l6 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuM. 



29. Dana, J. D. 



On the geology of the New Haven rearion, with especial 

 reference to the origin of its topograpiiic features. 

 Am. Jour. Sci., (2) xlix, 275, 1870. 

 Topographic features produced by glaciers rather than by irebergs. 



30. Dana, J. D. 



Excursion to Hanging Hills of Meriden. 



History of Wallingford, by C. H. S. Davis, 53-56, 1870. 



The scenery and geological features of the Meriden region are 

 described. The Quinnipiac and the Connecticut rivers owe their 

 altered courses to the eruption of trap; the smaller streams were affected 

 by post-Tertiary elevation. Between Berlin and Wallingford are 

 eight fractures from which liquid rock issued. Only a small amount of 

 rock has been worn by glaciers from the summits of the Hanging Hills. 



31. Dana, J. D. 



On the Quaternary, or post-Tertiary, of the New Ha- 

 ven region. 



Am. Jour. Sci., (3) i, 1-5, 125, 126, 1871. 



The drift of the New Haven region was the result of glacier rather 

 than iceberg action; the Connecticut valley glacier was but the inferior 

 portion of the great continental glacier. 



32. Dana, J. D. 



[Review of] " Historical notes of the earthquakes of 

 New England, 1638-1869," by W. T. Brigham. 

 Am. Jour. Sci., (3) i, 304, 305, 1871. 



227 earthquakes recorded since 1638. Dana calls attention to the 

 fact that volcanoes and earthquakes are not necessarily related. 



33. Dana, J. D. 



On the Connecticut river valley glacier, and other ex- 

 amples of the glacier movement along the valleys of New 

 England. 



Am. Jour. Sci., (3) ii, 233-243, 1871. 



Great valley depressions, as the Connecticut valley, influenced the 

 direction of the flow of the continental glacier; in such valleys the ice 

 movement was in the general direction of the valley. 



34. Dana, J. D. 



Triassic sandstone of the Palisade ranges. 



Am. Jour. Sci., (3) ii, 459, 460, 1871. 



The Connecticut sandstone contains orthoclase, and the New Jersey 

 sandstones contain albite. 



35. Dana, J. D. 



Green mountain geology. On the quartzite. 



Am. Jour. Sci., (3) iii, 179-186, 250-256, 1872. 



Description of the quartzite of Canaan, Connecticut, Poughquag, 

 New York, etc., and its general relation to the Green mountain 

 quartzite, the crystalline limestone, and metamorphic schist; at Canaan 

 the quartzite unconformably underlies the limestone. 



