BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 

 Vol. 23, pp. 471-476 OCTOBER 12, 1912 



COVEY HILL REVISITED^ 



BY J. W. SPENCER 



{Presented before (he Society December 21 , 1911) 



CONTENTS 



Page 



Detailed features of Covey Hill Gulf 471 



Origin of Covey Hill (Julf 474 



The reputed marine beaoh of Covey Hill 475 



Detailed Features of Covey IItll Gulf 



This localiiy has l)oen regarded as a critical point in the study ol' 

 <>*la('ial (hxms. It has been most t'ldly des(!ribed by Prof. J. B. Wood- 

 worth.^ 



The summit of the hill is 1 mile north of the international boundary 

 line and some 20 miles west of Lake Champlain. It is a flattened ridge 

 3 or 4 miles long, rising on the floor of the northeastern angle of the Adi- 

 I'ondack plateau. The highest point is 1,118 feet above the sea. Imme- 

 diately southward is a flat depression, a mile in width, reduced in part 

 to an elevation of l,r)25 feet. Both noi'th and south of tlu* depression 

 steps of rock rise abruptly. The outlying C^ovey Hill is like eininenct^s 

 ob.servable on dissected tablelands, best seen outside of drift regions, 

 where the local drainage, descending both sides of spurs, produces de- 

 pressions which eventually dissect the plateaus into separated flats or 

 ridges. This was evidently the pre-Glac^ial history of Covey Hill. The 

 hill slopes rapidly northward, descending to plains 300 to 400 feet above 

 tide. 



^I'hc promontory is capped with Potsdam sandstone, covered by a thin 

 layer of drift, but this has been entirely swept off' the rock surface of 



' Mauuscript received by Ihe Seerelniy of the Society .Tanuary .'il. 191L'. 

 -Ancient water levels of the Champlain aiul Hudson valleys. Bull. .S4. N. V. State 

 Museum, 1905, pp. lHl-104, 17;M74. 



XXXIV — Bull. Geol. Soc. A.m., Vol. L'3, 1911 (471) 



