{Annals N. Y. Acad. Sciences, Vol. XXII, pp 259-266. 15 October, 1912] 



NOTES ON THE STRUCTURE AND GLACIATION OF 

 OVERLOOK MOUNTAIN 



By Neil E. Stevens 1 



(Read by title before the Academy 6 May,, 1912) 



CONTENTS 



Page 



Introduction 259 



Structure 260 



Olaciation 262 



Moraines 263 



Drainage 264 



Echo Lake 266 



Introduction 



Overlook Mountain is the southern terminus of the great central 

 mountain chain which forms the backbone of the whole Catskill system. 

 On the east, the mountain rises precipitously above the low ground of 

 the Hudson Valley, the land at the base of the steep incline on this side 

 being only about six hundred feet above sea level. This commanding 

 position gave Overlook for many years the reputation of being the high- 

 est peak in the Catskills, although it is actually more than a thousand 

 feet lower than Slide Mountain (Slide Mt. 4204 ft.; Overlook Mt. 3150 

 ft.). The position of Overlook in the Catskill system makes it of par- 

 ticular interest; and the present paper, though it by no means contains 

 a complete account of the geology of the mountain, is offered in the hope 

 that the notes contained therein may be of service to future investigators 

 and may, perhaps, stimulate an interest in the geology of this region. 

 The writer wishes to acknowledge his indebtedness to Professor H. E. 

 Gregory of Yale University for generous criticism and suggestions. 



The summit of the mountain (Fig. 1) forms a triangle, from the 

 apexes of which project three main ridges with smaller ridges between. 

 The principal ridge stretches southwest for a distance of about four 

 miles and ends in a series of three lower peaks, separated from the main 

 peak by the Meads gap. The southern ridge is short and slopes rather 

 sharply to the level ground of the valley. The northeastern ridge, on 

 the other hand, is short and high, merging into the Plattekill Mountain 



1 Introduced by James P. Kemp. 



(259) 



