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GEOLOGY OF THE SECOND DISTRICT 



lively unimportant. At one locality, however, it forms a good building stone. I refer tc 

 some quarries which have been opened within a short distance of Westport. Though it might 

 not pclish very perfectly, still it is sufficiently fine for the linings and backings of grates, fire- 

 places, etc. At all places where it occurs in Essex, it passes into the chazy limestone, which 

 it resembles in more respects than one. 



View of a fracture and Uplift if the Chazy Limatvnc at Essex. 



CiiAZY Limestone. 



Commencing my description of this rock as it exists in Essex county, and at the most 

 southern point at which it appears, I shall first remark, that I must speak with some doubt of 

 its existence at Crown-Point, unless at the extreme of Long point, as it is usually called, or 

 at the old fortress, celebrated in the early history of this country. In order to speak with 

 certainty on this subject, I should be obliged to make another examination of the spot. The 

 limestone at this place is black, and possesses some of the characters of the calciferous sand- 

 rock, together with one or two fossils which are of a doubtful character : a strophomena 

 occurs Iierc, which has a resemblance to one in the Mohawk vallejs in the upper part of the 

 calciferous sandrock. Still I am disposed to consider this dark colored rock as the chazy 

 limestone ; and it is highly probable that a thin portion of the trcnton may also be found here, 

 the birdscyc being wanting. 



