Metallic Veins and Beds. 



521 



also, is very ingenious ; but my own mind is not satisfied with any 

 explanation that has yet been proposed. 



I am not aware that any facts which have come to my knowledge 

 relative to the metallic veins in Massachusetts, will throw any light 

 upon this subject. But as yet they have not, except in a few instances, 

 been penetrated far enough to develope facts of much interest. 



The direction of these veins is, however, a point that ought not to 

 be passed over in silence. For when we find veins corresponding in 

 direction, especially if in the same formation, we have good reason 

 for presuming that they originated in a common cause, and at the 

 same epoch. On Plate XVI, which shows the direction of the strata 

 in Massachusetts, I have given the course of most of the metallic 

 beds and veins in the State by double arrow heads. The follow- 

 ing are the data from which I made the delineation 



Direction. Dip. 



1. Bed of Iron in Hawley ; North and South ; Vertical. 



2. Do. Somerset, Vt. Do. 20 to 30 East. 



3. Bed of Manganese, Plainfield, 



(S. West part.) Do. nearly 9O East. 



4. Vein of Lead (most Southerly) 



Leverett, Do. nearly vertical. 



5. Do. Whately, (North part) Do. Do. 



6. Vein of Copper Ore on Island, 



Turner's Falls, Do. Westerly. 



7. Vein of Copper Ore in Green- 

 field, near Turner's Falls, Do, Vertical. 



8. Vein of Manganese, Con- 

 way ; N. E. and S. W. Do. 



9. Vein of Lead, and Copper, 

 Leverett, (most northerly vein,) Do. 



10. Do. Do. Southampton, Do. nearly. Do. 1 ? 



11. Do. Do. West Hampton, Do. Do.? 



12. Do. Zinc, chiefly, 



Northampton, Do. Do. 



13 and 14. Two veins chiefly in 



Whately,* Do. 



15. Bed of Copper.Ore, Granby.Ct. Do. 20" S. E. 



* On Mr. Nash's Authority. 

 66 



