Geology, $c. of the Connecticut. 27 
other singular and curious aggregates which I have never 
ace. Among these is sienitic porphy- 
ry—and sometimes the talco-micaceous rock has its surface 
covered with delicate fascicular groups of hornblende. 
he micaceous iron ore occurs in the talcose slate, and I 
have never seen any of this sort of ore in any cabinet that 
will compare at all for beauty with that in Hawley. 
6. Cutorite State. Cleaveland. 
Uncolored, but dotted with black. 
In the region under description, know of but two deposits 
of this rock of sufficient extent to be marked on the map; viz. 
at West-Haven and Milford* and in Whitingham, Vt. At 
the former on it is but imperfectly characterised, espe- 
cially -at its - ots extremity. As we approach the 
coast, in West- n, its characters become more decided, 
end’ hele we find et erous ae crystals of octahedral 
magnetic iron ore disseminated through it. Where the 
cliffs of this slate have long been buffeted by the waves of 
the ocean, these crystals have een worn out, and are de- 
posited in large quantities, in the form of iron sand, on the 
beach. On the east side of West-Haven harbour, at the 
Light House, also, this sand appears in equal abundance— 
and tons of it may easily be collected. On that side of the 
harbour there is no chlorite slate; and whether the iron 
* sand found there is the remnant of former chloritic strata 
now wholly aaa kets or whether it is washed up from 
the bottom e Sound, where these rocks doubtless exist, 
remains Bidileditical The latter supposition, however, 
seems most probable. 
The chlorite slate of West-Haven is extremely tortuous 
and undulating, and is traversed by numerous irregular seams 
of white quartz. It alternates with greenstone slate and 
passes into it; and also with mica slate, These three rocks 
are often so blended together that the distinctive characters 
of each are lost. And as we approach the strata of the 
Verd Antique, they seem to embrace also some of the prop- 
*West-Haven and a part of Milford wiki recently been incorporated in- 
to a separate town by the name of Oxford 
