Kemp — GrEOLoay of Essex Coitnty. 



585 



of timber. Clay is found one mile and a half above Ausable Forks, on the 

 East Branch, in a thick bed just west of the road. East and south of Hay- 

 stack mountain, along' the highway, are extended deposits of sand that remind 

 one much more of the seashore than of the mountains. Now that the contour 

 maps are available, these deserve careful study as illustrating the glacial and 

 post-glacial history of the region. 



Glacial striae are not lacking and are marked in several places on the 

 map by large arrows. The pilot charts of lake Champlain give the magnetic 

 meridian as 11° 45' W. of the true north. The striae have been corrected 

 for this by making the true strike 12° east of the recorded magnetic. Near 

 the Forks the)' run nearly east and west (N. 92° E.). At Lower Jay they 

 are N. 52° E., and again two miles east, N. 52 c ' E. Southeast of Upper Jay, 

 at N<>. 56, they are N. 12° E. The frequency of boulders of Potsdam sand- 

 stone well up in the mountains and south of the outcrops of this formation 

 leads one to infer that there was movement from north to south even against 

 the present slope. All around the mountains these boulders have often 

 attracted observation in elevated and interior positions. 



Concluding remarks. Much further detailed study is needed along the 

 Jay-Chesterfield line in the stretch of mountains forming this wild and 

 uninhabited strip. The writer appreciates that the delimitations of the for- 

 mations given in the map are based on scattered observations, which future 

 study may more or less modify, but as a general expression of the results of 

 a reconnaissance, they are presented because they throw some light on a little 

 known region. 



Wilmington. 



Topography. The topography of Wilmington is closely parallel to that 

 of Jay. A broad valley at the northern boundary with a general altitude of 

 800 to 1,000 feet above the sea, narrows toward the south or rather southwest 

 to a mere gulch. Where, as in Jay, we have the East Branch of the Ausable 

 river, in Wilmington we have the West Branch, a very similar though some- 

 what smaller stream. In the eastern central portion there is also a marked 

 side valley along a small tributary which, however, is closely parallel in 

 direction with the main stream. The mountains that separate Wilmington on 

 the east from Jay, viz., Clark, Hamlin, Bassett and Ebenezer have already 

 been referred to under Jay. Between each pair there is a cross valley and 

 road. The whole southern part of the town is occupied by the rugged and 



