l8 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Evidence of a flood from the melting of tlie glacier. Origin of the 

 stratified estuary deposits of the New Haven plain; absence of marine 

 life from these deposits. Discovery of reindeer bones in the clay of 

 the Quinnipiac valley, between New Haven and North Haven. Dis- 

 cussion of the depression of the land and amount of subsequent ele- 

 vation, through evidence furnished by terraces, estuary deposits, etc., 

 in the river valleys of southern New England, especially in the New 

 Haven region; the Connecticut valley before the glacial flood, when it 

 overflowed its course in several places (in Connecticut, at Meriden). 

 Damming of streams by drift ice during the melting of the great 

 glacier. Discharge of the flooded Mill river into the Quinnipiac, and 

 the effect, as registered in the drift deposits of the New Haven plain. 



42. Dana, J. D. 



On the damming of the streams by drift ice during the 

 melting of the great glacier. 



Am. Jour. Sci., (3) xi, 178-180, 1876. 



Discussion of former ice dams at the narrows of several Connecti- 

 cut rivers; evidenced by terraces. The Thames, Connecticut, Housa- 

 tonic, Westfield, Farmington rivers are considered. 



43. Dana, J. D. 



On the relations of the geology of Vermont to that of 

 Berkshire. 



Am. Jour. Sci., (3) xiv, 37-48, 132-140, 202-207, 257-264, 

 1877. 



The geology of the limestone region of the Green mountains (in- 

 cluding northwestern Connecticut) ; stratigraphical relations of the lime- 

 stones, quartzite, and schists, and the abundant occurrence of iron. Con- 

 clusions as to the chronological, lithological, and orographic relations of 

 the formations. 



44. Dana, J. D. 



On " indurated bitumen " in cavities in the trap of the 

 Connecticut Valley. From the report on the geology of 

 Connecticut, by Dr. J. G. Percival. 



Am. Jour. Sci., (3) xvi, 130-132, 1878. 



Brief discussion of the origin of the " indurated bitumen " described 

 by Percival as occurring in the amygdaloidal trap at Farmington, New 

 Britain, Southbury, Rocky Hill, and Hartford; "bitumen" was dis- 

 tilled from the bituminous shales and limestones of the Triassic. (See 

 Russell, 250.) 



45. Dana, J. D. 



On some points in lithology. 



Am. Jour. Sci., (3) xvi, 335-343, 431-440, 1878; Can. Nat., 

 (new ser.) ix, 40-48, 80-91, 1878. 



Consideration and criticism of the value of some of the distinctive 

 characters which are generally accepted at the present time, in defining 

 certain kinds of rocks: i. "Older" and "younger"; 2. Foliated or 

 not; 3. Porphyritic structure; 4. Containing quartz or not; 5. 

 Containing " plagioclase "; 6. Rocks consisting of a triclinia feldspar 

 and mica; 7. Hornblendic or augitic; 8. Massive or schistose; 9. 



