Table Of Content

Geology Subject Index Volume 27 (-type granites Spain, tectonophysics structural geology Oklahoma, geochemistry Syria, structural geology aluminum Abruzzi Italy aftershocks Al-26, Namibia structural geology Alabama, crust Amador County California Absaroka Range California, fractures 7: 601-604 geochemistry Quaternar aggradation 183-186 Amazon Fan absolute age see a Ar/Ar; C-14: K Agnotozoic see Proterozoic Quaternary Pb/Th; Re/Os: Sm/Nd: Th/U: U/Pb Ain France Amisk Group equilibrium structural geology 827-830 geochemistry Alaska, Quaternary 41-26 Amisk Lake Washington, phase equilibria Namibia, weathering 399-402 geochemistry abyssal hills Alabama Ammonia Pacific Ocean, tectonophysic ¢ rus t. Escambia County Alabama Israel, Quaternary abyssolith see batholiths Alaska Ammonoidea see also Goniatitida Acadian Phase Eocene England, stratigraphy 2: 155-158 Canada, plate tectonic Quaternary, Bering Glacier France, stratigraphy New Hampshire, structural geol tectonophys Aleutian Islands Oman, stratigraphy Acanthostega Albatross Cordillera see East Pacific Rise Texas, stratigraphy Acatecan Orogeny Alberta Ammonoosuc Volcanics Stratigraphy hydrogeo Bow River valley amphibole group see clinoamphibole Acatlan Complex Albian amphibolite facies Stratigraphy Europe Brazil, petrology accommodation zones Oman Ireland, structural geology California, plate tectonics Texas New Zealand, petrology China, structural geology albitite Pacific region, tectonophys accretionary wedges Guatemala, geochemistry Anabar Shield Atlantic Ocean, plate tec Alboran Sea Coelenterata Costa Rica tectonophysi anatexis Mediterranean Sea Aleutian Islands Antarctica, geochronology Oregon tectonophysics South Dakota, petro plate tectonics algae ancient ice ages Pacific Ocean plate Antarctic Ocean, Quaternary California, Proterozoic Russian Federation fiatom Nevada, stratigraphy achondrites see Marti: olumbpia New Jersey, stratigraphy acoustical methods California New Mexico, Pennsylvanian continental she lowa, stratigraphy West Virginia, Mississippian petroleum nannofossils, Atlantic Ocean Andean Orogeny actinides see thorium algal mats Chile, structural geology Actinopterygii see Tel California Andes see also Chile active faults ALH 84001 gems, Eastern Cordillera California petrology 7: 669 geochemistry, Eastern Cordillera geochemistry aliphatic hydrocarbons see alkanes lacustrine features, Eastern Cordillera geologic hazards alkali feldspar see K feldspar andesites see also boninite plate tectonics alkali metals see potassium \rizona, structural geology Quaternary tectonophysics alkali olivine basalt California, Quaternary China Galapagos Islands 423-426 Mariana Islands, geochemistry Mexico alkaline earth metals see calcium; magnesium; stron Mexico Mongolia, Quaternary tum Micronesia, geochemistry New Zealand, Quaternary alkanes see methane Peru, structural geology Oregon, Quaternary Allan Hills Meteorites see ALH 84001 Andvord Drift Pacific Ocean, tectonophysics Alleghany Orogeny continental shelf Turkey New Hampshire, structural geology 803-806 Anetoceras active margins alluvial fans see fan deltas angular unconformities Japan, Quaternary alluvium gypt, structural geology Mexico Utah, geomorphology 379-381 salt tectonics petrology Alpine Fault Syria, structural geology plate tectonics Quaternary 995.998 anhydrite sedimentary petrology Alpine Orogeny Western Australia, sedimentary petro active tectonics see neotectonic France, structural geology 6: 503-506; 9: 827-830 logy adakite Kyrgyzstan, plate tectonics 5: 427-430 Annie Spring Fault Philippine Islands, tectonophysics Turkmenia, plate tectonics 5: 427-430 Quaternary Aegean Sea Alps annual growth rings see tree rings structural geology geochemistry, Dora Maira Massif 315-318 Anomalinidae see Cibicidoides aerosols gold ores 641-644 Anomalocaris Greenland, Quaternary petrology 5: 447-450 Trilobita Oregon, Quaternary stratigraphy, Dolomites 383-384 anorogenic granites see A-type granites Africa see also East Africa; Madagascar; North Af structural analysis anorthosite rica; Southern Africa Lepontine Alps 715-718 New Zealand deformation, Belingwe greenstone belt 861-862 Swiss Alps 3 715-718 Antarctic Bottom Water geochemistry, Anti-Atlas 863-864 structural geology, Dauphine Alps 5: 503-506 Brazil, Quaternary structural geology, Belingwe greenstone Altai Mountains Antarctic ice sheet belt 7: 667-668 Quaternary 3; 211-214 Antarctic Ocean African Plate Altyn Tagh Fault continental shelf 683-686 Egypt, structural geology faults 9: 819-822 Quaternary 11: 967-970 GEOLOGY, December 1999 1] Antarctic Peninsula ¢ basin range structure SUBJECT INDEX TO VOLUME 27 Prydz Bay Argentina rurkmenia, plate tectonics Weddell Sea lacustrine features Au see gold Antarctic Plate argon-argon see Ar/Ar Australasia see New Zealand Pacific Ocean, plate tectonics Arizona Australia see also Illawarra Coal Measures: New Antarctica plate tectonics South Wales Australia; Nev continental shelf, Antarctic Peninsula structural geology, La Paz County sures; Queensland Australia eochronology, Transantarctic Moun Arizona Tasmania Australia; Victorii tains 1: 1007-1010 Arkansas Australia hydrology, Victoria Land 527-530 Quaternary 10: 903-906 structural geology, Lachlan plate tectonics, Wilson Terrane 2 7-1090 Arolla Glacier Avalon Zone Quaternary geochemistry Aves Antarctic ice sheet aromatic hydrocarbons see polycyclic aromatic hy Azores stratigraphy, Victoria Land 859-860 drocarbons tectonophysics Anthozoa Arsia Mons B-11/B-10 California, Quate l )31-1034 Arthropoda see Mandibulata; Trilobitomorpha Mariana Islands, geochemistry Anti-Atlas Articulata see Rhynchonellida; Strophomenida Micronesia, geochemistry veochemistry 863-864 artifacts see archaeological sites back-arc basins anticlines ash falls Philippine Sea, tectonophysics Califorina Greenland, Quaternary Saskatchewan, geochemistry Turkey Oregon, Quaternary bacteria Antilles see Lesser Antilles Peru, Quaternary petrology Apennines ash flows Switzerland, geochemistry diagenesis California, Quaternary baddeleyite sedimentary petrology Asia see also Arabian Peninsula; Central Asia; Far Indian Ocean Islands, stratigraphy stratigraphy 535-538 East; Himalayas; Indian Peninsula; Kyrgyzstan Bahama Platform see Blake Plateau structural geology 955-958 Middle East Bahamas Appalachian Plateau Coelenterata 609-612 Quaternary Quaternary Siberia 7: 609-612 Baikal (Lake) see Lake Baikal Appalachians see also Avalon Zone petrology Baimak-Buribai Formation Mississippian Kohistan 2: 139-142 plate tectonics Quaternary, Appalachian Plateau Ladakh 5- 395-308 Baja British Columbia tructural geology plate tectonics, Tien Shan 427-430 stratigraphy Aptian Proterozoic, Nanga Parbat tectonophysics England Quaternary Baja California aquifers Altai Mountains neotectonics Nevada, geologic hazards »: 483-486 Bengal Baja California Norte Mexico Gobi Desert petrology 7: 669 neotectonics Lake Baikal Ar/Ar plate tectonics Siberia 903-906 Alps, gold ores 7: 641-644 Baja California Sur Mexico Yamal 807-810 California, Quaternary 2 138 sedimentary petrok structural geology, Nanga Parbat 999-1002 Canary Islands, petrology Tertiary, Main Central Thrust 487-490 Balanophyllia elegans China, deformation l l Quaternary asthenosphere Costa Rica, Miocene 499-.5()2 Australia, tectonophysics 1: 39-42 Baltic Shield reochronology 1- 363-366 Italy, tectonophysics 6: 563-566 mineralogy Greenland, petrolo 775-77 Romania, mantle 665-666 Baltica Massachusetts, structural geology Norway, orogeny Atlantic Coastal Plain see also Mongolia, deformation Georgia: New Jersey Balut Dike Oregon, Quaternary Paleogene 454 metal ores Vermont, structural ge stratigraphy 139-1142 banded iron formations Vietnam, structural Atlantic Ocean see also North Atiantic Western Australia, metal ores Arabian Desert se¢ Cretaceous 9: 857-858 Bandelier Tuff Arabian Peninsula see Oman geochemistry, Blake Plateau 1147-1150 geochemistry aragonite Miocene 3: 203-206 Barbados Ridge geochemistry paleomagnetism, Mid-Atlantic Ridge |1 : 1043-1046 Barents Sea Archaean see Archean plate tectonics 1115-1118 Quaternary archaeological sites Barbados Ridge 1095-1098 barite Egypt, Quaternary Pliocene 22 Nevada, gold ores Israel, Quaternary Quaternary 795-798: 10 barometry, geologic see geologic barometry Missouri, Quaternary 1: 1011-1014 basaltic domes see shield volcanoes Archean Long Island Sound 2: 189-190 basalts see also alkali basalts; flood basalts; lava Amisk Group, geochemistry stratigraphy, Blake Nose 5: 419-422 mid-ocean ridge basalts; ocean-island basalts Antarctica tectonophysics tholeiitic basalt Brazil Atlantis fracture zone 11: 983-986 Arizona, plate tectonics 79-782 British Columbia Kane fracture zone 11: 983-98¢ Atlantic Ocean, paleomagnetism 1046 New Zealand 2: 1 Mid-Atlantic Ridge 11: 991-994 Mexico, plate tectonics 782 south Africa ‘ 926; | 1091-1094 Atlantic Ocean Islands see also Azores; Bermuda New Mexico, plate tectonics 79-782 Western Austral 5-11 434 Canary Islands Pacific Ocean, paleomagnetism 046 1051-1054 Quaternary, South Georgia 11: 967-970 base-level peneplain see peneplains Zimbabwe 667-668 Aulantic-type margins see passive margins basement tectonics Atlantis fracture zone 11: 983-986 Namibia ircheoiogy see archaeo Atlas Mountains see Moroccan Atlas Mountains basin analysis Arches National Park atmosphere see also aerosols stratosphere; tropo Western Australia, metal ores structural geology 661-662 sphere Basin and Range Province see Great Basin rcs, iSland see California, Quaternary 4: 291-294 basin range structure Arctic Ocean atmospheric precipitation Basin and Range Province, tectono Quaternary Alberta, hydrogeology 3: 223-226 physics Arctic region see Greenland attenuation British Columbia, structural geology arcuate structures California, geologic hazards 1: 15-18 Great Basin, tectonophysics France. structural geology Kyrgyzstan, plate tectonics 5: 427-430 Oregon, Quaternary 1154 GEOLOGY, December 1999 SUBJECT INDEX TO VOLUME 27 basins * C-13/C-12 basins see also back-arc basins; fore-arc t biogeography Bogd Fault land basins; pull-apart basins Atlantic Ocean, Cretaceous Quaternary British Columbia, stratigraphy Florida, Quaternary Bonarelli Level Germany plate tectonics igraphy Idaho Quat bioherms se¢ mound Bonin Islands New Mexic« geochemistry boninite W ester \ istraila Manitoba, geochemistry Italy biologic evolution sec Russian Feder ition, plate tex Jordar { Saskaichewal LOOK Mexic ¢ 199.4 Bonney Sandstone stratigraphy trapoda 637 640 Cambrian Thailand, sedimentation Pacific Ocean, Quaternary 1: 63-66 borderland, continental see continental border Venezuela, Quaternary biomarkers boron Western Australia, sedime S " B B-10 log Strati¢ ip? 899-91)? Mariana Islanc basins, drainage see biomineralization OR3 LORE Micronesia batholiths DK petite eet iCK ST Boso P nsula British ¢ BIOSTRAT 6 49] 494 bottom currents Mexico biostratigraphy yozones nannotossils At ints Ocean, Quaternar Queensland Australia WIeoeCOIOLY. | omorphs 6 49] 494 Brazil Quaternary Washington Atlantic Ocean m features see abyssal hills Bathonian bottom-simulating reflectors Scotland Oregon, plate tectonics Bay of Plenty Bouguer anomalies ocean floors Azores, tectonophysics Be-10 > tectonics Namibia, weathering tectonics beach placers poundaries Western Australia, Quaternar Bow River valley beaches Br Bahamas. Quatert Bermuda, Quat biostromes Western Aust China, T bedding piane biotite Brahmaputra River marks Quaternary bedforms Brazil Namibia, s¢ sedimentary pet bedload hydrology South breccia Indian Ocean, Quatert biozones Ital Philippine Islands, hydr« England ilig Medit Belingwe greenstone belt South Dakota, Cambr brines deformation Birch Lake Assemblage Israe ratigrapnhy Structural geology -ochen \ New South Wales Austra Biticinella Norv eochemistry Bellerophon Formation Bengal ( British Columbia see also Cz ordiller DituMINnOUS SNale see Coast Belt; Coast Mountains; Methow Bas Quaternary Bivalvia see also Venerida Nanaimo Group; Queen Charlotte Basir Bengal Fan Atlan yastal Plain stratigraphy metal ores I{ Quaternary En brittle deformation Benioff zone Gulf Coastal Plain stratigraphy petroleum Canada, plate United Kingdom, stratigraphy Switzerland Bering Glacier Black Giants Anorthosite bromine Bermuda Black Hills Norway Quaternary Cambr Bronson Hill Anticlinorium beryllium Bu Khang Dome Be-10, Namibia black lead see grar Bubble Well Member Betic Cordillera Black Mountains sedin entary petrology tectonophysics Structural geology bubbles bicarbonate ion black shale South Africa, petrology California, stratigraphy Italy, sttrraattiicg raphy Bundenbach BIFs see banded iron formations Blake Nose Stratigraphy Big Lost Trough stratigraphy burial diagenesis Quaternary Blake Plateau Atlantic Ocean bioavailability geochemistry ( British Columbia, Quaternary blind faults Morocc« geochemistry biochemical sedimentation California, Quaternary Burlingame Canyon Antarctic Ocean, Quaternary block structures Quaterné bioclastic sedimentation California folds burrows China Triassic Chile Structural Gern apnhy Italy China, plate tectonics Butte County Idaho Mexico Vietnam struc al geology Quaternary biodiversity blue-green algae see cyanobacteria C see carbon Aves blueschist facies C-1¥C-12 Costa Rica, Miocene Mariana Islands, plate tectonics 106 Antarctic Ocean Qua biogenic structures see algal structures bioherms Micronesia, plate tectonics 103 106 ternary bioturbation; lebensspuren: stromatolites body waves see P-waves: S-waves Arctic Ocean, Quaternary GEOLOGY, December 1999 C-14 « carbonate sediments SUBJECT INDEX TO VOLUME 27 Atlantic Ocean, Quaternary Solano County California 851-854 Canary Islands Califomia folds geomorphology, Tenerife Proterozoik 339.342 Transverse Ranges 39-1042 petrology, Grand Canary stratigraphy 645-648 fractures, Kern County California 7: 601-604 Candona England geochemistry North Dakota, Quaternary Invertebrata Amador County California Candona rawsoni Quaternary Calaveras County California Quaternary Stratigraphy Whipple Mountains Caprimulgiformes geochemistry geologic hazards capture see stream capture San Francisco Bay Caraballo Mountains Jurassic, Santa Barbara County Cali metal ores stratigraphy fornia Caradocian Kenya, Quaternary neotectonics, Los Angeles Basin lowa Morocco, geochemistry etroleum Caravaca Spain Nevada, stratigraphy Santa Barbara Channel stratigraphy Scotland, stratigraphy plate tectonics carbon South Dakota, Cambria San Gabriel Mountains Antarctic Ocean, co’ Spain, stratigraph Proterozoic stratigraphy Death Valley Antarctic Ocean -14 Quaternary Arctic Ocean Antarctic Ocean, Qué Death Valley Atlantic Ocean ternary Lassen Peak California Arctic Ocean, Quaternary Los Angeles Basin England Arkansas, Quaternary 906 Point Conception geochemistry Atlantic Ovean, Quaternary l 878 San Mateo County California lowa Columbia Plateau, Quaternary 4166 Santa Clara County California Kenya Egypt. Quaternary sedimentary petrology Morocco England, Quaternary Santa Maria Basin Nevada Missouri, Quaternary stratigraphy Scotland ew Zealand, Quaternary structural geology South Dakota orth Dakota, Quaternary Death Valley Spain on, geochemistry Hayward Fault Stratigraphy San Francisco Bay C-14 5-9Y0UHH tectoSnainc s,J oaFqruiens noVa llCeoyu nty California Antarctic Ocean Arctic Ocean tectonophysics Arkansas Calaveras Fault Atlantic Ocean ( ée Caiciui Hayward Fault Columbia Plateau Caesarea Maritima archaeological site alifornia Current E gypt (Quaternary California, Quatern England Calabria Italy ‘ambrian Missouri tonophys Antarctica New Zealand Calamites New Mexico North Dakota Calaveras County California Norway Oregon >hemistry Russian Federatior Russian Federatior ] (03-90¢ Calaveras Fault South Australia Tennessee ( 906 fa see tufa South Dakota Venezuela 507-510 calcarenite amden County Missouri Wyoming Mex structural geology organic carbon umpania Italy see N aly; Vesuvius England ‘ampanian strat aphy calcite Egypt Switzerland Syri geochemistry New York Western Interior Structural analysis calcium ampeche Mexico Carbon County Utah structural geology geomorphology North Dakota, Quatet anada see also Northwest Territories; W carbon cycle calcium carbonate ida Antarctic Ocean, contine! ( gold ores, Yellowknife Northwest England, Quaternary Territories Switzerland, geochemist calcium sulfate hydrogeology, Canadian Rocky Moun carbon dioxide Western Au California, stratigraphy Canadian Cordillera England calderas > tectonics, Meguma Terrane Quaternary Canary Islands stratigraphy, Canadian Cordillera Stratigraphy New Mexico, geoche uctural geology, Canadian (C ordillera 243-246 Kenya, Quaternary New Zealand, Quaterr tectonophysics 12 43-1146 Oregon, geochemistry Oregon, Quaternary ‘anada David Fault Switzerland, structural analysi Peru, Quaternary neotectonics carbon-14 see C-14 Caledonian Orogeny s« anadian Cordillera carbonaceous shale see black shale Scandinavia, intrusions petrology carbonate platforms Caledonides Stratigraphy China, Triassi structural geology sedimentary petrology ‘anadian Rocky Mountains carbonate rocks see also carbonates: chalk ctlural ge hydrogeology dolostone; limestone California see also California ¢ ‘anadian Shield see also Northwest Territorie California, Proterozoic 342 San Andreas Fault; Santa Barbara Basin geochemistry, Flin Flon Italy, stratigraphy 35-538 leformation, Salinian Block 12: | 066 Belt 55- 4 31-734 Namibia, structural geology 7-690 gold ores, Superior Province 1051-1054 carbonate sediments see also carbonate platforms Sacramento County California tectonics, Churchill Province 1023-1026 Bahamas, Quaternary 4: 37 5-378 1156 GEOLOGY, December 1999 SUBJECT INDEX TO VOLUME 27 carbonates * Columbia County Florida Bermuda, Quaternary chemica! weathering Clark County Nevada see Las Vegas Nevada carbonates see also aragonite Reunion, soils clastic dikes bonate; siderite Switzerland, geochemistry 2 Missouri, Quaternary eochemistry chemically precipitated rocks see also chert clastic rocks see black shale: breccia: ¢ Morocco, geochemistry Vaporites: iron formations: tula zlomerate; diamictite: mudstone carbonatites Atlantic Ocear 2: 1147-1150 shale: siliciclastics; turbidite geochemistry Pacific Ocean, gec i 12: 1147-1150 clastic sediments see also alluviun Carboniferous see Mississipp chemoherms ravel; mud; sand; silt Cariaco Basin Italy, diagenesis Antarctic Ocean Quaternary chemostratigraphy ean Caribbean Plate California, Proterozoic Egypt. Quaternary Costa Rica clathrates Mexico, petrology Clavilithes macrospira Caribbean region see West Indi geochemistry Caribbean Sea South Dakot clay Quaternary, Cariaco Basi chemosynthesis Nevada, geologic hazards carlin-type deposits Italy, diagenes clay mineralogy Nev ad 1 gold ores chert Alberta, hydrogeology Carmel Formation Nevada, structural analysis Great Lakes, Quaternary structural geology Cheshire County New Hampshire Gulf of Mexico, Quaternary Carpathians see smectite mantie, Vrancea Chiba Peninsula claystone Cascade Range Quaternary Australia, stratigraphy geochemistry Chicxulub Crater Indian Ocean ( retaceous phase equilibria Structura CLIMAP Quaternary Chil Quaternary Cascadia subduction zone China see als i China; Guizhou China climate change Cassidulinacea see Anomal hina; Inner Mongolia China: Xinjiang China Antarctica, stratigraphy catchments see drainage Arkansas, Quaternary cathodoluminescence Kunlun Mountain 9: 819-822 Auantic Coastal Plain, stratig Qinghai-Xizan *lateau 10: 943-946 Aulantic Ocean, Quaternary Caucasus see Gr ng Plateau 7-790 aliformia, Quaternary cavitation f Coastal Plain, stratigraph South Africa 1 California, Quaternary Cayuga Lake Ocean, Cretaceous ironn ( Quaternary cement Chitinozoa ermuda, Quaternary \ sda. strat deration California, stratigray Chiwaukum Schist Quaternary Cenomanian lia, Mississippian Italy chloride ion Cenozoic Arizona Australia clinopyroxene 3ritish Columbia Philippine Islands, meta Clipperton fracture zone CO? coal West Virg Coast Belt strat ip! Alps se Coast Mountains America see Costa Rica: G chlorite Asia see Kazakhstar Scand Central Europe see German chlorophyll ovhvsics Central Indian Ridge : Quate iStal features see shore Cephalopoda see Tetrabranchiat coastal sedimentation Cerro Azul Egypt la nary petrology chain silicates see amphibole g Chotecops ferdinandi Cocos Plate chalk Straligrapl Costa Rica Indian Ocean, Cretaceous chromite Cocos Ridge chalybite see siderite Western Austra Miocene Channeled Scabland Churchill Province coefficient Quaternary Cibicidoides Coelenterata channels Atlantic Ocean, Quaternary Anthozoa, California Mexico, sedimentary petrology Brazil, Quaternary Russian Federation New Jersey, Miocene Circum-Pacific region coesite Philippine Islands, hydrology tectonophysics Far East, phase equilibria Chara Cl-37/C1-35 cold seeps Quaternary Antarctica, hydrology Oregon characteristic remanent magnetization cladistics collapse structures China, faults Aves Peru, Quaternary Chelan County Washington CLAMP Colombia see Eastern Cordillera; Llanos phase equilibria I Oocene Colon Archipelago see Galapagos Islands chemical sedimentation Clark County Idaho Columbia County Florida British Columbia, Quaternary Quaternary 4: 295-298 Quaternary GEOLOGY, December 1999 Columbia Plateau ¢ currents SUBJECT INDEX TO VOLUME 27 Columbia Plateau see Channeled Scabland New Jersey, Miocene China Columbia River Venezuela, Quaternary Germany Qua continental platform see continental shelf Great Basin Columbia Plat continental rise Himalayas Antarctic Ocean, Quaternary Israel mmonwealt of Independent continental shelf see a/so continental margin sedi Italy Kazakhstan: Kyrgyzstan; Russian mentation Kyrgyzstan Urals Antarctic Ocean 8: 683-686 Mexico compression tectonics Quaternary l New Mexico Col bia. gems ). § 600 California, geologic hazards Northwest Territories 133-636 continental slope see continenial rise Norway plate 58 copper Queensland Australia 679-682 Syria ): 633-636 Queensland Australia, geochemistry Russian Federation 7: 649-652 compressional waves copper ores see porphyry copper Turkey cone sheets coral reefs see reefs Turkmenia Canary Islands Cordillera Marianica see Betic Cordillera Zimbabwe conglomerate Cordillera Oriental see Eastern Cordillera lower crust Mexico Cordilleran Orogeny Brazil Connecticut California, plate tectonics California Quaternary core complexes see metamorphic core complexes East Pacific Ocean Islands Middlesex County Connecticut >. 189-190 Costa Rica 3: 239-2 Gi2) Galapagos Islands New HavenC ounty Connecticut 2: 189-190 Miocene 6: 499-502 Germany Connemara Cottian Alps see Dora Maira Massif Norway tructural geology Crater Lake South Africa Conodonta Quaternary Mexico, structural geology 17-410 China, Triassic cratering oceanic crust 387-390 Atlantic Ocean 11: 983-986: 11: 1043-1046 Idiognathodus craters lowa, stratigraphy Mexico, structural geology Azores 11: 991-994 Nevada, stratigraphy Crawford County Missouri Canada 653-656 Ozarkodina structural geolog) \ Canary Islands contact metamorphism Cretaceous East Pacific Ocean Islands onWtaesmhpiongrtaonne ous fault owth faults AlbiEaunr ope GgEaecloucaahpdeaomrgi osst ryI slands continental borderland Oman Indian Ocean 10: 867-870 Gulf of California, Quatert Texas Pacific Ocean 11: 1003-1006 continental crust Apuan 1043-1046 Alaska England Pacific region 8: 675-678 Arizona Atlantic Coastal Plain 1139-1142 Philippine Isiands 2: 1111-1114 Basin and Range Pr Atlantic Ocean 5 11: 983-986 Romania 665-666 California Brazil 2: 1115-1118 Tonga 5: 411-414 China British Columbia 3 195 198 petrology 670-671 Germany California 10: 919-922: 12: 1063-1066 South Africa, petrology 2: 1091-1094 Great Basin Campanian Crustacea see Ostracoda Egypt 7: 633-636 5: 395-3908 Syria 7: 633-636 crustal shortening structura 999-1002 Western Interior California, plate tectonics 8: 703-706 Israel Canada Egypt, structural geology 633-636 Iti Cenomanian, Italy Syria, structural geology 633-636 Kyrgyzstan China crustal thickening 12 Mexico Cyprus Basin and Range Province, tectono- New Mexico Egypt physics Northwest Territ Gulf Coastal Plain California Norw orogeny Indian Ocean 8: 699 plate tectonics Queensland Australia, metamorphism 8: 679-68 K-T boundary tectonophysics Russian Federatior 7: 649-65 Atlantic Ocean Great Basin, tectonophysics Turkey. structural geolog 3: 267 Spain Mexico, plate tectonics 8: 743-746 Turkmenia Lower Greensand tectonophysics 1107-1110 Zimbabwe Maestrichtian, Western Interior crustal thinning deformation Mexico Germany, plate tectonics continental drift se. Mongolia Italy, structural geology Canada Namibia cryptoexplosion features Indian Ocean Islands, stratigra Navesink Formation Missouri, structural geology continental margin see also active margins Price River Formation, geomorphology crystal form Brazil, Quaternary Santonian Western Australia, sedimentary petro British Columbiz Egypt logy Syria crystal fractionation tec Thailand New Zealand, Quaternary California, Quaternar Turonian, Italy crystal growth see also crystal form Costa Rica, Miocene 499-502 Washington Finland, mineralogy Mexico Wealden, England geochemistry plate tectonics 143-746 Cretaceous-Tertiary boundary see K-T boundary New Mexico Stratigraphy 9.72? Crooked Creek impact structure 3: 279-285 geochemistry 6: 495-498: 6 Oregon, plate tect 939-94) crust see also crustal thickening 10: 895-898 tectonics 11: 1023- tectonophysics 10: 895-898 Alabama 7-370 New Zealand, Quaternary 11: 1035- Victoria Australia, plate tectonic 12: 1087-1090 Antarctica, geochronology 11: 1007-1010 Norway, tectonics 11: 1023-1026 continental margin sedimentation continental crust 12: 1107-1110 crystalline rocks Atlantic Ocean, Paleogene \laska 34 Italy, tectonophysics 79-82 Indian Ocean, Quaternary Arizona Cu see copper Japan, Quaternary 763-766 Basin and Range Province currents see bottom currents; ocean currents; turbidity Mexico 0: 935-938 California currents 1158 GEOLOGY, December 1999 SUBJECT INDEX TO VOLUME 27 cyanobacteria * eclogite cyanobacteria Gulf of Mexico, Quaternary 5: 479-480 dolostone China DEKORP Western Australia Proterozoic Germany, plate tectonics domes Triassic delta fans see fan deltas California Cyprididae see Candona deltaic sedimentation Mediterranean Sea, plate tectonics 1: 87-90 Cypridocopina see Cyprididae Egypt, Quaternary 2: 147-150 New Hampshire 803-806 Cyprus see Troodos Ophiolite Indian Ocean, Quaternary 559-562 Utah, geomorphology D/H leltas see fan deltas Vietnam Guatemala, geochemistry dendrochronology see tree rings Dona Ana County New Mexico dacites denudation Pennsylvanian Mariana Islands, geochemistry Alps, gold ores 7: 641-644 Dora Maira Massif Micronesia, geochemistry Himalayas, structural geology 286-287 geochemistry Philippine Islands, tectonophysi Namibia, weathering 399-402 Dorset England Dalradian Western Australia, Quaternary 879-882 stratigraphy Ireland depositional fault see growth faults Doubs France Dane County Wisconsin see Deschutes County Oregon structural geology Danian geochemistry 823-826 drainage basins Spain deserts Alberta, hydrogeology Dansgaard-Oeschger cycles Namibia 399-402 British Columbia, Quaternary Quaternary detachment see decollement hydrology Dardanelles detachment faults Wisconsin, Quaternary structural geology Arizona drainage patterns Dartmoor Atlantic Ocean, tectonophysics 983-986 California, structural geology Quaternary California, geochemistry 259-262 drowned reefs dating, fission-track see fission-track China 3 831-834 dry valleys Dauphine Alps Mexico 247-250 Antarctica, hydrology structural geology Mc li 143-146 DSDP Site 320 Dead Sea Rift Namibia 8: 687-690 paleomagnetism plate tectonics Nepal DSDP Site 335 stratigraphy Peru paleomagnetism Deadwood Formation deuterium see D/H DSDP Site 519 Death Valley Devonian paleomagnetism Proterozoic Quaternary Canada DSDP Site 556 structural geology Famennian, Greenland paleomagnetism debris avalanches Hunsruck Shale ductile deformation Canary Islands Nevada Switzerland debris flows Devonshire England see Dartmoor dune structures Mexico, sedimentary petrology dextral faults see right-lateral faults Namibia decarbonation diachronism Dutch East Indies see Indonesia Decaturville impact structure Nevada, stratigraphy Earth waves see seismic waves decollement diagenesis earthquake prediction Himalayas, structural geology Bahamas, Quaternary California, Quaternary Mariana Islands, plate tectonics 2: 103-106 Bermuda, Quaternary earthquake sea wave see tsunamis Micronesia, plate tectonics 103-106 burial diagenesis earthquakes see also aftershocks; focal mechan Romania, mantle 665-666 Atlantic Ocean 907-910 New Madrid region; paleoseismicity; Q decompression California 4: 311-314 induced earthquakes, Alabama Pakistan, petrology Morocco 863-864 intermediate-focus earthquakes, Spain Decorah Shale Italy 10: 927-930 Israel, plate tectonics Deep Sea Drilling Project see IPOD; Leg syngenesis, Nevada 1: 59-62 Jordan, plate tectonics deep seismic sounding diamictite Klamath Falls earthquakes 1993, Oregon Germany, plate tectonics California, Proterozoic Loma Prieta earthquake 1989, Cali fornia deep-sea fans see submarine fans diamicton New Zealand, Quaternary 995-998 deep-sea sedimentation Russian Federation, Quaternary San Francisco earthquake 1906, California Indian Ocean, Quaternary »: 559-562 diamond Utah, structural geology deformation see also compression tectonics; exten Finland volcanic earthquakes sion tectonics; folds; petrofabrics; shock waves diamonds Peru brittle deformation 12: 1127-1130 Western Australia, petrology Philippine Islands petroleum diaphthoresis see retrograde metamorphism ast Africa see Kenya Switzerland diapirism jast European Plain see Russian Plain California 2: 1063-1066 Indian Ocean, tectonophysics ast European Platform see Russian Platforn Canada, plate tectonics 653-656 salt tectonics ast Mediterranean see Aegean Sea dCgCuhaecinotnaciarhl yer ondIoesfllooarngdmysa ,t iopne,t rolSowgiyt zerland 284:3:: : 271301467533----721311468066 diCaBartliotimifssohr nia,C olsuembdiiam,e ntQaurayt erpneatrryo logy saasstt eaPPsaatcc iiffPiiaccc ifOiscece;e anCS oocuIotshsle aansRdtis d gePse;aec ifGGiaac llaappaaggooss IRsiflta: ndsN orth Mexico 5: 407-410 Didipio Complex cast Pacific Rise plate tectonics 8: 743-746 metal ores ocean floors Missouri 3: 279-285 diffusion astern Alps see Dolomites Mongolia 2: 143-146 dike swarms jastern Canada see Meguma Terrane Nevada, geologic hazards 6: 483-486 Greenland, petrology ‘astern Cordillera Russian Federation, plate tectonics 649-652 dikes gems Utah 7: 661-662 Canary Islands geochemistry Vietnam 1: 67-70 Philippine Islands, metal ores 691-694 lacustrine features Zimbabwe 9: 861-862 South Africa 2: 1091-1094 Eastern Desert deglaciation Dinkidi Deposit structural geology 633-636 Antarctic Ocean, Qua- metal ores 691-694 Eburnean Orogeny see Pan-African Orogeny ternary 2: 179-182; 11: 967-970 displacement theory see continental drift eclogite Arctic Ocean, Quaternary 8: 759-762 Dolomites Ecuador, geochemistry Great Lakes, Quaternary 5: 479-480 stratigraphy : 383-384 Yukon Territory GEOLOGY, December 1999 eclogite facies * faults SUBJECT INDEX TO VOLUME 27 eclogite fa erosion see also denudation; erosion rates; weather Texas, rock mechanics Mexico, stratigraphy ing extension tectonics Norway, geochemistry Canada, plate tectonics 7: 653-656 British Columbia Pacific region, tectonophysics Great Lakes, Quaternary 5: 479-480 Colombia, gems ecology Gulf of Mexico, Quaternary 5: 479-480 Italy California Tonga, tectonophysics 5: 411-414 Mexico, Quaternary Quaternary Western Interior, structural geology 1: 93-95 Zimbabwe economic seol|o gy see individual ¢ erosion features see also erosion surtaces; F see fluorine ecoulement see gravity sliding inselbergs; peneplains facies see amphibolite fac Ecuador see Eastern Cordill Washington, Quaternary 7: 605-608 eclogite facies; granulite Ediacaran erosion rates Faeroe-Shetland Trough Namibia Himalayas, structural geology 11: 999-1002 Famennian South Australia Namibia, weathering 5: 399-402 Greenland Western Australia, Quaternary 10: 879-882 Egypt fan deltas erosion surfaces plate tectonics Russian Federation, Quaternary Namibia, sedimentary petrology 2: 159-162 Quaternary, Nil Far East see China; Indonesia; Japan; Mongolia structural geology eruptions see a/so plinian-type eruptions; volcanic ippine Islands; Thailand; Vietnan earthquakes; volcanoes Ekaterinburg Russian Farallon Plate New Zealand, Quaternary 11: 1035-1038 mMuSSIAaN i t Chile, structural geology sruptive rocks see volcanic rocks El Nino Mexico, petrology Escambia County Alabama Gulf of California, Quater Farrer Member lastic waves see attenuation; se geomorphology Escanaba Trough Elephantidae see Mammuthus Quaternary 463-466 fault blocks see block structures Elephantoidea see Elephantidae escarpments see scarps fault scarps Eleuthera Island Etjo Formation Mexico, neotectonics Quaternary Oregon, Quaternary Eurasia see also Urals Elk County Kansas plate tectonics fault zones Invertebrata Quaternary Atlantic Ocean, plate tectonics 12 95-1098 Elko County Nevada Eurasian ice sheet Mexico, plate tectonics 4: 299-302 old ores Oregon, Quaternary 1: 43-46 Eurasian Plate emerald China, plate tectonics Pacific Ocean, plate tectonics 12: 1095-1098 Pakistar petrology faults see also block structures; decollement: defor Emery County Utah S| tectonophysics mation; fracture zones; geologic hazards; grabens yeomorpho Eureka County Nevada half grabens; shear zones Emu Bay Shale Stratigraphy active faults I ‘ i structural analysis California enamel Europe see also Alps; Centr i ype: Western Europe ( ochemistry, Dora Maira Mass China ogy. Baltic Shield Mexico Mongolia ctonics, Greater Cau 5: 427-430 New Zealand y. Russian Pla 10: 903-906 Oregon raphy Pacific Oce% tural analysis, S pion region Turkey ructural geology. Jura Mountains blind faults, California European Plate see irasia late China eustasy letachment faults Arizona 27-330 zraphy Atlantic Ocean 9R3-_OR6 New Mexico, Pennsylvanian California S= ¥Y-216629 West Virginia, Mississippian China Eutheria see Proboscidea: Rodentia Mexico evaporites see also anhydrite Mongolia tratigraphy Namibia Eocambrian exhalative processes Nepal \ Cyprus, Cretaceou Peru Nevada, gold ores extension faults Eocene exhumation Egypt 7- 633-626 Syna ): 633-636 fornia, tectoni France 6: 503-506: 9: 827-830 Ecuador, geochemistry growth faults 4: 323-326 malayas Israel, stratigraphy 9: 791-794 Proterozoic 525-528 left-lateral faults, China m4 3 7-790 ttuurr g7e0oHl log 11: 999-1002 low-angle faults 27-1 petrology 2: 139-142 Mexico onics Namibia tnam, Structural geology Switzerland Exmouth Plateau Mexico Quaternary Cretaceous normal faults exobiology British Columbia epicenters explosive eruptions see also phreatomagmatism California 7: 601-604 Alabama, crust plinian-type eruption China 187-790 ( fornia, geolog Canary Islands, petrology Himalayas 3: 286-287 epithermal processes extension faults Mexico 3: 247-25 New South Wales Austral I gypt 7: 633-636 Namibia 687-690 Equisetales see Calamite Syria 7: 633-636 Oregon 1: 43-46 Ernietta extension fractures Switzerland 8: 715-718 tratigraphy Nevada, rock mechanics 9: 799-802 Philippine Sea, tectonophysics 12: 1135-1138 1160 GEOLOGY, December 1999 SUBJECT INDEX TO VOLUME Fe * geodesy reverse faults Oklahoma, geochemistry 10: 951-954 France California fluorite stratigraphy Oklahoma, geochemistry 10: 951-954 Paris Basin petroleum fluvial features see alluvial fans; floodplains; rivers Pas-de-Calais France right-lateral faults fluvial sedimentation structural geology California 1: 15-18 hydrology Ain France 27-830 Indian Ocean, Quaternary Dauphine Alps 503-506 Turkey fluvial sediments see stream sediments Doubs France 2 strike-slip faults fluvial transport see stream transport Jura France Argentina focal mechanism Franciscan Complex 2 British Columbia California Free State South Africa see Vredefort Dome California fractures 7: 601-604 Fresno County California China geologic hazards 1: 15-18 tectonics Spain, tectonophysics R- 735.738 Friendly Islands see Tonga EMgoynpgto lia fold and thrust belts Frio Formation Syria California, structural geology zeochemistry Turkey France, structural geology fumaroles tear faults, Colombia aly, structural geology 10: 955-958 New South Wales Australia, metal ores thrust faults Romania, mantle 665-666 functional morphology Argentina fold beits gabbros see also anorthosite Brazil Victoria Australia, structural geology Indian Ocean Islands California Western Australia, metal ores Galapagos Islands I gypt folds see also nappes Miocene Himalayas inticlines petrology Mexico California Galapagos Rift New Hampshire Turkey Miocene South Dakota Galway Ireland see Connemara Victoria Australia Quaterr 5: 391 Ganges River transform faults olombia, gems 597-600 Quaternary California 633-636 Gansu China Israel ructural geology Jordan Gaoyuzhuang Formation Pacific Ocean Proterozoic transverse faults syria garnet group Brazil foliation Far East, phase equilibrii Egypt schistosity, Hima as, petrology Fe see iron Foraminifera se¢ oO. geochemistr Federal District Mexico Atlantic Oce: geochemistry plate tectonics Pakistan, petrology feldspar group see alkali feldspar; plag Scandinavia, intrusion Strat Fennoscandian Shield see Baltic Shie California, Quaternary kon Territory, petrolog Fernandina Columbia Plateau, Quaternary garnet peridotite petrology Norway, orogeny Gulf of Califo: ua, Quaternary Figueroa Deposit Italy, stratigraphy Scandinavia Jurassic New Jersey, stratigraph gas hydrates Finger Lakes see Cayuga Lake Pacific Ocean, Quaternary Oregon Finland Spain, stratigraphy plate tect mineralogy, Lake Lappajarvi Zas seeps fore-arc basins Fiordland National Park Italy, tectonophysics Italy petrology Mariana Islands, plate tectonics gastroliths fires Micronesia, plate tectonics Italy, sediment ary petrol Spain, stratigraphy Russian Federation, plate tectonics Gastropoda fission-track dating Tonga, tectonophysics Atlantic Coastal Plain Thailand, sedimentation foreland basins flexure Western Interior, structural geology Namibia, structural geology FeocheMiIsIry Fortescue Group flexure faults see growth faults OasStal Plain Strat - Flin Flon Belt fossil Lagerstatten see Lag emerald geochemistry fossil soils see Paleosols see gems flood basalts fossil wood ee aren Namibia, sedimentary petrology England, stratigraphy geobarometry see geolog flood tuff see ignimbrite fractional crystallization geochemical centrols floodplains East Pacific Ocean Islands, petrology Northwest Territories Indian Ocean, Quaternary Galapagos Islands, petrology Western Australia, meta Florida New Mexico, geochemistry geochemical cycle see also carbor Quaternary fracture zones see also transform faults British Columbia, Quaternary Columbia County Florida British Columbia, metal ores California, geochemistry Palm Beach County Florida Costa Rica Italy, stratigraphy flowstone see speleothems Mexico, plate tectonics Saskatchewan, geochemistry fluid inclusions see also carbon dioxide Pacific Ocean, ocean floors geochemistry thermometry fractures lithogeochemustry California, Quaternary California ?: 601-604 Australia New South Wales Australia, metal ores extension fractures Japan Philippine Islands, metal ores Nevada 9: 799-80 Saskatchewan Western Australia, metal ores Texas 9: 799-80 Vanuatu fluids, ore-forming see ore-forming fluids Peru, Quaternary 5: 435-438 geochronology see a/so absolute age fluorides see fluorite framestone individual age fluorine China, Triassic 4: 359-362 geodesy see Global Positioning System geochemistry framework silicates see feldspar group; silica minerals baseline interferometry GEOLOGY, December 1999 geodetic networks * Guaymas Basin SUBJECT INDEX TO VOLUME 27 geodetic networks glacial lakes see also varves gouge California, plate tectonics Columbia Plateau 5: 463-466 Mexico, neotectonics geologic barometry Great Lakes, Quaternary 5: 479-480 GPS tracking see Global Positioning New Mexico, geochemistry 6: 555-558 Gulf of Mexico, Quaternary 5: 479-480 grabens Pakistan, petrology 139-142 glacial land forms see glacial features Mexico, plate tectonics Washington, phase equilibria 5: 415-418 glacial maximum, last see last glacial maximum New Zealand, ocean floors geologic hazards see also land subsidence; land glacial sedimentation see glaciomarine sedimentation Oregon, Quaternary slides; seismic risk; slope stability; tsunamis; vol glaciation see deglaciation; glacial extent; ice move Grampian Orogeny canoes ment; ice sheets Grand Canary California glacier outburst floods see jokulhlaups petrology plate tectonics glacier surges granites see also A-type granites; leucogranite structural geolog Alaska, Quaternary matite Spain, stratigraphy glaciers see also rock glaciers Indian Ocean Islands, stratigraphy 351-354 geologic thermometry see also inclusions; P-T Antarctica, stratigraphy Queensland Australia 8: 679-682 paths Switzerland, geochemistry Victoria Australia, structural geology 2: 191-192 France, structural geology 6: 503-506 glaciology see glacial geology Western Australia, gold ores 11: 1051-1054 New Mexico, geochemistry glaciomarine sedimentation granulite facies Norway, geochemistry Antarctic Ocean 8: 683-686 Italy, petrology 5: 447-450 Pakistan, petrology Quaternary 2: 179-182 South Africa, petrology 2: 1091-1094 Washington, phase equilibria glasses see also volcanic glass granulites geomorphologic effects Greenland 7: 621-624 Brazil California, structural geology 6: 515-518 Oregon, Quaternary 7: 621-624 Norway, geochemistry geomorphology see cryptoexplosion features; glacial Glenelg Zone Pakistan reology; impact features; lacustrine features plate tectonics 12: 1087-1090 South Africa, geochemistry mass movements; mud volcanoes; sea-level gliding (tectonics) see gravity sliding graphite hanges; shore features; volcanic features; weath global change see also climate change Finland ering Wisconsin, Quaternary Graptolithina geons Global Positioning System Nevada, stratigraphy geochronology California, plate tectonics 8: 703-706 gravel geophysical methods Mexico, plate tectonics 4: 299-302 hydrology l acoustical methods Globigerina bulloides gravitational differentiation see crystal fractionation ontinental shelf 8: 683-686 Atlantic Ocean, Qua gravitational sliding see gravity sliding etroleum 1047-1050 ternary 9: 795-798; 10: 875-878 gravity anomalies see Bouguer anomalies bottom-simulating reflectors, Oregon 10: 939-942 California, Quaternary 4: 291-294; 11: 1019-1022 gravity faults see normal faults lectrical methods, Quaternary ) 174 Venezuela, Quaternary 6: 507-510 gravity field magnetic methods, plate tectonics 2 1090 Globigerinacea see Globorotaliidae; Hedbergella Basin and Range Province, tectono geophysical profiles see seismic profiles Neogloboquadrina pachyderma; Rotalipora physics geophysical surveys see also acoustical methods Globigerinidae see Globigerina Great Basin, tectonophysics Bc uguer anomalies deet seismic sounding Globigerinoides see Globigerinoides sacculifer gravity sliding magnetic methods; Seabean Globigerinoides ruber Namibia, structural geology Alaska, tectonophysics Atlantic Ocean, Quaternary Nepal, structural geology Atlantic Ocean Globigerinoides sacculifer Great Basin tectonophysic Pliocene plate tectonics California Globorotalia see also Globorotalia inflata tectonophysics folds Pliocene Great Britain see England; Scotland truc tural geolog y Globorotalia inflata Great Estuarine Group ylumbia Plateau, Quaternary Atlantic Ocean, Quaternary Stratigraphy dian Ocean, tectonophysics Globorotalia tumida Great Lakes Italy, tectonophysics Pliocene Quaternary Mediterranean Sea plate tectonics Globorotaliidae see Globorotalia Great Plains Mexico, structural geology Gloeocapsomorpha prisca Quaternary New Jersey, Miocer stratigraphy 11: 1015-1018 Greater Caucasus regon, plate t Glossopteris flora plate tectonics Pacific Ocean Australia, stratigraphy 9: 859-860 Green River Formation Georgia stratigraphy 10: 891-894 Greenland Quaternary glowing avalanche see ash flows petrology geothermal gradient gneisses Quaternary 580-584 France, structural geology Antarctica, geochronology 1007-1010 Tetrapoda Queensland Australia, metamorphism Greenland 9: 775-778 Greenland Ice-Sheet Project see GISP2 eothermal surveys see heat flow Himalayas, structural geol greenstone eothermometry see geologic thermometry New Zealand California, geochemistry rman Southwest Africa see Namibia Vietnam, structural geology greenstone belts Germany Gobi Desert Manitoba, geochemistry plate tectonics Quaternary Northwest Territories, gold ores stratigraphy gold Saskatchewan, geochemistry 5: 455-458 Rhineland-Palatinate Germany Nevada 1: 59-62 Western Australia, gold ores 1: 1051-1054 Giant Mine gold ores see also carlin-type deposits greisen 20ld ores Alps 7: 641-644 New South Wales Australia, metal ores 8: 755-758 GISP2 Northwest Territories 1: 71-74 Grootberg Syncline 8: 687-690 Greenland, Quaternary 580-584 Philippine Islands 8: 691-694 ground water see also aquifers glacial extent Western Australia 1051-1054 Alberta 3: 223-226 Antarctic Ocean, Quaternary 2 Gondwana growth faults 4: 323-326 Aulantic Ocean, Quaternary 10: 875-878 Australia, tectonophysics 1: 39-42 Guadalajara Mexico Russian Federation, Quaternary 9: 807-810 Mexico, stratigraphy 8: 719-722 plate tectonics 1: 51-54 glacial features see glacial lakes; glaciers New Mexico, Pennsylvanian 3: 255-258 Guatemala glacial geology see also ancient ice ages; glaciation Victoria Australia, plate tectonics 1087-1090 geochemistry 629-632 glacier surges; ice movement; ice sheets; ice Goniatites Guaymas Basin wedges; jokulhlaups Germany, stratigraphy 3: 275-278 Quaternary 9: 843-846 Atlantic Ocean Gotlandian see Silurian sedimentary petrology 4: 311-314 1162 GEOLOGY, December 1999