A
Acadian Mountains 137,
138m
Acadian orogeny 137
Acanthostega 144, 277g
Acasta gneiss,Canada 41
acoels 51
acritarchs 59, 71
Adelaide, South Australia 59
Afar Triangle 244
Africa
Barberton Mountain land
39
Cape Mountains 102
Kaapvaal 42
Karroo Series 121, 152
Mauritanide Mountains 168
Swaziland sequence 39
Transvaal 27
agnathans 87, 88
Alaska
Alexander Terrane 98
Brooks Range 98
Chickaloon Formation 240
Chulitna district 33
Kandik Basin 100
Seward Peninsula 44
albedo 152, 277g
Alexander Island,Antarctica
221Alexander Terrane, Alaska
98
algae 25–29, 51, 55, 71, 89,
92, 105, 107, 191
algal mats 92
algal mounds 106
alligators 163, 227
allosaurs 209
alpine glacier 277g, 261
Alpine orogeny 251
Alps 63, 100, 193, 251
Amazon basin 227
amber 115, 181, 277g
amino acids 19
ammonia 14Index
Boldfacepage numbers indicate extensive treatment of a topic.Italicpage numbers indicate
illustrations or captions.Page numbers followed by mindicate maps;tindicate tables;gindicate
glossary.