Geology,^ ^c. of the Connecticut. 

 I. Inferior Order. 



25 



1. Gra 

 nite.^ 



fCommon 

 Porphyritic j Mica Slate 

 Graphic ^ Serpentine 

 Limestone, 



Pseudo- 

 morphous 



Rocks observed in contact ivith 

 those in the leading column. 

 f Sienitic Granite "] N. Hampton,Belchert'n,&c. 

 I Gneiss | Leverett granitic range, 



I Hornblende Slate | Do. Granville, &c. 



I Conway, Williamsburghj&c. 



Y W estfield, Mass. 



2. Sienite, or Sien- 

 itic Granite/ 



rCom- 



_ • I x^onway 



Diluvium } Passim 



Alluvium J Northampton 



Granite ~1 Northampton, &c 



j Hornblende Slate ] Chatham. 



\ Primitive Greenstone ^Whately. 



I Diluvium I Do. 



(Alluvium J NorthamptoD. 



[Granite ^ Leverett, &c. 



Hornblende Slate I Passim 



„^ . J men J White Gran. Limestone (^Litchfield County. 

 J.Oneiss.-J Qij^^ju.-j ]viica Slate [ Leverett, Granvi 



(_^ lous 



4. Hornblende 

 Slate 



Steatite | New-Salem. 



Diluvium J Passim 



'Granite "] Granville, Sic. 



Sienitic Granite | Chatham. 



ille, 



[&c. 



Gneiss 

 I Mica Slate 

 I Diluvium 

 rGranite 



Gneiss 



Hornblende Slate 



5. Mica Slate 



}- Passim 



( Shelburne, Colerain, &c. 

 J Passim. 



"I Conway, &c. 



Mouson, VVilbraham, &c. 



Shelburne, Heath, &c. 



Limestone, (No. 7) | Deerfield, Conway, &c. 



Argillite 

 Chlorite Slate 

 ■i Greenstone Slate 

 Serpentine 

 Steatite 



Old Red Sandstone 

 Coal Formation 

 Diluvium 



Leyden, Woodbridge, (fee. 

 I Whitingham, Milford 

 fWhately, Do. 



Middlefield. 

 New-Fane, &c. 

 Passim. 



S. Hampton Lead Mine. 

 Passim. 

 J Wilbraham. 



6. Talcous Slate 



Alluvium 



Mica Slate > Plainfield, Hawley, fee, 

 ^^ Chlorite Slate ) Whitingham. 

 Limestone, or a Granitic C Granite (in veins) ) Conway. 

 Aggregate of Silex, Carb. ^ Mica Slate > Deerfield, &p. 



Lime and Mica ( Argillite ) Putney. 



* This is undoubtedly ihe rock denominated sienitic granite, by Dr. Mc 

 Culloch, in his Geology ol'Glen Tilt. (Geol. Trans. Vol' 3. p. 299 and 300.) 

 That is, he regards it as a mere variety of granite, distinguished from olher 

 varieties by the presence of hornblende in any proportion. Had I read his 

 memoir on the Tilt before the geological part of this sketch was written, I 

 should not have separated sienite from granite, but have treated the two 

 rocks as mere varieties. 



Vol. VII No. 1. 4 



