Geology, &c. of the Connecticut. 3 
granite of Norway and Scotland. Its texture varies from 
the coarsest to the finest grain, and it exists here in most of 
the forms that have been noticed. 
East-Haven Granite. 
The deposit of granite marked in East-Haven and Bran- 
ford, has its ther ee extremity at the Lighthouse, 
which stands on a sea beaten rock of this description. The 
grain is intermediate “tania fine and coarse, and the fels- 
pa ris usually reddish. In passing from East-Haven to 
ranford, we find the granite immediately succeeding the 
old red. sind stone, or the slate rocks of the coal formation, 
or the greenstone ; and all these rocks are nearly on the 
same level. Their actual contact with the epee» howev- 
er, has not been 1 observed, 2 being hid by 
"here is no evide ence that this granite Caeiitutes a bed 
ou Id seem, ga it oH 
gneiss ag mica date, wah snbedt: a few miles to ‘Whe 
north, and which there lie at a much higher level. On 
passing east and northeast from this granite deposit, well 
marked beds of this rock appear; and perhaps all the gran- 
ite which is found at the mouth of Connecticut river occurs 
in this form. 
do not know exactly how far the East-Haven granite 
may be traced along the coast. Certainly the gneiss reach- 
es the sound before we come to Connecticut river 
In the cavities of this granite, when it is washed b y the 
tide, one or two species of Lepas and other testacea, have 
fixed their abodes, finding security in those projecting crags 
which are so appalling and dangerous to the mariner. Some 
Ulvae and Fuci, also, are found along the shore. 
South Hampton Granite. 
Although the granite thus designated extends but a little 
distance into South Hampton; yet it contains the South 
Hampton lead mine, which will, no doubt, be long an in- 
creasingly interesting focus to which mineralogists will be 
