. Thirty-nine of these quadrangles have now been geo- 
logically mapped and expounded. During the past year the area of 
