TACONIC SYSTEM. 
23 
have been caused by exudations of different kinds from the primary rock, which filled up the 
fissures near its surface, incorporating themselves with the sand, &c. deposited upon the 
surface; the whole of which, by the agency of crystallization, undergoing a change of character, 
giving rise also to a connection not easy to solve without much investigation. 
From the little to be seen of the Taconic system in the district, it might readily be con¬ 
sidered superfluous; but by directing attention to it in this prominent manner, a full investiga¬ 
tion will follow. Moreover it is a convenient receptacle for deposits which belong neither to 
the Primary or the New-York system; and the mind in England is disposed to one of the kind, 
since the Cambrian system holds the same position. From the necessity of a connecting link 
between the Primary and the Secondary classes, which alone existed when Werner rose as a 
geologist, we owe the Transition class, the fruits of which are, the Cambrian system of Mr. 
Sedgewick, the Silurian of Mr. Murchison, and the Devonian of Mr. Phillips ; now 
merged, with the exception probably of a portion of the Cambrian, in the New-York system. 
