U6 



INDEX. 



Conclusions respecting erosions, 122. 



Connecticut river, its basins, 11. 



Connecticut valley from the mouth of the river to 



Middletown : thence to Hadley : second basin 



from Holy ok e to Mettawarnpe, 11. 

 Connecticut river, third basin from Mettawarnpe 



to mouth of Miller's river, 12. 

 Connecticut river, fourth from Miller's river to 



Brattleborough, 12. 

 Connecticut river, Brattleborough to Westminster, 



12. 

 Connecticut river, sixth, Bellows Falls to North 



Charlestown, 12. 

 Connecticut river, seventh, Charlestown to As- 



cutney Mt., 12. 

 Connecticut river, eighth, to Fairlee, 12. 

 Connecticut river, ninth, Fairlee to Bath, 12. 

 Connecticut river, erosions in, 87. 

 Connecticut river, basins on its tributaries, 13. 

 Continent, regarded as slowly emerging from the 



waters, 56. 

 Countries alike in their surface geology of con- 

 temporaneous elevation, 66. 

 Cow's Mouth, a gorge in the Himalayas, 10*7- 

 Cox river, N. S. Wales, gorge on, 114. 

 Cuvier on tertiary strata, 1. 



D. 



Daggett, J. S., his account of surface geology in 



California, 107. 

 Dana, Prof. J. D., his description of valleys in the 



islands of the Pacific, 122. 

 Dana, Prof. J. D., his views of the drainage of 



continents, 66. 

 Darwin, Charles, on terraces, 1. 

 Darwin, Charles, his theory of delta terraces, 56. 

 Davis, C. H., on currents in the ocean, 4. 

 Dead Sea, terrace on its shore, 32. 

 De la Beche's theory of drift, 72. 

 Deerfield river, supposed marks of ancient glaciers 



along, 140. 

 Deerfield river, its basins, 13. 

 Deerfield river, terraces along, 27. 

 Deerfield basin, 18. 



Delphinus Vermontanus, its position, 65. 

 Delta and moraine terraces, 32. 

 Deltas and Dunes, localities, 45. 

 Delta terraces in Hinsdale, N. H., cut through, 21. 

 Denudation of the earth's surface, its great amount 



shown, 81. 

 Denudation, its amount in S. Wales and in Ohio, 



86. 

 Delaware river, gorge at the Water Gap, 111. 



Desor on western surface geology, 31. 



Desor on Osars, 4. 



Dixville Notch, N. Hampshire, 88. 



Dog river in Syria, gorge and natural bridge on, 

 118. 



D'Orbigny, his views of surface geology, '74. 



Dorset, valley of erosion in, 115. 



Drainage of the continent explains the facts of 

 surface geology, 55. 



Drainage of the continent, how effected, Prof. 

 Dana's theory, 66. 



Drift defined, 3. 



Drift, modified and unmodified, 2. 



Drift modified, defined, 4. 



Drift, relative position of, 8. 



Drift and terraces pass into each other, 8. 



Drift and alluvial agencies have had a parallel 

 operation, S2. 



Drift, not easy to separate modified from unmodi- 

 fied, 50. 



Drift, the two sorts often confounded, 64. 



Drift stria;, how low in valleys, 50. 



Drift and alluvium, varieties of the same forma- 

 tion, 73. 



Drift agencies still active, 64. 



Drift agencies described, 67. 



Drift, organic remains usually in the modified 

 only, 64. 



Drift action, how distinguished from that of rivers, 

 89. 



Drift action, from that of glaciers, 131. 



Drift, theories of its origin, 68. 



Drift, the glacier theory, 69, 71. 



Drift, the iceberg theory, 69, 70, 71. 



Drift, formed mostly while the continent was sink- 

 ing, 6S. 



Drift, Prof. Naumann's views of it, 67. 



Drift produced by glaciers, icebergs, slides, waves 



of translation, and ice floods, 73. 

 Drift period, how long since, chronologically, 127. 

 Duttonsville gulf, in Vermont, 102. 



Eau Noire, terraces along, 42. 

 Elephant's bones in N. Y. and Vt., 65. 

 England, surface geology of, 35. 

 Erosion of the earth's surface, 82. 

 Erosion, fluviatile, how deep, 9. 

 Erosion, its great amount, proofs, 81. 

 Erosion, agents of, 82. 

 Erosion by the ocean, 85, 86. 

 Erosion by drift, 88. 

 Erosion by rivers, 89, 91. 



