Geology, &c. of the Connecticut. , 59 
ford, and in the east part of Woodbridge. So far as I have 
examined these places, I have always founda valley of geest 
between the rocks. But this is often very narrow; as for ex- 
ample half a mile west of Branford meeting-house, where 
granitic ledges lie on one side of the road and a greenstone 
ridge on the other. Further examination of this and 
the other points mentioned above, might discover associa- 
tions similar to those occurring in the Hebrides. 
Origin of Greenstone. 
Does the greenstone of the Connecticut afford evidence 
in favour ofthe Wernerian or of the Huttonian theory of its 
origin? Averse as I feel to taking a side in this controversy, 
I cannot but say, that the man who maintains, in its length 
and breadth, the original hypothesis of Werner in regard to 
the aqueous deposition of trap, will find it for his interest, if 
he wishes to keep clear of doubts, not to follow the example 
of D’Aubuisson, by going forth to examine the greenstone 
of this region, lest, like that geologist, he should be compel- 
led, not only to abandon his theory, but to write a book 
against it. Indeed, when surveying particular portions of 
this rock. I have sometimes thought Bakewell did not much 
exaggerate when he said in regard to Werner’s hypothesis, 
that, “it is hardly possible for the human mind to invent a 
system more repugnant to existing facts.’ 
On the other hand, the Huttonian would doubtless have 
his heart gladdened, and his faith strengthened by a survey 
of the greater part of this rock. As he looked at the dikes 
in the old red sandstone, he would almost see the melted 
rock forcing its way through the fissures; and when he came 
to the amygdaloidal, especially to that variety which resem- 
bles lava, he might even be tempted to apply his thermom- 
eter to it, in the suspicion that it was not yet quite cool. And 
without doubt he would see many a volcanic crater on the 
top of these ranges, where, with our dull eyes, we see only 
a pond or a quagmire. Even the occurrence of this 
stone in beds in sandstone would present no obstacle, since 
the discoveries by Dr. Macculloch in the isle of Skye o 
similar beds, of whin stone; concerning which he says, 
“there are no instances but where the alternating beds of 
trap detach veins or dikes from the lower to the upper beds; 
