INDEX 



Actinium-lead decay series, 32, 33 

 Actualism, 7-10, 12, 14, 18, 19, 42, 



65, 66 

 Actualisme, 7 

 Aerobic, 47, 62 

 Age of the earth, 41 

 Aktualismus, 7 

 Albedo, 123 

 Albian, 40 

 Algae, 70, 75-77, 79, 82, 84, 85, 



91, 114 

 Algonkian, 71 

 Alps, 8, 11, 13 

 Amino-acids. 49, 52, 53. 60 

 Amphibia. 127, 128 

 Anaerobic. 47, 48, 59, 62, 63, 125 

 Andes, 13 

 Appalachians, 8, 1 1 

 Aradiatic, 63 

 Archaeic, 71 

 Argentine, 100, 102 

 Assimilation, organic -, 59-61, 63, 



134 

 Atmosphere, actualistic -, 62-65, 



70. 82. 91, 133 

 Atmosphere, anoxygenic -, 48. 49, 



60. 62-64. 89. 92. 96. 97, 106. 



109-111. 113. 114. 128. 134. 135 

 Atmosphere, oxygenic -, 47, 58, 



60-65, 70, 88, 89, 95. 97, 100, 



111, 113, 114, 130, 134, 135 



Atmosphere, pre-actualistic -. 62- 

 66. 70. 88, 91, 92, 113, 133 



Atmosphere, primeval -, 48, 49, 

 51, 58, 60. 62-65. 96, 124, 134, 

 135 



Atmosphere, reducing -, 94, 96, 97 



Atomic number. 31. 32 



Atomic symbol, 31, 32 



Atomic weight, 31-34 



Augite, 95, 97 



Azoic, 71 



Bacteria, 59. 105, 111, 125, 127 



Bajocian, 40 



Barghoorn, E. S. and Tyler, S. A., 



6, 87 

 Basement, 72, 73, 112 

 Bay of Balae, 16 

 Bernal, J. D., 127 

 Bijvoet, J. M., 116 

 Billion, 6 



Biogenesis, 127-129 

 Bioherm. 11, 91 

 Biotite, 95 

 Birds. 127, 128 

 BMnd River, Ontario, 70, 89, 99, 



104. 109. 133 

 Botnian, 97 

 Bulawayo, Southern Rhodesia, 



77-83 



