Index 335 Index

Aalenian, Jurassic 119, 134, 263 Aptian, Cretaceous 136,262 Sydney basin 105 Acanthocerataceae superfamily 136 -Barremianboundary 131-3 Devonian 74, 76, 116 Acanthoscaphites, late Cretaceous fullers earth, Surrey 123 -Carboniferous boundary 101 boundaries 194 reliability 120 critical radiometric dates 82 Accretion rates, and heat flux 331 Aquitanian, Miocene 217, 218,231 Ediacaran system 34 Acid volcanics letter stage boundaries 205 late Triassic 107 prejudice against dates 84 marine stages 200 Permian-Triassic boundary 106 radiometric ages 85 stage stratotypes 164 Austrotrillina, Letter classification 205 Adelaide geosyncline succession. 49 Ar-Ar, total-fusion method versus Afanas'yev & Zykov. 1975 time-scale 5, 6 age-spectrum method 89-91 Africa See also Argon Baculites, Maastrichtian 121, 136, 194 East, Pliocene and Pleistocene Archaean Badenian (Orleanian) Neogene 226,249 palaeomagnetic measurements 232 episodic orogenic activity 328 Baigendzinian (Artinskian) Permian 115, Neogene fossil mammals, correlations 232 lithosphere 326-33 116 pre-Cambrian stromatolitic no-growth model versus freeboard 328 Bajocian, Jurassic 119,120, 136,263 limestone 23-4 'plate-jams' 327 Barbados, Bath Cliff, Eocene-Oiigocene South, late Triassic 11)8 sediment subduction 328 boundary 168 Agenian, Oligocene-Miocene 217 tectonic patterns 328 Barentian Akchagylian stage. Central Asia, Miocene time boundary 6, 7 Pleistocene 202 faunal complexes 231 volume and composition 327 Villefranchian 223 Albian, Cretaceous 132, 1.76, 263 Arcille (Baccinello V4) tie point, Barremian, Cretaceous 120,262 Aldanella, early Cambrian, Neogene 248 ammonite chrons 123 Newfoundland 61 Arctica islandica, Mediterranean 21)1) -Aptian boundary 132, 136 Algae, expansion in Pa[aeophytic 6 Ardath Shales, La Jolla, USA 161--2 Barstovian, Neogene tie points 217 AllerCd lnterstadial, Europe 201,202 Arenig, Ordovician 74, 75, 77, 94 Burkeville, Texas 226,249 Alps critical radiometric dates 83, 85--7 Orbulina, Texas 229 central, geochronology 312-14 interim time-scale 262 Pojoaque, New Mexico 226,249 isotopic blocking temperatures 317 stratigraphic intervals 82 Sharkbooth Hill, California 226,249 glacial ages 225 Argentina Skull Ridge, New Mexico 226,249 Southern, Paleogene and Cretaceous 1.71 late Triassic 107 Bartonian, Eocene 136,162 America see United States Permian-Triassic boundary 106, 114 Basalts, NW Iceland, postscript on age of Amitsoq gneiss, Greenland 1.7 Argon, in K:Arages 8 older boundary 232 Ammonite zones discussion 187 Bathonian, Jurassic 262 calculation of mean zone duration 197 Arikareean, Oligocene 164 and Bajocian, equivalence 119-20 Cretaceous 121 -Chadronian boundary 174-5 magnetostratigraphy 134-6 extinction 121, 147 Neogene tie point 226,249-5(/ Bavlinella, Proterozoic 55, 65 Jurassic 119-20 Arkell's zones, Jurassic 273 Bediasites, North American Ammonoid evolution 274-82 Armorican Massif, Brioverian 50.55-6, tektites 169-70 ew)lutionary pattern 275 84 Beglia, Vallesian, Neogene tiepoint 249 appearances 277, 281 Artinskian, ('Baigendzinian'), Belemnella, Maastrichtian 194 extinctions 136,278,280 Permian 115- 16,100, 262 Belemnites, disappearance 147 generic/family level 277 Asataracian, Neogene tie points 215 Belgium, Paleocene-Eocene 160 species level 276 Azov, Ukraine 249 Beni-Chougrane massif, early Turolian 248 successional stages 279 Kleinhadersdorf, Austria 226, 249 Benthic zones, California, calibration 229 time-scale 273-4 Neudorf Sandberg CSSR 226,249 Bergell intrusion, Central Alps 313 young stages 274 Ashgill, Ordovician 74, 75, 82-7, 95 glaciation 314 Arnphimo/7)hina zone, Ulatisian stage 161 interim time-scale 262 Berriasian Cretaceous, reliability 120, 123 Anchitherium, Vallesian, Black Sea 249 Asian mammalian biochronology 230 134, 136,262 Anisian. Triassic I00, 262 Asselian, Permian 115,262 Bessarabian, (Vallesian), Neogene Ladinian 115 Asteroid impact, Cretaceous tiepoint 226,249 Anomaly sequences, single track. extinction 148, 171 Biharian, Pleistocene, Europe 217 S. Athmtic 269-72 Asthenosphere, and lithosphere 331 vertebrate fauna 201,202 Antarctica Astronomical calculations, Neogene Biochronology, compared with geomagnetic ice accumulation. Miocene 206-8 time-scales 206,208 reversal time-scales 145-7 separation from Australia, Eocene 137. Atdabanian, Cambrian Biogenic markers, interpretative 145 Hyolithes and Coleoloides 61 problems 22 Anti-Atlas syenite, Morocco 55 Massif Amoricain, Sinai and China 60, Biostratigraphical groups, resolution and Jbel Boho Volcano 66-7 66- 71,262 precision 275 Precambrian-Cambrian boundary 56-7 Atlantic Oligocene-Miocene boundary, calcareous Anza-Borrego. Blancan, tie point, Neogene carbon isotope record 208 nannoplankton 234-6 226,248 circum-Atlantic dykes 109 foraminifera 233-4 Apectodinium zone, Paleocene 151-2, 176 magnetic anomalies, deep 136 Biotite A. hyperacanthum zone 154, 155, North extension, Cretaceous 137 age spectrum analysis, use in time-scale 158-9,160 North and South, spreading rate 270 construction 91 Blosseville group 158 ocean floor spreading rates 269-72 reliability of dating 83-4 Paleocene-Eocene boundary 155-6, 159 South, magnetostratigraphy 128-9 Biozonal correlation, radiometric data 41 Sparnacianproblem 151-2, 176 Australia Black Sea (Eastern Paratethys) 231 Apodemus, earliest, Crevi[lente 6, Carboniferous-Permian 104-5 Blairinoides, Arcille, late Ruscinian 248 Turolean 226,248 New South Wales 104 Blancan, early, Pliocene 217, 226 Apparent polar wander (APW) track 320 Queensland 104, 105 tiepoint Neogene 226, 248 336 Index

Blocking (closure) temperature, Europe 55, 57-6{I. 65-6 radiometric dating of sediments 69 palaeomagnetic relationship Middle East 60-1,68 Sinian system 49, 52-5 definition 315 North America 61-2 Chron nomenclature Cenozoic 125. 126 estimations 317-18 USSR 51-2 biostratigraphic correlation 127-30 Grenville, Canada 320 sedimentology 286 definition 127, 143 theoretical background 316 time-scales 4-5, 47 detailed structure 130-1 Bohemia. Ordovician 83 Campanian, Cretaceous 121, 123,136,263 Chronotectonic terms 35 Bolide impact, Eocene-Cretaceous 148, anomaly 34, 271 Claibornian, Eocene 171 171 ocean floor spreading rate 271 Clarendonian, late Bolivinoides, Santonian-Campanian 194-5 San Francisco Bay 226,249 Campanian-Maastrichtian 124 Canada S. San Joaquin, California 226,248 Boltwood, B.B., Palaeozoic Era dating 3 Geological Survey, Chronostratigraphic Clarkforkian, Paleocene- Eocene Boom Clay, Rupelian 172 scale 35 North American mammals 153-4, 162 Botanical changes, Eocene 165 Ordovician, Bay of Islands 74, 75 -Wasatchian boundary 160, 162 Bou Hanifia, Tugenian, Neogene Precambrian 17, 24, 35, 61 Clay see 'Red clay' tiepoint 226,248-9 Caradoc-Llandeilo 44-5, 74-8.95 Cleoniceras, late Cretaceous 134 'Boulder Conglomerate" strata 309, 310 graptolite correlation 76 Closure temperature see Blocking Brachiopods. Kazanian 105 stratigraphic intervals, interpolation 82 temperature Bracklesham Beds, SE England 160. 187 summarized age estimate 262 Coccolithus-Helicopatosphaena zone 168 Eocene sea-level 159 Carbon budget, BC changes, Miocene 208 Coleoloides. lower Cambrian 61 Bridgerian. Eocene 162, 163 Carbonate(s) Colorado basin, South Atlantic, Brioverian, Proterozoic microfossils 55, 65 compensation depth (CCD), Eocene, sedimentology 284 see also Massif Armoricain Oligocene 165 Coniacian, Cretaceous 132,136,263 British Columbia, late Triassic 107-8 shallow water see Letter classitication Inoceramus zone 197 British Isles see England: Scotland: Wales Carboniferous Turonian- Coniacian- Santonian 120, Brunhes Normal epoch 202,213 Carboniferous-Permian boundary 104, 123, 197 glacials in Europe 225 114 Conohyus, Austria. Astaracian 249 Pabbi Hills 308 Devonian-Carboniferous boundary Continental Drift. Precambrian 8 see also Matuyama-Brunhes boundary 101, 114 Continental movement, increase during Buckman's ages, ammonoids 273 Dinantian, Scotland 1[)2 Phanerozoic 331 Bulawayan succession 23 Silesian 1{13 Cooling rates, palaeomagnetic evidence Brudigalian, Miocene 200, 206,209 sedimentology 286 315-24, 33(/- 1 Burin Peninsula, Newfoundland 61 time-scale, criteria 99, 100 Corbicula Thanet beds 151 Carbon isotope record. Neogene 208 Coscinodiscus, London clay 156 Cardiopteris- Glossopteris fauna i(14 Cretaceous Caer-Caradoc granophyre, Atdabanian 262 Carnian, Triassic 100, 115,262 Jurassic-Cretaceous boundary 118-20 Calabria, S. Italy, Pliocene- Pleistocene Cassigerinella-Hasterigina zone 168 magnetostratigraphies 131-5 definition 217, 225 Catastrophic extinction, Cretaceous 121, revised dates 135-7 Calc-alkaline crust, addition to continental 147-9 sedimentology 285,286 crust 10 Caucasian, Asia, Miocene 226 -Tertiary boundary 127, 147-9, 175 Calcareous nannoplankton, datum levels Cenomanian. Cretaceous 194, 263 time-scales 120-4 234-6,243-7 Albian 122-3 mass extinctions 148-50 extinctions 121, 147-9 magnetic stratigraphy 132, 136 'quiet zone' 141,271 Eocene 193 Cenozoic 263-4 Creviilente 1-3, 6. Alicante, late Miocene 22{)-3 base redefined 176 Turolian, tie point Neogene 226, Neogene 243-7 biostratigraphy 127-30 248 Oligocene 164, 195, 218-20, 134-6 chron structure 130-1 Cromerian, Pleistocene, Norfolk and Paleocene 192 Eastern S. Atlantic, nannoplankton zones Netherlands 201,202 Paleogene time-scales 264 124-5 Crustal-accretion-differentiation super Pleistocene 225 nannoplankton zonations 124 events (CADS) 10-15 Pliocene 224 Cephalopodenkalk series 276 age bracketing 23-4 Pliocene- Pleistocene 224-5 Chadronian, Eocene 162,164, 174 direct dating 2{)-2 summary 225-6 Chadronian- Duchesnian land-mammal-age indirect dating 22-3 Calibration, key rules 41-5 boundary 164, 171, 174 Crustal characteristics, age, greatest 326 example, Llandeilo-Caradoc 44-5 Chamita, Rio Grande, New Mexico, tie interpretations 332 proposals 43-4 point Neogene 226,248 thickness, and heat flow 326 published data, evaluation 41-3 Chanac Formation, N. Tejon Hills, tie point Cryptoprora, late Eocene 168, 169 California Neogene 248 Cuisian, Eocene 154, 16{), 162 Imperial Valley. Anza-Borrego Blancan Chapadmalalian, S. America, Pliocene 226 Curie Point, ferromagnetism 315,317,318 226,248 Chattian, Oligocene 164, 171, 173,200, Cuyama Pato Red, Arikareean, California La Jolla group 161-2 205 226,247,250 San Bernardino, Mount Eden tie point Chelyadintsevian, Pleistocene :203 Cyanophyta, Massif Amoricain 55, 65 226. 248 Chiasmolithus, middle-late Eocene Cycles, problems in naming, Precambrian Callavia, late Atdabanian 61 165, 176 36 Callovian, Jurassic 119, 120, 134, 136,263 Chihuahua, Mexico, Yepomera tie Cyclicargolithus, Eocene-Oligocene 168, Cambrian point ~t26,248 218 Precambrian-Cambrian 50-62, 65 Chiloguembelina, Rupelian-Chattian 173 Cycloccolithus, Pleistocene 225 Africa 56-7, 66-7 China Cycloclypeus, Letter classification 2{)5 China 52-5, 68-71 Precambrian 68-7{I Cytheropteron, Pleistocene 225 Index 337

Dalradian Supergroup, Scotland 50 Ebersiniania zone, Gauss, Miocene 232 Fission track ages 77, 85 Danian, Paleocene 147, 149, 176 Eburonian, Pleistocene 202 Flagstaff Rim, Wyoming 174-5 calcareous nannoplankton 264 Ectoconus, Torrejonian land mammals Florida, Upper Bone Valley, tie point, end- geochronological scale 136,154 152-3 Miocene 226,248 Darwin, and gradualism 275 Ediacara fauna Fluvial systems, foredeep basins 310 Data, re-evaluation with modern standards correlations in Precambrian 30, 34, 38 Foraminifera 41-2 Precambrian system 6-7 datum levels 162, 164, 167 Datangpo, Cambrian 52 radiometric dating 50 Eocene 190 Decay constants, conventional, 1974-1981 Eemian Interglacial, Pleistocene 200, 21/1, Oligocene 191,233-4 3-6 202 criteria 218-19 Deep Sea Drilling Project (DSOP) sampling Egg size, evolutionary strategy 275 Paleocene 189 development of nomenclature 125, 131 Eielson borehole, closure temperature 318, extinctions 121 Eocene-Oligocene boundary 168, 170 319 Neogene 217 Miocene 209- 12 Eifelian, Devonian 74, 75, 82-7 first and last appearance 236-43 Paleocene-Eocene boundary 158 interim time-scale 262 see also Letter Classification reports 286 Elephas zone, Pinjor tie point, Neogene Foredeep basins 310 see also Himalayas, Deep sea floor, Phanerozoic 226, 248 foredeep basin abyssal plains 286 Siwaliks 232 France deep sea fans 286, 287 Elster I and II, Pleistocene 202 Carboniferous 114 pelagic sediments 286 Emsian, Devonian 74, 75, 82-7, 262 Eocene 165 Deflandrea, Selandian stage 151, 156 England Massif Armoricain 50, 55-6, 84 Deinotherium 232 Aptian 123 Oligocene 172 Dhok Pathan. Siwaliks, last 248 Devonian 76, 82 Paleocene-Eocene 155 'Delmontian" Belridge diatomite 248-9 Ordovician 74, 76, 83 Pleistocene 202 Deltatherium zone, Torrejonian 152 Paleocene-Eocene 160 Precambrian-Cambrian 55-6 Dengying, Cambrian 52 Permian, radiometric dating 57-60 Sparnacian 159 Denmark, Paleocene-Eocene 160 Pleistocene 223 Frasnian, Devonian 74, 75, 78 Danian stage 149-51t Precambrian-Cambrian 57-60 interim time-scale 262 Desmoscaphites, Campanian 121, 194 Silurian 76, 82 Friasian, S. America, Miocene 225 Devensian, Pleistocene 201,202 Sparnacian stage problem 151-5 Fullers earth, Surrey, Upper Aptian 123 Devonian period 73-8 Thanetian stage 150-1 Devonian-Carboniferous boundary 86 Ensenadan, S. America 226 Gauss-Matuyama polarity boundary 300, numerical calibration 81-7 Entoptyg'hus- Gregoryrnus, Arikareean 305-8 comparison 87 175 Gauss/Gilbert reversal 212 constraints imposed 85-7 Eocene 160-5 Gazella, Astaracian, Austria 249 data 82-3 geochronology 162 Gedinnian, Devonian 74, 75, 82-7,262 sedimentology 186 K/Ar dates, Europe 188 Geiger-Nuttall rule 3 time-scale 74, 75 Eocene-Oligocene boundary 165-71, Geological Society of America, premature Dhok Pathan, Maeotian, 'Selenoportax' 175 reliance on geochronometry 61 zone 248 bolide impact 171 Geomagnetic polarity time-scale Diagenesis, geochemical stratigraphy 209 geochronology 164 Cretaceous-Tertiary 147-9 Didymoceras zone, Maastrichtian 121, 194 Lattorfian stage Eocene 160-5 Dinantian, Carboniferous 100, 102 (Priabonian-Rupelian) 166 Eocene-Oligocene 165-71 Dinocyst zone see Apectodinium Equus Datum 228-9 Europe and N. America 121 Dinoflagellates 154, 162, 167 Tatrot biochron 232 magnetic reversals and ocean floor Kap Dalton and London Clay 158 tie point, Neogene 248 spreading 269-72 see also specific names Ercall granophyre, England 50, 57-60, Paleocene 149-55 Dinosaurs, extinction 121, 147-9 67-8 Sparnacian 151-5 Dinskoyan, Pleistocene 203 Erosion rates time-scale 154 Diplomoceras, late Cretaceous 136 estimates 323 Paleocene- Eocene 155-60 Discoaster 166. 172,218 human activity 288 Paleogene 141 Paleocene-Eocene boundary 159-61) palaeomagnetic evidence 315,319-24 comparison, biochronology 145-7 Sables de Bracheaux, Paris Basin 152 Errors, 2 sigma confidence level, in nomenclature 143 Sparnacian problem 151-2 geochronology 81 revised reversal time-scale 143-5 Distichoceras, Oxfordian 274 Etchegoin Formation, Chanac, California Pleistocene, comparison biochronology Dnieprian, Pleistocene 203 248 227 Dominion - Witwate rsran d - Ve n tersdoop Eukaryotes, first appearance 6 see also Palaeomagnetic and isotopic succession (Randian) 32-3 Eulepidina, Letter Classification 204, 205 evidence Doranian, Pleistocene 2112 Exiteloceras 121 Geomagnetic reversal history Dorcadospyris, Radiolarians, Eocene 169 Extinctions, Cretaceous 121, 147-9 ocean floor spreading 269-72 Dracodinium, Eocene- Palaeocene Extrapolation data vs radiometric data 42 polarity duration, irregularity 211-12 boundary 157, 161~ revised time-scale 143-5,214-16 'Dragonian' (Torrejonian) 152-3 FAD (first appearance datum) Geothermal constraints, lithosphere Dryopithecines, first, Astaracian 249 calcareous nannoplankton 234-6, 243-7 dynamics 330-1 Duchesnean, Eocene 162 planktonic foraminifera 233-4, 236-43 Gerling, E.K., age of Earth, estimate 8 -Chadronian land-mammal boundary Famennian, Devonian 74, 75, 82-7,262 Germany 171, 174 Fasciculithus Panian 15tl, 159 Chattian-Vierlandian 174 Duffer formation, dacitic lavas 23 Fiji, Suva Marl, Pliocene 224 Eocene-Oligocene 171-2 338 Index

Geroevskian, Pleistocene 203 Gubbio Long Normal Zone 195 India Gilbert chron see also Italy Eastern, Katahdin batholith 78, 93 correlation, Chamita 248 Gucheng, Cambrian 52 Singhbhum granite batholith 14 normal magnetozones 224 Southern, Precambrian Chitradurga Pliocene 213 granite 11 Giraffids, appearance, Dhok Pathan 232 Hamites, early AIbian 136 Indonesia, late Triassic 107 Givetian, Devonian 74, 75.82-7,262 Hantkenina lnoceramus zone, Coniacian 122. 197 Glacial transport 313-14 early-mid Eocene, 160- l disappearance 147 Glaciations, Pleistocene 200-4,202,225 Eocene-Oligocene 167 International Geological Congress, 25th 3 Giauconite, K:Ar ages 6, 43 Lattorfian nanoflora 172 Interpolation, hazards of subjectivity 81 Glaucony ages Ypresian-Lutetian 176 Iridium anomaly, Cretaceous-Tertiary 149 assessment 264-5,317 Hauterivian, Cretaceous 123. 136. 263 Eocene-Oligocene 171 in time-scale calibration 43, 84 Heat flow, and conductive lithosphere Iron, ferric, precipitation 6 Global Standard Stages, Pleistocene 200 Archaean 330-1 ferrous, photosynthetic algae 6 Globigerapsis, Eocene-Oligocene 161, 165 Proterozoic decrease 331 lrvingtonian, Pleistocene 203,217 Globigerapsis- Truncoromhfides 165 Hectoroceras Ryazanian 119 lsochrons, Rb-Sr, Pb-Pb, Sm-Nd. U-Pb, anomaly 17 Heersian. Paleocene 154 wholerock 1(I-23 Globigerina 121, 173 Helicosphaera Eocene-Oligocene 17(1 see also Chron earliest appearance, calcareous Lattorfian-Rupelian 172 Isopach mapping, sedimentology 284-7 nannoplankton 155 Helme stage. Matuyama-Brunhes Isotopes see names of elements North Dakota 149 boundary 201. 202 Isotopic ages, errors 232 Globigerinita, Middle-late Eocene 164 Hemingfordian, Neogene tie points 217 lsthmolithus. Priabonian 165. 168 Globigerinoides 218, 2 i 9,237 Barker's Ranch, California 226,249 Italy Globoquadrina 219. 237 Midway, Florida 116, 249 Cretaceous 121,131, 132 Globorotalia Seaboard, Florida 249 late Triassic 107 Aquitanian 218 Hemphillian, Neogene tiepoint 217 mass extinctions 147-9 Eocene-Oligocene 167. 176 Chamita 226,248 Oligocene 173 magnetic polarity stratigraphy 237-43 Mount Eden 226,248 Paleocene-Eocene 159. 161 middle-late Eocene 164 Upper Bone Valley US 226. 248 Pliocene-Pleistocene boundary 224 Miocene 220 Yepomera, Mexico 226,248 Oligocene, Lattortian 172 Hettangian, Jurassic 119,120, 136,263 Japan Trench, molecular stratigraphy 209 Oligocene-Miocene 216. 219 Hexaprotodon zone, tie point, Neogene Jaramillo event Paleocene-Eocene 157, 160 248 Pleistocene, Austria 201 Globotruncana, Maastrichtian 124, 194 Tatrot mammal age 232 radiometric estimate 212 Gneiss Himalayas, foredeep margin, Pakistan Jbel Boho volcano, Morocco 56-7.67 complexes, metamorphosed igneous 297-310 Jeitokamenka, Bessarabian, Vallesian 226, intrusions 38 magnetic polarity stratigraphy 298 249 problems in subdivision 35 molasse basin formation 297. 300 Jhel Kas, magnetic stratigraphy 300.301, usage 37 sediment accumulation history 300 307 Hebron, Labrador, 16- 17 rates of facies change 309-10 Jixian system, late Proterozoic 48 Lewisian, NW Scotland, Laxfordian rates of uplift 307-9 Jurassic metamorphism 14 variation in space 305 geomagnetic polarity time-scale 141 Pb-Pb isochrons 15 variation in time 3(15-6 Gondwana, Pangaea disintegration Nfik 15 'Hipparion" datum. Siwaliks 227-8,232 136-7 terms for precursors 37-8 earliest, Nagri 226. 248 magnetic stratigraphy 131, 134 Vikan, Vesterfilen, N. Norway 15, 16 'primigenium', Algeria 249 new analysis of data 119 Gondwanaland separations 137 Hippotherium 227-9 quiet zone 135 Goniatites, ammonoids 275,276 Holmes, Arthur, quoted 3, 8 revised time-scale 136 'Grande Coupure', France, Eocene 165 age of Earth, estimate 8 sea floor spreading 136-7 Granulite-facies metamorphism, Antarctica Phanerozoic time-scale 4 sedimentology 285,286 16 Holocene series. Neogene 200 time-scale, sources of error 118 Graptolite zones, Ordovician 73-4, 89 Holyrood granite. Newfoundland 61 -Triassic boundary base 114 Greenland Hoplitoplacenticeras, late Cretaceous 134 zones, subzones and chrons 119 apparent polar wander 321 Hoploscaphites, Maastrichtian 121 boundary dates 120 East, Palaeocene-Eocene 157-8 Hoppin Hill granite, Massachusetts 61 Eocene-Oligocene 171 Huayquerian, S. America 226 West, Amitsoq gneiss 12, 20 Hungary, Lower Rhyolite, Ottnagian 230 Kap Brewster basalt flow 157, 187 Archaean, Qorqut granite 11 Karangatian, Pleistocene 203 Isua supracrustals 22 K/At dates Kangimut sanmissoq gneiss 20 'Ice ages', Pleistocene 214 blocking temperature 317 Greenstone belt sequence correlations, Iceland, glaciation, Pliocene 207 early-mid Eocene 188 Archaean Ice sheets, North America, Pleistocene (glauconite) dates 6, 43. 264-5 North America 22 224 sanidine versus biotite dating, Canberra South Africa 23, 31 see also Glacials volcanics 84 Grenville loop. apparent polar wander track ictitherium, Khersonian, Vallesian 249 Karginsky event, Siberia 201 32O- 1 leper Clay (Ypresian) 152,154, 156 Kastellios, late Vallesian. Neogene Grenzbitumin zone. time-scale for Triassic Ilerdian, Paleocene 156 tiepoint 248 106 lilinoian, Pleistocene 203 Katahdin batholith. U-Pb zircon dates 74, Grosseto, N. Italy, Arcille tie point 248 Illites, age, and depositional time 69-70 82, 84 Index 339

Kazanian, Permian 100, 115 Ludlow, Silurian 74, 75, 78, 89-90, 262 Matuyama- Brunhes brachiopods 105 and Ashgill 87 boundary, Pleistocene 200-4,202 time-scale 262 data 90 reversal 212 Kelvin, Lord (W. Thomson), age of Earth Ludfordian 85, 86 Menapian, Pleistocene 202 3 Tremadoc 82 Mesozoic fauna, extinctions 147-9 Kerian, Africa 226. 232 Lujanian, S. America 226 see also Cretaceous: Jurassic: Triassic Khaprovian, Asia 226, 232 Lutetian 160,162 Messinian, Miocene, Africa 200, 211,217 Khersonian Ypresian-Lutetian boundary 161, 176 sea-level decline 232 late Vallesian, Ukraine, tie point Neogene Metamorphism, Alpine, and cooling 226, 248 313-14 Pleistocene 231 Mexico, Cretaceous 123 Kimmeridgian~ Jurassic 119, 120, 136,263 Maastrichtian Mica formation, metamorphic 312 magnetozones 135 Campanian 194-5 Microtektites, Caribbean and North -Oxfordian boundary 136 Cretaceous- Paleogene American 167, 168, 169 Kisingirian, Africa, Neogene 226 boundary 120-3,136 multiple strewn fields 169-70 Kisselovia, Eocene 154, 160 disappearance of Mesozoan fauna 147 Micula, Danian 150 Konkian, Asia, Neogene 226 Phanerozoic time-scale 263 Middle East, Precambrian-Cambrian 60 Kungurian, Permian I00, 115. 262 Maeotian, Asia 226,231 Middle Masker Horizon 23 tie point, Neogene 226, 248 Mimomys, Arcille, late Ruscinian 248 Magmatic differentiation Miocene 220-3 Labrador, Hebron gneiss. Pb linear arrays accretion components, data 329 correlation matrix, Tajo basin 231 16 crustal-accretion-differentiation events -Oligocene boundary 210 Ladinian, Triassic 100. 115. 262 10-11 oxygen isotope stratigraphy 206 LAD (last appearance datum) geothermal constraints 330-2 -Pliocene boundary 200,217,223-4, calcareous nannoplankton 234-6, 243-7 Magnetic blocking temperature 315-18 226 planktonic foraminifera 233-4. 236-43 Magnetic lineaments as major control 269 terminal beds, Murcia, Spain 248 Laidlaw Volcanics, Australia Magnetic polarity Miogypsina, letter classification 205 critical radiometric dates 82, 84-5, 86 reversal sequences 215,269 Miotragocerus, Khersonian, Vallesian 249 inconsistency 76 Jurassic to Recent 141-3 Mission Valley Formation, Uintan mammals La Jolla group, San Diego. USA 161-2 Precambrian dating 30 161 Lambert, 1971 time-scale 5 revised 143 -5 Mohnian (late Clarendonian), California, Land barriers and the ~big break' faunal stratigraphy, Himalayan fore deep Neogene, tie point 248 breaks 165 298-310 Molasse basin formation 297, 300 Langhian, Miocene 200,205,226 Magnetobiochronology, Paleocene 154 Moldavian, Asia 226 Laramide orogeny, 65 Ma acceleration 319 Magnetostratigraphic time-scale Molluscan faunas, major changes, Eocene Lattorfian, Oligocene, faunal discontinuity biostratigraphic correlation 127-9 165 (Priabonian-Rupelian) 166, 171-2 chron nomenclature, Cenozoic 125,126 Monograptus, Ordovician-Silurian 89-90 Laurentian Logan Loop 320-1 late Jurassic sections 133 Monteherin, S. American 226 Laurentide Ice Sheet 201 Middle and early Jurassic 134 Montian, Paleocene 154 isotopic composition 208 Paleogene and Cretaceous 131, 132 Moodies group, Swaziland system 31, 167 Lepidocyclina. letter classification 204, 2(15 pelagic limestone sections 132 Morocco, Precambrian-Cambrian 56-7, Lepontine metamorphism, Atps 312 see also Geomagnetic reversal 66, 67 Letter Classification and Neogene 204-6 Makapansgat, South Africa, palaeomagnetic Morosovkan, Pleistocene 203 Lientuo, Sinian 52 measurement 232 Morozovella 150,154, 156,164, 176 Life, earliest manifestations 23-4 Malopolonian, Pleistocene 202 see also Globorotalia Linderina Lutetian 16(I Malvinas basic, South Atlantic, Moskovian, Pleistocene 203 Lithocyclia Eocene-Oligocene 168 sedimentology 284 Mososaurs, disappearance 147 Lithosphere, continental processes and Mammal faunas 152-3 Mount Eden, San Bernardino, California, problems Neogene, principal faunas 226, 227-32 tie point Neogene 226,248 accretion and recycling 328 Africa 222,232 Mull, progression of volcanic activity 323 arc magnetism 329 Europe and Asia 230 Murcia, La Alberca, Turolian, tie point continental freeboard 329 South America 230 226,248 subduction 328. 333 North America, Asia, land bridges 165 geothermal constraints 330-3 standard regional land mammal ages implications 326-8 229 Nagri, 'Hipparian' zone, Neogene tie point Lithostratigraphic usage 33-4 Uintan, La Joila 161 226,248 and chronostratigraphy 32 Mandar granite intrusion, Sinai 60, 66, 68 Namurian, Carboniferous 100, 115,262 definitions 41 Marginal basins, Phanerozoic sediments -Westphalian 103 Lithraphidites, Danian 150 285 Nannofossil zonal correlations, Llandeilo-Caradoc boundary, summarized Marine magnetic reversal sequence (La magnetostratigraphy 127 age estimate 44, 45 Brecque) 215 see also Calcareous nannoplankton: Llandovery, Silurian 74, 75, 78, 82-7 Marsupites, crinoids, Santonian 121 Foraminifera interim time-scale 262 Marthasterites zone 156, 159,160 Nanotetrina, Ulatisian-Narizian 161 Llanvirn, Ordovician 74, 75, 94,262 Martinique, Miocene magnetobio- Nantuo, Cambrian 52 Loess sequences, Moravia 201,2(12 chronological age estimates 223 Nautilus, comparison with ammonoids 275 Logan Loop 320-1 Mass spectrometer, development 13 Neodymium see Sm-Nd London Clay Formation 155 Mass-age distribution, Phanerozoic Neogastroplites 122 Longmyndian, duration, if Precambrian 60 sediments 284-9 Neogene Loxolophus Torrejonian 153 Massif Armoricain, France, Brioverian carbon isotope record 208 Ludhamian, Pleistocene 202 microflora 50, 55-6, 65, 84 continental biochronology 227-32 340 Index

Africa 232 Orbulina comparison with biochronology 145 Asia 230-2 Langhian-Serravallian boundary 221 conclusions 175-7 Equus datum 228 radiometric ages 209-10 Cretaceous-Tertiary boundary 147 Europe 230 Ordovician Eocene 160 Hipparion datum 227 age spectrum data 89, 95 geochronology 162 North America 229 biostratigraphic horizons 89-91 Eocene-Oligocene boundary 165-71 Siwaliks 232 discussion 94 geochronology 164 definition and setting 199 isotope time-scale 73, 74 geomagnetic polarity time-scale 141-3 depositional and deformational processes comparison 78 nomenclature of magnetic polarity 297-310 data 75-7 intervals 143 geochronology and chronostratigraphy fission track ages 77 Oligocene 171-5 211-16,217 numerical calibration 81 Paleocene 149-55 magnetochronology 211-12 alternative plot 86 Danian 149 magnetostratigraphy 212-14 comparison 87 geochronology 154 revised geomagnetic polarity time-scale critical data 82-4 Sparnacian problem 151 214-16 graphical 85 Thanetian 15{1 Letter boundaries, Blow's P and N zones reassessment 93-4 Paleocene- Eocene boundary 155-60 205 recommended time-scale 97 planktonic datum levels and magnetic Letter classification, East Indies 204 sedimentology 286 stratigraphy 189-9{) Mammal faunas 226 -Silurian Boundary 95 revised geomagnetic reversal time-scale Marine Neogene time-scale 225-7 Oligocene 164, 171-7 143 Miocene 220-3 Eocene-Oligocene boundary 165-71 time-scale, calcareous nannoplankton Miocene- Pliocene 223-4 radiometric dates 175 264 Oligocene-Miocene boundary 216-20 letter classification 204-6 Palaeomagnetic and isotopic evidence organic geochemical stratigraphy 2(19 marine stages 200 315-24 oxygen isotope stratigraphy 2116-7 Oiigocene-Miocene boundary 211, blocking (closure) temperature 315 Miocene 206-7 216-211 cooling history 32t)-3 Pleistocene 207-8 ages, compared 210 Greenland 321 Pliocene 2117 calcareous plankton, zones 218-20 Grenville, Canada 32{I Pleistocene 225 radiometric dates 175 magnetic reversals 321-2 Piiocene 224 Orellan, Oligocene 164, 174 volcanic activity, Mull 323 Pliocene- Pleistocene 224-5 Orleanian, Miocene 217 estimations 317- 18 stages 200 Neudorf-Spallte, Neogene tie point 226, isotopic 317 Neogloboquadrina 221-3 249 magnetic 318 New Zealand, Cretaceous orogeny 323 Orthogneiss, Sm-Nd whole-rock isochrons review, erosion rates 323-4 Nidanian, Pleistocene 202 11. 13 theoretical background 316 Nier, Alfred, mass spectrometer 3 Ostrea, Oligocene 151, 172 uplift and erosion rates 319-24 Nontronites Oxfordian, Jurassic 119,120, 134, 1.76,263 see also Geomagnetic polarity chemical data 293 Oxygen Palaeophytic, time boundary 6 Sr-Rb isotopic data 292 extension from hydrosphere 6, 7 Palaeouzunlarian, Pleistocene 203 Norian, Triassic 100, 115, 116, 262 isotope data, late Pleistocene 208 Palaeozoic time-scale, 6, 81 North Sea wells, red shales 159 isotope stratigraphy. Neogene 206-7 critical radiometric dates 82-.7 Norway oxidation of ferrous iron 6 comparison of age estimates 87, 97 Carboniferous-Permian, Oslo Graben plot, 84, 85, 97 104 using biotite ages 86, 91 Finnmark, Varangian epoch 48 Pacific Ocean selection of reliable calibration points 93 opening of Norwegian Sea, Eocene 137, basins. West, sedimentology 286 aims 93 145 North and South, spreading rates 270 proposed ages. discussion 94, 96 Precambrian 16- 17 southern, Sr isotope studies 290-5 Pangaea, events during breakup 136-7 Nfik gneiss, Amitsoq contamination 15 analytical methods 292 Pantolambda, San Juan, Torrejouian 152 Nummolites, Ilerdian-Cuisian 156 deep sea red clays 29{) Paraethomys, Crevillente 6, late Rb-Sr isotope date. nontronites 292 Turolian 226,248 sediment location 291 Parahoplites, Aptian 123 Obolella, Atdabanian 61 seismic profiles 291 Parapodemus, earliest, Alicante, Turolian Ocean floor spreading systems 269-72 Pagonite see Red Clay 248 Ocean(s) Pakistan see Himalayas Paratethys, Eastern. mammalian dating of anomalies 270 Paleocene 149-54 biochronology 13{I- I discussion 270-2 Danian 149 Pato Red sandstone, and "Upper Vaqueros" magnetic lineaments, Mesozoic-Cenozoic Thanetian 150 226,249-50 time-scale 269-72 geochronology 154 Pb-Pb whole rock isochrons 11-24 major changes, Eocene-Oligocene 165 Landenian 151 Pearlette group, palaeomagnetic time-scale, time-scales 271 Selandian 151 USA 203,204 Oldenburgian, Pleistocene 217 Sparnacian 151 Pelagic sediments, mass-age Olduvai Paleocene-Eocene boundary 155-60, 175 distribution 285 Austria 201 Blosseville Group. Greenland 158 Periptychus, Torrejonian 152 palaeomagnetic measurements 232 Ewekoro, Nigeria 157 - Loxolophus 153 Onverwacht Group, Swaziland system, fossil Ilerdian to Cuisian 156 Permian 103-5 biota 21-2, 23, 31 London Clay Formation, and NW Europe base, Schwagerina, Urals 103 Oppel's zones. Jurassic 273 155 Carboniferous- Permian 104-5 d'Orbigny's divisions, Jurassic 273 Paleogene numerical age, comparisons 115 Index 34I

Permian-Triassic 114 Portugal, late Triassic, Messejana California 226, 250 sedimentology 286 Dyke 109 see also Arikareean time-scale, criteria 99-101 Potwar, Pakistan uncertainties 116 Arcille tie point 248 Peru, Carboniferous-Permian 105 Pinjor tie point 226, 248,297 Qinbaikou System, Late Proterozoic 49 Phanerozoic Eon, chronostatic scale 47 Tatrot tie point 226, 248 Quottoon pluton, British Columbia 319 Phanerozoic see also Siwaliks group sediments, mass-age 284-8 Praeorbulina, middle Miocene 22(I Radioactivity, decay constants 11 deep sea floor 286 Praetiglian, Frechen interglacial early use in mineral dating 3, 8 marginal basins 285 complex 202 see also names of minerals mass age distribution 287-8 Precambrian 261-2 Radiolarian zones 162, 164 passive margins 284-5 -Cambrian boundary 47-61, 65-771, and bolide impact 171 time-scale 4-5,262-3 262-3 Neogene time-scale 217 Phiilipsite see Red Clay Cambrian period 61 tektite horizon 169 Photosynthesizing organisms, and ferrous China, Sinian system 52-4, 68, 69, 70 Radiometric methods in time-scale iron 6 conclusions 61, 71 calibration 41-5 Piacenian, Pliocene 200,205,224 Middle East, Arabian massif 60 see also names of minerals Pinjor, tie point, Neogene 226,248 North America 61 Rancholabrean, Pleistocene 203,217 Pitharella, Thanetian-Sparnacian 151 North-west Europe and Africa 55, 65 Randian cycle 32-3 Plankton Anti-Atlas syenite, Morocco 56, 66 Rb/Sr method Cretaceous extinctions 121, 147-8, 171 Ercall granophyre 57-60, 66 blocking temperature 317 datum levels, Eocene 19(I Vire-Carolles granite 55-6, 65-6 measurements, Alps 312-14 Oligocene 191 Palaeozoic and Mesozoic time-scale Southern Pacific 290-5 Paleocene 189 262-3 whole rock systems 10-24, 264 foraminifera see Foraminifera USSR, K-Ar dates 51 apparent ages 43 Oligocene zones 164 chronostratigraphy, biota 34 Reading- Woolwich Beds, Planorotalites, Danian 150, 156 crystalline complexes 35 Sparnacian 151-2 Plants boundary definitions 38-9 'Red clay', South Pacific 290-5 major changes, Eocene-Oligocene 165 terminology 35-7 analytical methods 292 photosynthesis, and ferrous iron 6 imperfections of the record 30-2 chemical data 293-4 Platovian I and ll, Pleistocene 203 [ithostratigraphic units 32-3 Sr-Rb isotopic data 292,294 Pleistocene 199-204,225 misuse of 'markers" 33 Refugian, Eocene 167 Bri',ish Isles 202 usage 33 -4 Relizian (Hemingfordian), Neogene 249 carbon isotope record 208 problems 29 Resolution and precision, biostratigraphy European continental 202-3 geochronology 10-25 275 Germany 202 concordant and discordant dates Reticulofenestra, Oligocene 174, 218 Lower Rhine 202 12-14 Reunion magnetic event 200 Netherlands 202 crustal residence history 11, 17-20 Rhaetian, Triassic 100, 115,262 North American continental 203,226 Pb/Pb linear assays, interpretation 15 Riphean-Vendian boundary 47, 48 Northern France 202 precision, whole-rock isochrons 1 l- 13 Riphean, usage 35 oxygen isotope variations 206-8 summary 24-5 Rohtas, local magnetic stratigraphy 299, Pliocene-Pleistocene boundary 271, supracrustal rocks, dating 20-4 300 224-5 direct 20-2 Rotleigende flora, Poland 202 indirect 22 -4 Carboniferous-Permian 104 Pleochroic halos 3 some time-scales 7 Rugotruncana, Maastrichtian 194 Plesiadapsis, Sparnacian 159 South Africa 31 Rupelian, Oligocene 164, 166, 171-4 Pliensbachian, Jurassic 119, 120, 136,263 stratigraphy, Commission on 47, 48 -Chattian 173 Pliocene 200,217, 224,226 Priabonian, Eocene 162,164-6 -Lattorfian 172, 173 letter classification 204-6 Pridoli, Silurian 74, 75, 82-7,262 -Stampian 172 magnetostratigraphy 212- 16 Profiles, seismic, passive margins 284 Ruscinian, Arcille tie point~ Neogene 217, mammal faunas 226,227-32 Progonomys, Kastellios, Vallesian, Crete 248 Miocene- Pliocene 223-4 248 Rushton schist 58-9 Northern hemisphere refrigeration 207 Proterophytic, time boundary 6 Rutherford, E., mineral dating 3 oxygen isotope stratigraphy 206-7,210 Proterozoic Pliocene-Pleistocene boundary 224-5 chronostratigraphic names 39 Pluton formation Late, definition 47, 48 Sabellarites, Brioverian 65 Alps 313 Australia 50 St. Malo, massif, metamorphism 65, 67, 68 use in dating 23 in China 49, 50 see also Massif Armoricain Pojoaque, Barstovian, New Mexico 249 Europe 50 Sakaraulian, Asia 226 Poland, Pleistocene 202 in USSR 48, 49 Sakmarian, Permian 100, 115,262 Upper Eocene 167 time boundary 6 Salt Range, Pakistan 230, 297, 310 Polarity reversals see Geomagnetic polarity Protoconch size range 274,276 Samarovian, Pleistocene 203 Pollen zonation Protoryx, earliest, Maeotian, Ukraine 248 Samotherium, Khersonian mammals, major extinction 149 Pseudohastigerina, Eocene 156, 168, 172 Vallesian 249 Yeni-Eskihisar, Miocene 228 Lattorfian-Rupelian 173 Sangamon Interglacial, USA 201 Pontian, Asia 226 Rupelian-Charrian 177 Sanidine, Canberra volcanics, resistance to Porticulasphaera, middle-late Eocene 164, Puercan, Paleocene, North American land secondary alteration 84 165, 176 Mammals 154 San Juan Basin, magnetostratigraphy Portlandian, Jurassic 119, 120, 136 Pyramid Hill, S. San Joaquin, 152-5 342 Index

San Miguel Gap, molecular stratigraphy Silurian Barberton, Fig Tree Shale 21-2 209 biostratigraphic horizons 89-91 Onverwacht group 21, 23 Sannoisian 'facies' (Stampian) 172 -Devonian boundary 95-6 Switzerland, Grenzbitumin zone 106 Santacrucian, S. America 226 Palaeozoic time-scale 81-7 see also Alps Santa Cruz, upper Tesuque, Neogene 249 critical radiometric dates 82, 8.7, 85 Santa Margarita, upper. Clarendonian 248 fission track data 85 Taeniolabis Puercan 152 Santonian, Cretaceous 132,136,263 Laidlaw Volcanics biotite age 86 Tajo basin correlations, early Miocene 2.71 anomaly 34, 271 sedimentology 286 Tartarian, Permian 100, 115,262 Campanian-Santonian 121-2, 194-5 time-scales 74.97, 262 Tatrot, Siwaliks Turonian- Coniacian- Santonian 197 Sinai, pre-Lower Cambrian 60, 68 land-mammal age 232 Saucesian (Arikareean) Sinemurian, Jurassic 119,120, 136,263 tie point, Neogene 226, 248 Neogene 226,249 Sinian system. Proterozoic 48.49, 52-4 Tazian, Pleistocene 203 Oligo-Miocene boundary 219-2(I Presinian. Huangling 52 Tectonic activity, Poci 1(I Scaphites, Maastrichtian 121, 122 Sinian-Cambrian boundary 54 Teepee Trail formation, Uintan 163 Schwagerina, base of Permian 1(13 Siwaliks group, Himalayas Tejon Hills, North and South Clarendonian, Scotland fossil mammals 228 tie points, Neogene 248 Carboniferous-Permian 104 Neogene and Quaternary 297-300 Temperature, blocking see Blocking Dalradian supergroup 50 Pleistocene 23(I-2 temperature Devonian-Carboniferous, Borders, Kelso sediment accumulation 307 Temperature estimates, Alpine 82. 1(12, 116 Sm-Nd whole rock isochrons, advantages in metamorphism 312- 14 Clyde, Kintyre 103 Precambrian crustal succession Temporal resolution, note, on magneto-, Midland Valley, Mid-Dinantian 102 22-3 bio-, and radiochronology 232 Silesian 103 South Africa Tertiary, sedimentology 285. 286 Orkney, Hoy lavas 101 Precambrian, Vredefort Dome 17-20 Tethys Sea Ordovician 75, 83 stratigraphic subdivisions .71 closing, Zagros zone dates 230 Precambrian, Archaean Lewisian gneiss Witwatersrand sediments 31 limestones, magnetic stratigraphies 132 15 Soviet Union see USSR Thanetian, Paleocene 149, 150, 176 Lewisian gneiss complex 14 Spain, Late Triassic, Messejana Dyke 109 magnetozone 152 Scourian Cycle 32 Sparnaeian, Paleocene 152, 154 Theocyrtis, late Eocene 168 Scythian, Triassic 100, 115,262 Paris Basin 156 Thermal Sea-level. 125 ka 200- I problem, Paleocene-Eocene 151, 156 demagnetization, magnetic reversals Sedimentation rate Sables de Sinceny 156 321-3 fore deep settings 300- 10 Sphaenolithus, Eocene 165, 168,218 evolution, primitive lithosphere 326-33 Phanerozoic 284-8 Boom Clay 172 see a&o Blocking temperatures deep sea floor 286 Sphaerocongregus, Brioverian 55.65 gradients, cooling and erosion rates 319 mass-age distribution 287 Sphaeroidinellopsis Acme-Zone 224 thermally acquired remanences 320- 1 passive margins 285 Sphenodiscus Maastrichtian 121 Thomas Farm mammals, Hemimdordian sequences, climatic information 209 Spiroplectalammina zone, Astaracian 249 226, 249 cycles 295 Spreading systems, ocean flt• 269-72 Thomson, W. (later Lord Kelvin), probable diagenetic effects 209 magnetic anomalies 270 age of Earth 3 Southern Pacilic Ocean 290-5 search for unifying theory 271 Th/U dates, submerged speleotherms 201 analytical methods 292 South Atlantic 129, 137, 141-5 Thyrsocirtis, Eocene 168, 169 chemical data 293 variation in spreading rates 269 'Tie points', geomagnetic polarity time-scale, deep sea red clays 290 Stampian, Oligocene 171, 172 Neogene 248-5{t discussion and conclusions 294-5 Steinheim vertebrate fauna, Pleistocene Tiffanian, Paleocene, North American Land sediment location 291 202 Mammals 153,154, 155 Seismic proliles, passive margins 284-5 Stephanian, Permian 100. 115. 262 Tiglian Interglacial Complex 202 Selandian, Paleocene 15{I, 151, 154, 176 Steynskraal Metamorphic Zone (SMZ), Tiilites Selenoportax Precambrian I b; Sinian system 49 Siwaliks zone 232 Stockdale Rhyolite datum 8;2, 84, 87 Varangian glaciation 48-50 tie point Neogene 248 Stratigraphy, International Commission on Time-scale, calibration 41-5 Serpentine, great serpentine belt, NSW 65 causes of bias 43 1{)4-5 .see also Biostratigraphy: Deep Sea combination of data 42 Serravalian, Miocene 200,205,217 Drilling Pro iects evaluation of data 41 Shales, apparent age versus time of Stromatolites, Proterozoic 23, 24 exclusive radiometric method 42 deposition 69-7(I Adelaide geosyncline succession 49 extrapolation 42 Shasta Baily batholith, Jurassic 118 China. USSR 49 isotopic and palaeomagnetic evidence, Shaytian, Pleistocene 203 dating of Precambrian 30 cooling, uplift erosion 315-24 Shui jinto, Cambrian 52 USSR 48 key rules 45 Sialic crust Strontium, diffusive loss from whole rock radiometric age vs stratigraphic position age and extent of Precambrian 24 samples, feldspar and biotite 13 44 mantle derived 10-11. 14. 17.24 see also Rb/Sr rejection criteria 43 reworked 17, 24 Subbotina, Paleocene 154 reproducibility 96 Sidi Salem, early Turolian, Neogene tie see also Foraminifera sea floor spreading 269-72 point 248 Sugutan, Africa 226 Tinderetian, Africa 226 Siegenian. Dewmian 74, 75, 82-7,262 Supracrustal rocks see Crustal accretion- Tithonian, Jurassic 263 Silberberg Beds, correlation with Lattortian differentiation super events ((7ADS) Toarcian, Jurassic 119, 120, 1.76 171, 172 Swaziland system Tommotian, Sinai and China 66-71 Silesian, Carboniferous 103 Archaeansediments 21-2 -type fossils. Cambrian 6,262 Index 343

Tongrian. Eocene 164 Eocene-Oligocene 166. 167 Vredefort Dome. South Africa 17-20 Torrejonian Land Mammal Age 152-5. Jurassic 114 crustal evolution 17-18 154 land mammals 152-3 mantle derived source theory 20 Torreya formation. Neogene 249 Late Cretaceous 121. 157. 187 whole rock data plots 19 Tortonian. Miocene 200.205. 221 Miocene 226 Vrica Section. Calabria. Italy. revised Tournaisian. Permian 115. 116. 262 Oligocene 173-4. 217 Pliocene-Pleistocene 225 Toushantuo. Cambrian 52 Ordovician 83 Tremadoc Paleocene 153 Waalian. Pleistocene 202 Ordovician 59.74.75 Pliocene 226 'Wagonroad faunal level'. Utah 153 age base 94. 262 Pleistocene 203.226 Wales stratigraphic intervals, interpolation 82 Silurian 74.76.83 Ordovician 74, 76 Triassic 106-9 see also specific sites Precambrian-Cambrian 60 base (discussion) 114-16 Unstrut. Pleistocene 202 Silurian 74.76 Late Triassic 107-9 U-Pb whole rock isochrons 10-23 Wartanian. Pleistocene 202 Permian-Triassic boundary 106-9 see also Zircon Wasatchian. Eocene. North American Land sedimentology 285. 286 Uplift rates, palaeomagnetic evidence 315. Mammals 153. 154 time-scale, criteria 99. 100 319-24 Wenlock. Silurian 74.75.82-7. 262 Tribrachiatus zone 155-7. 159 Upper Bone Valley. tie point, end Miocene Westphalian. Permian 100. 115. 116.262 Hatchetigbee Formation 156 226.248 -Stephanian boundary 103 Triceratops Beds. USA 121 USSR. Late Proterozoic 49 Wetzeliella zone 151. 155. 156. 159 Trondhjeimite clasts. Arenig 75.78 U-Th-Pb isotopic systems 18 Whin Sill. England. marker for early Truncorotaloides. Eocene 165 Permian 103 Tsiermagalian. Pleistocene 203 Whitneyan. Oligocene 164. 174 Tuffaceous layers. NW Europe 158-9 Valanginian. Cretaceous 123. 136.263 Wisconsin. Pleistocene. late 203 Tugenian (Vallesian). Africa 226 Vallesian. Neogene tie points Witwatersrand sediments, use of Turkanan. Africa 226 Beglia. Tunisia 226. 249 lithostratigraphy 32 Turolian. tie point. Neogene 217 Bessarabian. Black Sea 226. 249 Woolwich- Reading beds. Sparnacian Crevillente 1-3, 6 Alicante 226, 248 Bou Hanifia. Algeria 226. 249 151-2. 156 La Alberca, Spain 226,248 Kastellios. Crete 248 Wrekin Quartzite formation 57-60.67-8 Late Maeotian. USSR 248 Khersonian. USSR 226. 249 Sidi Salem. Algeria 248 Varangian glaciation 48-50 Turonian, Cretaceous 121, 123, 132,136, use in tixing Vendian 50 Xenicodinium 154 263 Vema anomaly sequence, ocean magnetic Turonian- Coniacian- Santonian 197 stripes 269 Yangtze. China. Proterozoic 52 Tuscahoma-Hatchetigbee, USA 156 Vendian. Precambrian 6.7 Yepomera. Hemphillian. tie point -Cambrian boundary 47-50 Neogene 226. 248 Uintacrinus. Santonian 121 Vierlandian. Oligocene 174 Ypresian. Eocene 152. 154. 176 Uintan. Eocene Villafranchian. Piiocene 217 Yugoslavia. Triassic 114 -Bridgerian land mammal age 161-4 Matuyama reversal 202 Yurmatin. Riphean 48 - Duchesnean 163-4 Vire-Carolles granite Ulatisian- Narizian 161 possible rejuvenation 65-6 Zanclean. Pliocene 200. 224 Umbrian Alps. magnetostratigraphy 127. Precambrian-Cambrian boundary 55 late Ruscinian. Arcille tie point 226. 248 131 reliable age 262 Zemorrian. Oligocene 219 Umbrian sequences. Cenozoic Visean. Carboniferous 115. 262 Zimbabwe system. Sebakwian. Bulawayan nannoplankton 124-5 Volcanic activity and Shamvaian groups 31 United States clastic tufts. Fiji 224 Zircons Cambrian-Precambrian boundary 61 Mull 323 fission tracks 43.47 Devonian 74.76 Voihynian. Astaracian. Ukraine. Neogene plutonic sources. U-Pb age 12. 13. 265 Eocene 161 tie point 226. 249 Zramys. Vallesian. Algeria 249