186 GEOLOGY, &C. OF A 



mont. I think that the Transition, docs not inter- 

 pose between the Primitive and Secondary forma- 

 tions in this vicinity ; or, if it does, but partially so. 

 The hills in the vicinity of Lakes George and Cham- 

 plain, extend in a line nearly north and south ; they 

 consist of detached masses, the tops of which are either 

 rounded, or extend nearly in a horizontal line of 

 greater or less extent $ their sides are generally very 

 abrupt ; their height varies from five to fifteen hun- 

 dred feet above the level of the adjacent lakes. 



At Essex in New- York, the hills of Lake Cham- 

 plain, retire from its western shore, about six miles ; 

 their usual height at this place, is about eight hun- 

 dred feet. Nine miles north-west of Essex, in the 

 town of Willsborough is a detached mountain mass, 

 which extends from east to west : on its northern 

 face, near its base, is a bed of Garnet-resinite, in pri- 

 mitive Trap : the bed is from six to ten feet in 

 width ; it extends from South-east, to North-west, 

 and dips towards the North-east, making an angle 

 of inclination with the horizon, of about thirty-five 

 degrees. The Garnet resinite is accompauied by 

 Tabular Spar, common massive, and granular Gar- 

 net, and Pyroxene. This locality was first visited 

 in 1810, by Doct. William Meade ; by whose direc- 

 tions 1 was enabled to fiud it. The Garnet resinite 

 is also found imbedded in primitive Trap, at Char- 

 lotte, in Vermont, eight miles east of Essex. 



Three miles south of the upper falls of Lake 

 George, is an abrupt acclivity, the eastern face of 

 which, presents a surface composed apparently of 



