THE 



CANADIAN RECORD 



OF SCIENCE. 

 vol. iv. january, 1891. no. 5. 



Clay Concretions of the Connecticut River. 



By Miss J. M. Arms. 



The concretions with which I am most familiar are found 

 between Brattleboro, Vt., and Sunderland, Mass., a distance 

 of about thirty miles. Between the two towns named, few 

 clay beds occur on the right bank, it being either green 

 with vegetation, sandy or rocky, but on the left shore the 

 beds are numerous. 



Vou are first attracted by the deep blue color of the clay, 

 which can be seen a distance from the shore. In some 

 places, as between the two ferries known as Bice's and 

 Whitemore's, this clay occurs interstratified with sand; in 

 others, as at Sunderland bridge, it forms projecting shelves 

 into the stream which are often thickly strewn with con- 

 cretions washed from the beds above. 



Again, as at the mouth of Saw Mill River, a little stream 

 that empties into the Connecticut, the clay forms a high 

 cliff rising perpendicularly from the water's edge. It is 

 one of the finest exposures to be seen. Stratification planes 

 cut it horizontally, and joint planes obliquely, while the 

 peculiar blue color presents a striking contrast to the green 

 vegetation above, and the sparkling waters below. I have 



1 Abstract of a paper on " Concretions of the Connecticut River," now in course 

 of preparation. 



