40 trask. PRINCIPLES OF SEDIMENTATION [Ch. 1 



Trask, P. D. (1932). Origin and environment of source sediments of petroleum: 



Gulf Publishing Co., Houston, Texas, 323 pages. 

 (1937). Relation of salinity to the calcium carbonate content of marine 



sediments: U. S. Geol. Survey, Prof. Paper 186-N, pp. 273-299. 



(editor) (1939). Recent marine sediments: American Association of Pe- 



troleum Geologists, Tulsa, Okla., 736 pages. 

 Twenhofel, W. H. (editor) (1932). Treatise on sedimentation: Williams and 



Wilkins Co., Baltimore, Md., 2nd ed., 926 pages. 

 Twenhofel, W. H. (1937). Terminology of the fine-grained mechanical sedi- 

 ments: Report, Committee on Sedimentation, 1936-1937 (National Research 



Council), pp. 81-104. 

 (1939). Principles of sedimentation: McGraw-Hill Book Co., New York, 



610 pages. 

 Udden, J. A. (1914). Mechanical composition of clastic sediments: Bull. Geol. 



Soc. Amer., vol. 25, pp. 655-744. 

 Vaughan, T. W. (1910). A contribution to the geologic history of the Floridian 



plateau: Carnegie Inst. Washington, Pub. 133, pp. 99-185. 

 Wadell, H. (1935). Volume, shape, and roundness of quartz pebbles: Jour. 



Geol, vol. 43, pp. 250-280. 

 Waksman, S. A. (1936). Humus: Williams and Wilkins Co., Baltimore, Md., 494 



pages. 

 Walther, J. (1894). Einleitung in die Geologie als histoi~ische Wissenschaft; 



Lithogenesis der Gegenwart: G. Fischer, Jena, pp. 535-1055. 

 Wattenberg, H. (1933). Kalziumkarbonat und Kohlensauregehalt des Meeres- 



wassers: Wiss. Ergeb. Meteor Exped., Bd. 8, Tl. 2, pp. 1-333. 

 Welch, P. S. (1935). Limnology: McGraw-Hill Book Co., New York, 535 pages. 

 Weller, J. M. (1930). Cyclical sedimentation of the Pennsylvanian period and 



its significance: Jour. Geol., vol. 38, pp. 97-135. 

 Wentworth, C. K. (1935). The terminology of coarse sediments: Natl. Research 



Council Bull. 98, pp. 225-246 (Report, Committee on Sedimentation 1932-1931+) . 

 , and Williams, H. (1932). The classification and terminology of pyro- 



clastic rocks: Natl. Research Council, Bull. 89, pp. 19-53 (Report, Committee 



on Sedimentation 1930-1932). 

 Woodford, A. O. (1925). San Onofre breccia, its nature and origin: Bull. Univ. 



Calif. Publ. Dept. Geol. Sci., vol. 15, pp. 159-280. 

 Zobell, C. E. (1946). Marine microbiology: Chronica Botanica Co., Waltham, 



Mass., 240 pages. 



