-Vo. IF. 



lyj. 



SKETCH 



Of the Mineralogy of the Town of Nexv-Haven^ 



2N ANSWER TO THE PIFTH QUESTION OF THE COMNECTICUT ACAD- 

 EMY OF ARTS AND SCIENCES. 



IT will be advantageous to consider this subject un- 

 der two divisions, which naturally arise out of the 

 diversity of surface by whicji the territory belonging to 

 the town of New-Haven is strongly marked. 



I. Of the plain country. 



II. Of the mountainous and hilly country. 



And I. Of the plain country. 



The city of New-Haven stands on the southern part 

 of an extensive plain, boinided on all sides, excepting 

 the south and south-west, by a circular range of eleva- 

 ted ground, rising, in most places, into high hills, and, 

 in two instances, into mountains of considerable altitude. 

 The mean diameter of this plain, which forms an irreg- 

 ular amphitheatre, has not been ascertained by correct 

 measurement, but it probably does not exceed two and 

 a half, or, at the most, three miles. Two rivulets wash 

 the boundaries of the plain, and the bottom of the hills; 

 the one on the east, and the other on the west, and ter- 

 minate in arms of the sea, or salt water creeks, flowing 



