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VoL. VI, PP. 23-34, PLS. 1-3 MARCH 17, 1894 
THE 
NATIONAL GEOGRAPHIC MAGAZINE 
SHAWANGUNK MOUNTAIN* 
BY 
N. H. DARTON 
UNITED STATES GEOLOGICAL SURVEY 
Shawangunk yf mountain is a prominent range lying between 
Hudson river and the southern Catskills, in Ulster county, New 
York. To the eastward it rises from the Wallkill valley in steep 
inclines, surmounted by a high escarpment; to the westward it 
slopes to the Rondout valley. Along its axis it rises gradually 
south of Rosendale, and finally attains an elevation of 2,200 feet 
and a width of five miles. It continues to the southward, with 
somewhat decreased height and width, through New Jersey and 
Pennsylvania, where it is known as Kittatinny mountain, and 
gives rise to the Delaware, Lehigh and Susquehanna water-gaps. 
The well known summer resorts of lake Mohonk and lake 
Minnewaska are on the summit of Shawangunk mountain, in 
Ulster county, so that the region has become familiar to a large 
number of visitors. Unfortunately, however, no description of 
its geology has ever been published and the meagre references 
in the report of Mather} throw but little light on the subject. 
During the autumns of the past two years I have had occasion 
to spend a few days on the mountain to determine the salient 
* Published by permission of Professor James Hall, State Geologist, in 
advance of the Annual Report of the Geological Survey of New York. 
+ Pronounced ‘‘Shongum,”’ according to the residents of the region. 
t Geology of New York, Report on the First Geological District, 1845, 
4—Nar. Geog, Maa., von, VI, 1894. (23 
