272 Scientific Geology. 





Direction. 



Dip. 



Tiverton Bridge, R. I. (Slate,) 



N. and South. 



45° West. 



Little Compton, (Slate,) 



N.E. and S.W. 





Fall River, (Troy,) Slate and 







Quartz Rock, 



E. and West. 



45° North. 



Swansey, (Conglomerate,) 



East and West. 



35 to 40° N. 



West Bridgwater, (Slate,) 



do. 



30° North. 



North Bridgwater, 



do. 



Northerly. 



Canton, .... 



do. 



25 to 50° N. 



Milton, 



do. (nearly,) 



60 to 70° N. 



Newton — north part, 



do. 



30° North. 



Cambridge, . . . 



do. 



60 to 70° N. 



Watertown, 



N.E. and S.W. 



90°. 



Dorchester, (Conglomerate,) . 



S.E. and N.W. 



15 to 30° N.E. 



Roxbury, (do.) . 



do. 



do. 



Natick, (Slate,) 



N.E. and S.W. 



45° N.W. 



Newbury, (Slate and Conglom- 







erate,) 



East and West. 



45° N. 



Milton, (Argillaceous Slate,) 



do. 



North, large. 



South Boston, do. 



do. 



50 to 60° N. 



Nahant, do. 



do. 



30 to 40° N. 



Hull, do. 



do. 



60 to 70° N. 



Rainsford Islands, do. 



N.E. and S.W. 



Nearly 90° S.E. 



Charlestown, do. (near the In- 







sane Hospital,) 



W. a little N. 



50° S. E. 



do. do. (in a quarry,) 



North and South. 



10° w. 



do.* do. (Winter Hill,) 



East and West. 



15 to 20° N. 



do. # do. (Near the 







Powder House,) 



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. 



