XVI CONTENTS 



CH. 30. AOE DETERM7NATION IN SEDIMENTS BY NATURAL RaDIOACTTVITY 



by F. F. Koczy ..... 



1. Introduction ..... 



2. Theoretical considerations . 



3. Geochemical considerations . 



4. Practical methods of age determination 



C}\. 31 



5. 



Rate of sedimentation 



Cross-Correlation of Deep-8ea Sediment Cores and Deter 

 mination of Relative Rates of Sedimentation by Micro 

 paleontological Techniqi'es by D. B. Ericson 



1 . Introduction ...... 



2. Methods of correlation .... 



3. Time-equivalence of the faunal zones 



4. Some examples ...... 



S16 

 816 



817 

 821 



825 

 828 



832 

 832 

 832 

 835 

 836 



HISTORY 



CH. 32. The Origin of Life by Stanley L. Miller ..... 845 



1 . Early considerations of the problem ..... 845 



2. The primitive atmosphere ....... 847 



3. The synthesis of organic compounds ..... 853 



4. The origin of life 860 



5. Evolution of early organisms ...... 860 



6. Life on other planets ........ 862 



CH. 33. The Preserved Record: Paleontology of Pelagic Sediments 



by W. R. Riedel 866 



1. Introduction ......... 866 



2. Fossils of deep-ocean basins versus those of shallow waters . 866 



3. Objectives of deep-sea paleontology ..... 867 



4. Shelled pelagic micro-organisms and their distribution . . 868 



5. Interpretation of Quaternary microfossil assemblages . . 875 



6. Micropaleontological determination of ages .... 878 



7. Pre-Quaternary paleoceanograph}^ ..... 882 



CH. 34. The Pleistocene Record by C. Emilinni and R. F. Flint . . 888 



1. Introduction ......... 888 



2. Continental stratigraphy ....... 891) 



3. Marine stratigraphy . . . . . . . .901 



4. Summarv .......... 919 



Author Index 



929 



Subject Index 



945 



