in the Counties of New-Haven and Litchfield. 233 
sompletely covered with a stratum of trap, which by some 
subsequent operation, was carved, united to its subjacent 
masses, into the present surface of the country, so as to be 
detached in some places, and to remain contiguous in oth- 
ers. Is there any reason (independent of the theory of 
universal formations, which I think must not be taken 
nce was continuous over a much larger extent of coun- 
29) 
My present impression is that the trap of Connecticut 
and Massachusetts, has not extended over more country 
than it now occupies. But this subject may at a future time 
be resumed. rebut 
In Southbury, numerous low, conical hills, of sand and 
gravel appeared, and formed the basis of the road. 
Recurrence of primitive country,—and ride to New-Haven. 
spot. : 
The rocks which intervene between this place and New- 
Haven, are the same ranges which, a few miles North, I pass~ 
in the commencement of this tour. They are, for two 
or three miles mica slate—then chlorite slate, much mixed 
Slate and clay’slate, which succeed, lie vast isolated masses 
of trap, without any apparent connexion with other rocks ; 
m t f 
ge naa or trap, and perhaps give some countenance te 
Mr. Steinhauer’s suggestion. 
