Mount Toba Volcano,
Indonesia 261
multituberculates 180
Murchison meteorite 18
N
nautiloids 130, 218, 219,
284g
nautilus 131, 220
Neandertals 260
Nebraska
Kilgore 28
Neogene 284g
neuropteris 148
neutron star 3
Nevada
Antler Peak 120
Roberts Mountain Thrust
120
Nevadan orogeny 212
New Red Sandstone 192–193
New York
Taconic Range 102
New Mexico
Pierce Canyon redbeds 192
Niagara River Falls 266
Ninety East Ridge 242
nitrogen 14
nitrogen fixation 93
North America
assembly of 64
cratons 64m
growth of 99
location during Ordovician
101m
North American tektite 133
North Atlantic 195
North Carolina
Appalachian Mountains
168
Blue Ridge Mountains 160
North Pole, Australia 26, 27
Norway
Varanger Fjord 58
notochord 79, 87O
Ocala Formation, Florida
216
ocean 14–17
circulation 170t
currents 170
evaporation 19
Ohio River Falls, Kentucky
129
Red Sandstone 137–141,
139m
Oman
Wadi Jizi 40
Ontong Java 226
Oort cloud 6, 285g
Opabinia 81
ophiolites 39, 43, 100, 285g
opossums 239
orbital motions 94
Ordovician 85–103
ice age of 93–95
life-forms of 88–93
marine fauna of 86
North America location
during 101m
ore body 285g
ornithischians 184
orogens 43, 102, 285g
ostracods 130, 90, 77
Ottoia 81
Ouachita Mountains 155
outgassing 285g
oviraptor 198 , 204
oxygen 14, 35
ozone layer 14, 114, 232,
285gP
pachycostasaurs 163
Pacific Basin 211
volcanism of 226
Pacific plate 210
paleomagnetism 94, 285g
Paleozoic era 285g
landforms of 175
Palouse Falls,Washington
245
Panama Isthmus 253, 267
Pangaea 118, 154m,154–158,
165, 167, 190, 195, 182,
209–214, 285g
breakup of 99, 178
climate of 157
evolution of life on 156
extinction on 157
formation of 169, 174
rifting of 220, 235
panthalassa 120, 154, 210,
285g
paradoxides 70
paralititan 206
parameciums 32
Paratethys Sea 255
pegmatite 39
Peking man 259
pelycosaurs 165
penguins 200
Pensacola Mountains,
Antarctica 49
periglacial 273
Permian period 159–176
extinction 171
marine species 173
mass extinction 147
tillites 169
Petrified Forest, Arizona 178,
180
petrified trees 180, 221Historical Geology