•226 



Geology, &fc. of the Connecticut. 



1. Lamellar Hornblende. Good specimens are found in 

 Holland Mass. (Eaton.) Also in Leverelt, Sunderland, Con- 

 way, &;c. of a black colour, in Shutesbuiy it is green. 

 It is found in sienitic granite and gneiss, in scales that are 

 easily mistaken for black mica. 



2. Fibrous Hornblende. At Leyden, the fibres very fine. 

 Also near Bellows Falls, extreme ly beautiful, associated with 

 quartz. Also in Shelburne, Conway, Goshen, he. in mica 

 slate, in large and broad fibres or lamellae. 



3. Fasciculifc. This is composed of fibres, or rather in many 

 instances, of lamellae, frequently more than y^ of an inch 

 broad, diverging at both ends, so as to occupy u>^ually, as many 

 as 60° of a circle. These lamellae are commonly inserted 

 perpendicularly to the folia of the slate in which they occur, 

 and are applied to each other by their broader faces, being 

 bent outwards on both sides somewhat like a bow, and pre- . 

 senting elegant and very perfect fascicles, Tne fibres or 

 lamellae, scarely, if ever, cross one another; ycit some- 

 times they diverge in nearly straight lines, and sometimes 

 are so much curved as to resemble very exactly a sheaf 

 of grain when standing erect (See Plate 9,) The figure in 

 the plate does not give a representation more regular or dis- 

 tinct than many of the most perfect specimens present. The 

 length of the fibres or lamellae varies from one to four inch- 

 es. It is found i mica slate and talco-micaceous slate in 

 Hawley, Plainfield, and Conway. Probably this variety is 

 comprehended under Fibrous Hornblende by Cleaveland ; 

 and perhaps specimens as perfect as those described above 

 are not unfrequent. But so exact and striking an instance 

 do these exhibit of the fascicular structure of minerals, that 

 I could not resist the temptation to denominate them Fasci- 

 cidite. 



4. Hornblende Slate. For an account of this, see the Geo- 

 logical part of this sketch. 



53. ActynoUte. At Saybrook, and near N. Haven in ser- 

 pentine. (Silliman.) Also at Litchfield. (Brace.) Also at 

 Middlefield. (Dewey.) Also at Hawley. (Eaton.) Also at 

 Cummington. (J.Porter.) Also at Windham in compressed 



