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Back Matter (PDF) Index Page numbers in italic type refer to pages on which illustrations or tables appear. accretion amphibolites 191 at divergent plate boundaries 45-6 analcime 278, 296, 299 incipient, of oceanic crust 325 analcite 70-7 lower crustal igneous material 4, 5, 8 anatectic melts 306 N-S boundary zone, Iceland 151-2 andalusite 256 accretion model, oceanic crust formation 95 andesine 124 accumulation rates, Faeroese lava pile 234--5 andesite 448 acoustic basement 137 basaltic 79, 80, 186, 339, 438 Jan Mayen Ridge 87 peraluminous 65 acoustic basement reflectors 49, 51, 90 tholeiitic 163,445 comprising extrusive basalts 50 Angmagssalik-Scoresby Sund, igneous activity 436 acoustic impedance zone 65 ankaramite 163, 203, 438 actinolite 125 tholeiitic 166 Aegir Ridge 157 anorthite 257 fan-shaped anomaly pattern 158 anorthoclase 412 fan-shaped spreading pattern 85 Anton Dohrn seamount 429 aegirine 376, 409, 411,414, 417 Antrim lava succession 343-4 indicating peralkine parental magma 416 Antrim Plateau titaniferous 411,412,416 flood basalts 217 aegirine-augite 78 persistent volcanism 445 aegirine granite 442 tholeiitic magmatism 446 aenigmatite 411 apatite 441 aeromagnetic anomalies 316 acicular 197 Iceland 147-9 apatite saturation 170 Africa/Europe convergence 30 Apectodinium homomorphum 266 African plate 29 Apectodinium hyperacanthuminformal zone 265, 399 agate 78 ~~ step heating dating 337, 339, 344, 357, 446 agglomerate 365, 366, 373,374, 436 36Ar initialization 203 silicic 376 Ardnamurchan aggregates, glomerophyric 78, 301 K-Ar dating 342 agpaites 447 silicic pyroclastic rocks 371-2 airfall deposits, pyroclastic 320, 325 Tertiary igneous rocks 341-2 albitization 70 Ardnamurchan igneous centre/central intrusive Alisocysta margarita informal zone 265 (volcanic) complex 365,386, 387, 444 Aliuarssik granite 210 Ardnamurchan-Mull, persistent volcanism 445 allivalite 391 Areosphaeridium diktyoplokus 400 Allt Coire Forsaidh, Skye, pyroclastic breccia 367 arfvedsonite 207,376,409 Allt nan Suidheachan, Skye 367 argillification 259 Alpine Orogeny 25 argon and the Rhine Graben 27, 29 closure of rocks to 340-1 Alpine Range, isostatic uplift 27 extraneous 204, 205, 306 alteration 78, 151,245, 257, 295, 299, 300, 305, 367 a complicating factor 203 , chloritic 205 contamination with 203 ! deuteric 217,219 problems with 211 of glass 275-6 inherited 343 hydrothermal 80, 186, 339, 365,440 radiogenic 218,258 hydrous 256, 258 argon diffusion 218 incipient, volcaniclastic sand 409 argon excess 305 interaction with seawater 125, 301 argon loss 217, 258, 312 metamorphic 186 diffusive 343 to smectitic clay 408 discrepancy 259 tuff beds 76-7,78 result of alteration 203, 305 alteration products, Upper Series lavas, V~ring systematic 331 Plateau 70 variable 205, 337 Amdrups Pynt (Nugalik), E Greenland 210 argon migration 255 amphibole 205, 207,210, 257 argon recoil problems 255, 258,260 brown 256 argon release 305 amphibolite facies 190 Arran: 455 456 Index Arran (cont.) asthenospheric flow 19, 20 Central Ring Complex 373 asthenosphericupwelling 45, 330 central volcanic complex 444 Atlantic evolution, age constraints on 201-12 igneous centre 365 Atlantic plate 8 silicicpyroclasticrocks 373 augite 124, 128, 163, 165, 197, 257 Arran and Ailsa Craig 343,346 poikilitic 316 Arran dyke swarm 385 autobrecciation 374 ash bands 322 water-lain 312 ash clouds 78 ash deposits, British Tertiary Volcanic Province 365 Baffin Bay, igneous activity 431-4 ash horizons/layers 90, 141,430, 447 Baffin Bay spreading centre 434 airfall, graded 408-11 Balder Formation(s) 253,254, 255, 260, 261,266-7, Danish 413 280, 400, 407,408 derived from Faeroe-Greenland Province 411- ash marker horizon 325 12 ash marker seismic reflector 412 argillized 397, 403,409 deposition of 331 basaltic 413 pyroclastic activity 265 bentonitic 409, 414 tufts 77, 78 Denmark 395,397-403 Barents Sea margin 50, 423 Limfjord area 401-2 Barents Sea margin (western) negative series 397 early Tertiary volcanism 135-45 positive series 397, 412 geology 135-7 down-wind fallout, British Tertiary Volcanic rifted margin, evolution of 144-5 Province explosive eruptions 445 Tertiary sedimentation and deformation, SW Fe-Ti tholeiite composition 409, 411 Barents Sea and Svalbard 141-2, 144 late Palaeocene-early Eocene 445 volcanism at the Bjanaya marginal high 137, 141, Lower Tertiary strata 445 143 NorthSea 10,446 Barents Sea Platform 421 airfall, graded 409-14 Barents Shelf peralkaline composition 409 two major drainage systems 423-5 Thanet Beds, Lower Tertiary 376 western, Tertiary tectonics and sedimentation Upper Palaeocene 325 421-5 volcanic 395 Barra Volcanic Ridge System 325 ash basalt 54, 119, 130, 132, 186, 257, 293, 315, 316, 342, basaltic 260 368,438, 442 basic primary 253 alkali 197, 233,295,445,447 peralkaline 411 alkali olivine 432, 446 primary 255 altered 163,298 pyroclastic 407 Antrim 361 rhyolitic 411 aphyric 432 subalkaline rhyolitic 447 Baffin Island, dating of 433 tholeiitic 411 basanitic 435 Fe-Ti-rich 447 depleted 125, 127 vitric 255 dipping reflectors 5 volcanic, W Shetland Islands 263 early, fissure-fed 442 ash marker 141 early Palaeogene 130 Balder Formation 325 early Tertiary 123, 124, 225,271 North Sea 260, 442 E Greenland 111,203-4, 266 top Palaeocene 229,234 extrusion of 211 ash marker sequence 254 effect of alteration 148 ash sequence, correlation of Fur Formation, North Sea extrusive 7, 50 and NE Atlantic proposed 400 Faeroe Islands, chemicalgroups 230, 233 ashfall see ash Faeroe Rise 233 assimilation-fractionation model 362 feldspar-phyric 374 asthenosphere flow basalts 51 advection of heat by upward migration of partial glomerophyric 124 melt 11 high-Ti 232 high pressure of, N Atlantic 20 low in Si02 246 hot 3, 8, 9-10, 10-11, 16-17, 44, 45, 111,130 Iow-Ti 232 lateral density variations in 18-19 mid-Atlantic ridge 246, 301 and partial melting 8-10 Mikis-type 170 reduced temperatures 11 olivine 339,343, 344 rising 120 altered 374 Index 457 olivine-microphyric 299 Biscay margin 5, 6-7, 10 olivine-phyric 229, 230, 295 bivalves 278 picrite 177 BjornoyBasin 135, 137, 141,144, 145,421 plagioclase-phyric 124,229, 230, 277,432 Tertiary sediment distribution 141 primitive 433 Bjornoya marginal high 135, 144 quartz basalt 435 postvolcanic vertical movement 137 quartztholeiite, microphyric 435 volcanism 137, 141,143 silica-oversaturated 446 Bjornoya Trough 423-5 subaerial 295, 298-9 Bjornoya-Sorkapp fault zone 144 Tertiary, Wyville-Thomson Ridge and Hebrides black shale facies 306~ Shelf 271-80 Blackstones Bank 345 tholeiitic 51,118, I6I, 197, 233,235,343,431-2, Blackstones Complex 429 445,447 Blind Rock Dyke, Donegal 344 formation of cycles, Prinsen af Wales Bjerge block faulting 325 (PWB) 197-9 Blosseville Group 437 olivine-rich 432 rapid accumulation 438 within plate 297, 305 Blosseville Group basalts 203 basalt genesis and formation of passive margin SW of BlossevilleKyst 181,187,436 Rockall 130-2 basalts, K-Ar ages of and extrusion of 211 basalt lava terrains, Upper Tertiary, Iceland 152 main intrusive centres 202 basaltic differentiates, contaminated 355,356, 357 MORB-type mantle source 182 basaltic melt, Rhum 391 uplift of 21, 22 basanites 436 boreholes 85/58, 85/7 and 85/2B 271-80 baselap 102, 103, 112 Borgtinderne nepheline syenite intrusion 207, 210, dipping reflectors 100 211 basement boundary fault system, W Greenland 433 acoustic 137 breccia 368,436 reflectors 49, 50, 51, 90 crush 374 acoustically opaque I00, 110 explosion 365,369 basaltic (Faeroe islands) 115 hyaloclastite 430 continental metamorphic 226 slope-foot 287 gneiss 181 interbedded 370 opaque, oceanic 90 picritic 433 Precambrian 443 pillow 432 basement elevation 135 pyroclastic 365, 367, 369,370-1,372, 374 basement escarpments, Norwegian-Greenland Sea unbedded 368 43 volcanic 435 basement outcrops, seabed, Faeroe region 226 breccia zone, basal 80 basement rocks, Kangerdlugssuaq area, analysed Brendan Igneous Centre 312, 319, 322, 330, 331 190 emplacement of 322 basement trends, Porcupine Basin 331 late Cretaceous igneous activity 325 basin formation and sedimentation 434 Britain, igneous activity 443-6 basin inversion 25 British Tertiary Igneous Province 25, 80, 217,265-6, basin margin erosion 272 276, 338, 361 basin subsidence 118,432, 435, 445 dating problems 337 basins magmatic affinities 376 fault-controlled 386 regional setting 376-7 Mesozoic 25 relationship to opening of Atlantic 27 pre-opening, Norwegian-GreenlandSea 51-2 time and duration of activity 337-46 rifted 330 Ardnamurchan 341-2 sedimentary 111,445 Arran and Ailsa Craig 343 synclinal 445 Ireland 343-4 syn-rift 321 Lundy 344-5 Basistoppen sill 439 Mull 339-41 bathymetry, N Atlantic, anomalously shallow 7, 11 St. Kilda 345 bauxite 373 Skye 342 Bay of Biscay, graded ash layers 412 Small Isles, the 342-3 beidellite 70 roIe ofpalaeomagnetism 339 Belig deposits, Western Red Hills, Skye, pyroclastic British Tertiary Volcanic Province 76, 268,305,414- breccias 368-9 16, 417,430, 443,444 Bill Bailey Bank 225,229, 230, 233, 271 aegirine 411 biostratigraphy and age, Danish Upper Palaeocene- difficulties in accurate dating of stages of volcanism MiddIe Eocene 395-7,399-400 446 biotite 205, 207, 210, 211,256, 257,258 dyke swarm orientation, control of 384 458 Index British Tertiary Volcanic Province (cont.) Cleveland Dyke 27, 29 regional stress field controlling magmatism 388 clinoptilolite 80 silicic pyroclastic rocks of 365-77 clinopyroxene 70, 78, 187, 192, 197, 263,278 stress and dyke emplacement 381 brown 274 brittle deformation 430 CnpanBreaca, Rhum 369, 370 brookite 411 coal-bearing formation/sequence, Faeroe Islands Bryozoan Sand 265 120, 217, 226, 234, 235, 266, 442 buchites 448 late Palaeocene pollen assemblage 267 Bulimina mMwayensis 263 coal seams, Suduroy 226 bytownite 124, 263,277 coals, devolatized 29 coastal flexure, E Greenland 201,211 Coire Uaigneich granophyre 342, 355 calcite 70, 78, 163, 165, 228 compaction, during crystallization 299 microcrystalline 316 compression 87, 421,422 calderacollapse 372,436 and extension axes, rotation of 386, 388 caldera formation 370 Faeroes 236 surface 375 Sverdrup Basin 222 caldera subsidence 431 Conachairgranite (St.
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