l66 NOTES 



Chapter III: Continental Terraces and Submarine Valleys 



1. R. J. Russell, Bulletin Geological Society of America, LI (1940), 11 99. 



2. C. Abbe, Jr., Proceedings Boston Society of Natural History, XXVI (1895), 

 489. 



3. M. Ewing, A. P. Crary, and H. M. Rutherford, Bulletin Geological Society of 

 America, XL VIII (1937), 755 ft*. 



4. E. C. Bullard and T. F. Gaskell, Nature, Vol. CXLII, Nov. 19, 1938. 



5. A. C. Veatch and P. A. Smith, Bulletin Geological Society of America, Special 

 Paper No. y, 1939. 



6. F. P. Shepard and C. N. Beard, Geographical Review, XXVIII (1938), 439. 



7. H. C. Stetson, Transactions of the American Geophysical Union, 16th Meeting, 

 1935, Part I, p. 226; 17th Meeting, 1936, Part I, p. 223; Bulletin Geological Society 

 of America, XLVII (1936), 339. 



8. F. A. Forel, Bulletin societe Vaudoise des sciences naturelles, XXIII (1887), 18; 

 Le Leman (3 vols. Lausanne, 1892-1904), I, 65, 385. 



9. F. P. Shepard, Proceedings National Academy of Sciences, XXII (1936), 496. 



10. D. W. Johnson, The Origin of Submarine Canyons, New York, 1939. 



11. W. H. Bucher, Bulletin Geological Society of America, LI (1940), 489. 



12. See R. A. Daly, American Journal of Science, XXXI (1936), 401. 



13. F. A. Forel, Comptes Rendus Academie Francaise, October 19, 1885. 

 Contrast of temperature alone can produce a density current in water that is clean 



or is uniformly charged with suspended silt. A striking example is described in the 

 recent (mimeographed) Report on Density Currents Investigations by the United 

 States Bureau of Reclamation. See the section of Lake Mead (at Boulder Dam) in 

 Figure 88 of the Report. The figure represents a case where a current of relatively 

 cool and therefore contracted water of the Colorado River entered the lake in 

 January, 1939. This current, with average thickness of about 100 feet (one third of 

 the average depth of the lake along the section), was found: (1) to keep its indi- 

 viduality for the no-mile traverse of the lake; (2) to plunge toward the bottom of 

 the lake; and (3) to flow, for the week taken to make the journey, at the rate of 

 about 2100 feet or 0.4 mile per hour. Here the excess of density above that of the 

 adjacent lake water was only 0.0003 (that of pure water at 4 C. being 1.0), and the 

 dope on which the current moved was only about 1 in 860 or 0. 001 16. 



14. J. Romieux, Les carbonates dans les sediments du Lac de Geneve (These, 

 Universite de Geneve), 1930. 



15. Report presented at Annual Meeting of the Division of Geology and Geog- 

 raphy, Nadonal Research Council, April 27, 1940. 



16. Compare N. C. Grover and C. S. Howard, Proceedings American Society of 

 Civil Engineers, April, 1937. 



17. H. M. Eakin, Technical Bulletin No. 524, U. S. Department of Agriculture, 

 Soil Conservation Service, 1936. 



18. P. H. Kuenen, Leidsche Geologische Mededeelingen, Deel VIII, Aflevering 

 2 > I 937> P- 3 2 7> Tijdschrift van het Koninl{lij\ Nederlandsche Aardrij\s\undig 

 Genootschap, Deel LV, Aflevering 6, Leiden, 1938; Geological Magazine, LXXV 

 (1938), 241. 



19. F. P. Shepard, Bulletin Geological Society of America, XLV (1934), 292. 



20. See H. C. Stetson and J. F. Smith, American Journal of Science, XXXV 

 (1938), 12. 



