272 



Scientific Geology. 



Tiverton Bridge, R. I. (Slate,) 



Little Compton, (Slate,) 



Fall River, (Troy,) Slate and 

 Quartz Rock, 



Swansey, (Conglomerate,) 



West Bridgwater, (Slate,) 



North Bridgwater, 



Canton 



Milton, .... ^ r 



Newton north part, 



Cambridge, . . . ?. ,. 



Watertown, . . ; ... .', 



Dorchester, (Conglomerate,) . 



Roxbury, (do.) . 



Natick, (Slate,) 



Newbury, (Slate and Conglom- 

 erate,) 



Milton, (Argillaceous Slate,) 



South Boston, do. 



Nahant, do. 



Hull, do. 



Rainsford Islands, do. 



Charlestown, do. (near the In- 

 sane Hospital,) 

 do. (in a quarry,) 

 do. (Winter Hill,) 

 do. (Near the 

 Powder House,) 



do. 



do.* 



do.* 



Direction. 

 N. and South. 

 N.E. and S.W. 



Dip. 



45 West. 



East and West. 



do. 



do. 



do. 



do. 

 N.E. and S.W. 



W. a little N. 

 North and South. 

 East and West. 



45 N. 

 North, large. 

 50 to 60 N. 

 30 to 40 N. 

 60 to 70 N. 

 Nearly 90 S.E. 



50 S. E. 



10 W. 



15 to 20 N. 



E. and W. nearly. 15 N.N.E. 



The predominant direction of the strata in this formation may be 

 seen on the annexed map, (Plate XVI.) which shows the general 

 direction of all the strata in the State. Local exceptions, unless of 

 great extent, cannot of course be shown on a map of such limited 

 size. These exceptions are so numerous in the preceding table, 

 that one might be disposed to question whether any parallelism in 

 the direction, or uniformity of dip, can be made out. But extensive 

 examination will satisfy any one of the truth of the general state- 



* Professor Webster : see Boston Journal of Philosophy, &c. Vol. 1. p. 280, et 

 seq. 



