INDEX

Acoustic basement, age in Argentine Basin, 19Acoustic reflectors, Argentine Basin, 8Acuturris, new nannofossil genus, 296Agulhas Fracture Zone, 27, 999Albian foraminifera, 522Albian-Cenomanian foraminifera, 520, 523Aptian-Albian Austral foraminifera, 531Amminoides, 219Andean Cordillera, uplift of, 9Andean-West Antarctic Cordillera, 998Antarctic Bottom Water, 87, 100, 101, 262, 263, 580,

701, 705transport of into the Argentine Basin, 9

Antarctic Circumpolar Current, 1008Antarctic Convergence, 5, 588Antarctic Divergence, 588Antarctic drilling program, 5Antarctic glaciation, 1006Antarctic Intermediate Water, 263Antarciissa conradae Zone, 153Aptian-Albian boundary, 283Argentine Basin, 7, 87

acoustic reflectors, 8age of, 9

Assemblage characteristics, nannos, 291Archaeomonads, Eocene, 689

geologic occurrence of, 689Oligocene, 689systematic paleontology, 690use as guide fossil, 690

Atlantic, Miocene paleoclimatology of, 749Axopodorhabdus, new nannofossil genus, 297Bahia Aguirre, 30Basalt, methods and result, 923Basement calcrete, 216Bathymetric data, method of collecting, 945Beach deposit, 871Belemnites, 214, 219, 1000Benthonic forams, 497Biogeography, late Paleocene Atlantic, 752

Early Miocene Atlantic, 753Oligocene Atlantic, 753

Biostratigraphy,Neogene, 580Paleocene, 752Site 326, 22Site 327, 34Site 328, 96Site 329, 150Site 330, 217Site 331, 262

Biotites, 902Biscutum coronom, new nannofossil species, 297

dissimilis, new species, 298holetum, new species, 297magnum, new species, 298notaculum, new species, 298

Biscutum constans Subzone, 374, 310Bogorovia veniamini Partial Range Zone, 587

defined, 586Boletuvelum, new nannofossil genus, 298Boletuvelum canders, new species, 298Bottom currents, 22, 101, 263, 285

erosion by, 262Late Cretaceous, 537

Braarudosphaera gartneri, new nannofossil species, 310minuta, new species, 310Broinsonia vercandia, new nannofossil species, 299

Burdwood Bank, 30Burrowing, 33, 34, 95, 149, 212Calcareous deposition at high latitudes, 36Calçite,

acieular, 865fibrous, 865post-depositional, 866scolenohedral, 865secondary growth of, 867

Calcrete, 871, 906, 925Campanian-Maestrichtian forams, 522, 532Carbon-carbonate analyses, method of, 12Carbonate compensation depth, 43Cenomanian forams, 520Cenomanian-Santonian hiatus, 531Cenozoic forams, 493

nannos,paleoecology of, 294systematic paleontology, 295

oceanic circulation, high southern latitudes, 1008Centosphaera, new nannofossil genus, 299Centosphaera barbuta, new species, 299Chiastozygus litterarius Zone, 35, 283, 286Chondrites, 95Circumarctic current system, 19, 143, 581, 1006Circumpolar Deep Water (CPDW), 588Climatic deterioration, Antarctica, 1006Cone-in-cone structures, 865Corals, 219, 881Corbisema cuspis, new silicoflagellate species, 711

hastata Zone, 40, 701, 705defined, 707

navicula constricta, new subspecies, 712triacantha Zone, 700

Core disturbance, 11Core labeling, 10Corillithion achylosom Peak Zone, 274, 283, 286Corillithion helotatus, new nannofossil species, 299

perch-nielseni, new species, 310sonarius, new species, 299

Coscinodiscus elliptopora/Actinocyclas ingensConcurrent-Range Zone, 97, 98, 578

kolbei/'Rhizosolenia barboi Range Zone, 97, 578Coscinodiscus lentiginosus Partial-Range Zone, 39, 97,

98, 576, 578, 588Coscinodiscus sp. Zone, 583

1073

Coscinodiscus vigilans-Craspedodiscus coscinodiscusZone, 587

Coscinodiscus vulnificus, new diatom species, 593Cosmiodiscus insignis Partial-Range Zone, 97, 578, 588Cretaceous paleotemperatures, 532Cretaceous-Tertiary Boundary, 259

stratigraphic hiatus, 45Current winnowing, 262Denticula antarctica Partial-Range Zone, 153, 579, 583

antarctica/Coscinodiscus lewisianus Zone, 153, 579hustedtii Partial-Range Zone, 97, 98, 153, 578, 579,

588hustedtii/D. lauta Partial-Range Zone, 97, 153, 578,

579lauta/D. antarctica Partial-Range Zone, 97, 153,

578, 579nicobarica Zone, 583

Diatom biostratigraphy, Neogene, 580Paleogene, 583correlation with calcareous nanno zones, 585method of sample preparation, 575new species,

Coscinodiscus vulnificus, 593Hemiaulus inaequilaterus, 594Nitzschia dementia, 595

Site 326, 22, 576Site 327, 38, 576Site 328, 97, 578Site 329, 153, 578Site 330, 218, 579Site 331, 262, 580Taxonomy, 590Zonation,

Eocene, 585Oligocene, 585Paleogene, 583

Zones,Bogorovia veniamini Partial-Range Zone, 587

defined, 586Coscinodiscus elliptopora/Actinocyclas ingensConcurrent Range Zone, 97, 98, 578Coscinodiscus kolbei/Rhizosolenia barboi Range

Zone, 97, 578Coscinodiscus lentiginosus Partial-Range Zone,

39, 97, 98, 576, 578, 588Coscinodiscus sp. Zone, 583Coscinodiscus vigilans-Craspedodiscus cos-

cinodiscus Zone, 587Cosmiodicus insignis Partial-Range Zone, 97, 578Denticula antarctica Partial-Range Zone, 153,

579, 583D. antarctica/Coscinodiscus lewisianus Zone, 153,

579D. hustedtii Partial-Range Zone, 97, 98, 153, 578,

579, 588D. hustedtii/D. lauta Partial-Range Zone, 97, 153,

578, 579D. lauta/D. antarctica Partial-Range Zone, 97,

153, 578, 579Denticula nicobarica, 583Hemiaulus incisus Partial-Range Zone, 586

defined, 587

H. inaequilaterus Partial-Range Zone, 39, 576,578defined, 584

Melosira architecturalis Zone, 578, 586Nitzschia interfrigidaria Partial-Range Zone, 97,

98, 578, 588N. praeinterfrigidaria Partial-Range Zone, 97, 578Odontotropis klavsenii Zone, 578

defined, 583O. falklandensis Zone, 40Pyrgupyxis eocena/Pterotheca aculeifera Zone,

98, 578defined, 583

Pyrgupyxis (Pyxilla) sp. Zone, 583, 587P. prolongata Zone, 578, 586, 587Rhizosolenia barboi/Nitzschia kerguelensis Par-

tial-Range Zone, 97, 578Sceptroneis sp. A Partial-Range Zone, 576

defined, 583Dictyocha aculeata Zone, 97

deßandrei Zone, 97, 701, 707defined, 704

fallacia, new species, 713frenguelli Subzone, 705

Discoaster/Chiasmolithus ratio as a paleoclimate in-dicator, 753

Discoaster gemmeus Zone, 295multiradiatus Zone (NP9), 38, 150, 153, 276, 286, 295,

296, 583, 746Dissolution, foraminifera tests, 529, 531Distephanus boliviensis boliviensis Zone, 97

crux fenestratus, new subspecies, 714speculum A Zone, 97, 705

defined, 701speculum B Zone, 97, 705

defined, 705Downhole contamination, 12Drake Passage, 7

bottom currents, 19magnetic anomalies, 19nannofossils from, 270opening of, 8, 9, 19, 27, 45, 89, 156, 1008

Dropstones, 858, 864Early Miocene biogeography, Atlantic, 753Eiffellithus turriseiffeli Zone, 34, 38, 283Emiliania huxleyi Zone, 285Ericsonia subdisticha/ Helicopontosphaera reticulata

Zone (NP21/22), 746Ethmorhabdus (?) frondosus, new nannofossil species,

300Eucyrtidium calvertense Zone, 98Euxinic conditions, 212, 214, 866, 896, 998Faceted clasts, 857Falkland-Agulhas Fracture Zone, 1002, 1003Falkland basement, geologic history of, 910Falkland Basin, 7Falkland Fracture Zone, 27, 87, 259Falkland Islands, 270

metamorphic complex, 7mafic dykes, 7

Falkland Plateau,character of basement, 9, 996

1074

circulation of water, 998, 1000heavy mineral suite, 873ice-rafted debris from, 9Late Cretaceous and Paleogene sediments on, 1006orthographic drawing of, 7paleoglacial data, 860predrift setting of, 996Site 329, 143subsidence of, 35, 998

Falkland Trough, 30, 101, 1006Fasciculithus involutus Zone, 34, 38, 269, 583, 585

defined, 274tympaniformis Zone, 295, 296

Ferromanganese nodules, 858Flood-plain conditions, 871Foraminifera

Albian, 522, 523Albian-Cenomanian, 520Aptian-Albian, 531assemblages,

Site 327, 519 ^benthonic, 497, 524

Assemblage I, 497Assemblage II, 498Assemblage III, 498Assemblage IV, 499Assemblage IVa, 499

Campanian-Maestrichtian, 522Cenomanian, 520comparison with other DSDP Southern Hemisphere

sites, 528comparison with continental assemblages, 528correlation of Site 327 with Site 33O/33OA, 522dissolution of, 524, 531lysocline, 525Miocene, 496Oligocene, 496Paleocene/Eocene, 496new species, Globigerinelloides impensens, 541paleoecology of, 524Pleistocene, 497provinces and dissolution facies, 529provinces, Campanian-Maestrichtian, 532Santonian, 522Site 326, 23, 493Site 327, 36, 494

paleoecology of, 37, 524Site 328, 97, 494Site 329, 151, 494

benthonic, 152Site 330, 218

benthonic, 218taxonomy, 500, 541test dissolution of, 520Tethyan assemblages, 532Zonation,

Globorotalia inflata, 151, 497truncatulinoides, 151, 494, 497Morozovella subbotinae Zone, 496M. velascoensis Zone, 496Planorotalites pseudomenardii Zone, 152, 496Subbotina angiporoides, 151

Zone N6-7, 496Zone N16 (U. Miocene), 151Zone P18-P20, 152Zone P21, 496

Fossil preservation, 35Garnets, 905Gault Clay, 283, 300Geochemistry of basalts, 896Geochemical studies of sediments,

Site 328, 929Site 329, 929

variations at, 930Geochemology, Gondwanaland, 926Geophysical observations, Leg 36 underway data, 945Glaciation, implications for in East Antarctica, 860Globigerinelloides impensens, new foraminifera species,

520Globorotalia inflata Zone, 151, 497

truncatulinoides Zone, 151, 494, 497Gondwanaland, initial break-up of, 998Gondwanian orogeny, 221Gondwanide fold belt, 226, 998Gneiss, metasedimentary, 215Grain-size analyses, method of, 12Granite pegmatite, 216, 895Gypsum veins, fibrous, 866Helicopontosphaera reticulata (NP22) Zone, 746Heliolithus kleinpelli Zone, 295

riedeli Zone, 295sp. A., new species, 296universus, new species, 296universus Zone, 34, 38, 270, 276, 295, 296, 583, 585

defined, 274vema zone, 98

Hemiaulus inaequilaterus Partial-Range Zone, 39, 576,578

defined, 584new species, 594incisus Partial-Range Zone, 587

defined, 586Horizon A, 87, 89, 99, 180, 101, 259, 994, 1005

nature of, 9Horizon B, 87, 89, 100, 101Hydrocarbon generating capability, Mesozoic

sapropelic claystone, 941Icebergs, 103Ice-rafted material, 9, 34Ice-shelves, Antarctic, age of, 860Inoceramus, 32, 33, 212, 217, 219, 221, 226, 520, 522Ismolithus recurvus Zone, 286Jeletzkiella, new genus, Mollusca, 847Jeletzkiella falklandensis, new species, 847Jurassic nannofossils, paleoecology of, 291Jurassic marine transgression, 871Karroo Supergroup, 998Lapideacassis tricornis, new species, 301Late Cretaceous bottom currents, 537Leg 36, objectives, 5

background, 5program modifications, 7

Lithological summary,Site 326, 20

1075

Site 327, 31Site 328, 90Site 329, 145Site 330, 211Site 331, 260

Lodo Formation, 295Lower-middle Albian nannofossils, paleoecology of,

292Lucianorhabdus arborius, new species, 301Lysocline, foraminiferal, 525Magallanes Basin, 101Magnetic anomalies,

South Atlantic Basin, 7Anomaly 33, 259, 263Anomaly 34, 259

Malvinas Outer Basin, 7, 87, 102, 1007late Mesozoic-late Eocene sedimentation on, 1004

Manganese nodules, 23, 101, 857, 993Marine transgression, Jurassic, 880Maurice Ewing Bank, 27, 40, 150, 154, 215, 271, 1006

See also: Site 327 and Site 330,Megafossils, 32, 214, 215, 217, 219, 221

See also: specific fossil names,Mesozoic, 846, 881

Melosira architecturalis Zone, 578, 586Mesocena apiculata subzone, 705

circulus Zone, 97, 154, 701, 707defined, 704

circulus/M. diodon Zone, 704, 707defined, 701

diodon, 97, 154, 701, 704Metasedimentary gneisses, 215, 871Microsyenite intrusion, 216, 881Mid-Atlantic Ridge offset, 1002Miocene, climatic history of, 749Miocene foraminifera, 496Miocene-early Pliocene stratigraphic hiatus, 588Miocene-Oligocene boundary, 153, 285, 583, 587Miocene-Pliocene boundary, 581Misceomarginatus, new nannofossil genus, 301Misceomarginatus pleniporos, new species, 301Monomarginatus, new nannofossil genus, 301Monomarginatus pectinatus, new species, 301

quaternarius, new species, 302Morozovella subbotinae Zone, 496velascoensis Zone, 496

Mozambique Ridge, tholeiitic basalt, 7Nannofossils, calcareous,

assemblage, characteristics of, 291late Paleocene, 746Oligocene, 747Miocene, 749

biogeography of, 745Cenozoic, 294Discoaster/Chiasmolithus ratio as a paleoclimatic

indicator, 753early Miocene, 746Jurassic, 291lower-middle Albian, 292method for analyzing, 274middle-late Miocene, 746Miocene migrations of, 749Neocomian-Aptian, 291

new genera,Genus Åcuturis, 296Axopodorhabdus, 297Boletuvelum, 298Centosphaera, 299Misceomarginata, 301Monomarginatus, 301Okkalithus, 302Orastrom, 303Phanulithus, 304Pharus, 304Seribiscutum, 310Teichorhabdus, 306

new species,Braarudosphaera gartneri, 310

minuta, 310Biscutum holetum, 297

coronum, 297dissimilis, 298magnum, 298notaculum, 298

Boletuvelum candens, 298Broinsonia vercundia, 299Centosphaera barbata, 299Corollithion helotatus, 299

senarius, 300Corollithion perch-nielseni, 310Ethmorhabdus (?) frondosus, 300Heliolithus universus, 296Heliolithus sp. A., 296Lapideacassis tricornis, 301Lucianorhabdus arborius, 301Misceomarginatus pleniporus, 301Monomarginatus pectinatus, 301

quaternarius, 302Okkolithus australis, 302Orastrum asarotum, 303Palaeopontosphaera erismata, 303Phanulithus additus, 304Pharus simulacrum, 304Retecapsa tridentata, 306Seribiscutum bijugum, 310Sollasites falklandensis, 311

thiersteini, 311Teichorhabdus ethmos, 306Vekshinella (?) par ma, 307

paleoecology, 291Site 326, 23, 289Site 327, 37

as indicators of surface water temperature, 38Site 328, 97, 291Site 329, 152, 283Site 330, 218, 286Site 331, 291Taxonomy, 295, 759zonation, 271

Biscutum constans Subzone, 274, 310Chiastozygus litterarius, 35, 283, 286Corollithion achylosum peak Zone, 274, 283, 286Discoaster gemmeus Zone, 295

multiradiatus Zone (NP9), 38, 150, 153, 276,286, 295, 296, 583, 746

Eiffellithus turriseiffeli Zone, 34, 38, 283

1076

Emiliania huxleyi Zone, 285Ericsonia subdisticha I Helicopontosphaera reticu-

lata Zone (NP21/22), 745Fasciculithus involutus Zone, 34, 38, 276, 583, 585

defined, 274Fasciculithus tympaniformis Zone, 295, 296Helicopontosphaera reticulata Zone (NP22), 746Heliolithus kleinpelli Zone, 295

riedeli Zone, 295universus Zone, 34, 38, 270, 276, 295, 296, 583,

585defined, 274

Isthmolithus recurvus Zone, 286Nephrolithus frequens Zone, 34, 36, 38, 294, 522Orthostylus tribrachiatus Zone, 34, 150, 153, 276,

286, 295Parhabdolithus angustus Zone, 35, 38, 283, 520Prediscosphaera cretacea, 35, 38, 218, 274, 283,

286, 300, 307, 310, 311, 520Sphenolithus predistentus Zone (NP23), 746Sollasites falklandensis Subzone, 286, 311

defined, 274Tranolithus orionatus Subzone, 307

defined, 274Tribrachiatus orthostylus Zone, 745Vekshinella stradneri Zone, 288

Naviculopsis biapiculata Zone, 97, 154, 701, 704, 707constricta, 701, 705

defined, 705trispinosa subzone, 705, 707

Navigation, methods of, 945Neocomian-Aptian nannofossils, paleoecology of, 291Nepheloid layer, 104, 262Nephrolithus frequens Zone, 34, 36, 38, 294, 522Nitzschia dementia, new species 595

interfrigidaria Partial-Range Zone, 97, 98, 578praeinterfrigidaria Partial-Range Zone, 97, 578

Oceanic circulation, high southern latitudes, 1008Oceanic formation, 583Odontotropis falklandensis Zone, 40

klavsenii Zone, 576defined, 583

Okkolithus, new nannofossil genus, 302australis, new species, 302

Oligocene biogeography, Atlantic, 753foraminifera, 495

Onychites, 219, 829Orastrum, new nannofossil genus, 303

asarotum, new species, 303Orthostylus tribrachiatus Zone, 34, 150, 153, 276, 286,

295Ostracodes, Site 327, 37Oxfordian-Aptian stratigraphic hiatus, 884, 886Oxygen minimum zone, 1000, 1001Palaeopontosphaera erismata, new nannofossil species,

303Paleocene biogeography, Atlantic, 752

Eocene boundary, fossils of, 8foraminifera, 496

Paleoclimatology, Atlantic in the Miocene 749Paleoecology, nannofossils, 291

foraminifera, 524Paleoenvironment, silicoflagellates, 700

Paleogene biostratigraphy, 583Paleoglacial data, Falkland Plateau, 860

implications from coarse detritus in sediments, 857Paleomagnetic time scale, 578, 581Paleotemperatures, Cretaceous, 532

as determined from silicoflagellate occurrences 699,700

Palynologydinoflagellates, 817South Atlantic, 761taxonomic list, 817

PalynomorphsSite 327, 410, 761, 819Site 328, 99, 764Site 330, 219, 765, 819correlation with other sections, 764, 765Early Cretaceous, 763, 765early Tertiary, 761environment of deposition, 764, 765, 766Late Cretaceous, 762Late Jurassic, 765Mesozoic, 817

Parhabdolithus angustus Zone, 35, 38, 283, 520Pelecypods, 214Phanulithus, new nannofossil genus, 304

additus, new species, 304Pharus, new nannofossil genus, 304

simularium, new species, 304Physical properties of sediments,

Site 327, 33Site 328, 95Site 329, 149Site 330, 216Site 331, 262

Plagioclases, 906Planorotalites pseudomenardii Zone, 152, 496Plant material, 95Pleistocene foraminifera, 497Polar Front, 588Prediscosphaera cretacea Zone, 35, 38, 218, 274, 283,

286, 300, 307, 310, 311, 320Pseudomicromarsupium, new silicoflagellate genus, 716

gombosum, new silicoflagellate species, 716Pyrgupyxis eocena/'Pterotheca aculeifora Zone, 98, 578

defined, 585Pyrgupyxis (pyxilla) sp. Zone, defined, 583, 587

prolongata Zone, 578, 586, 587Quartz grains, analysis of, 858

glacial surface morphology of, 858Radiolaria

Site 326, 23Site 327, 98Site 329, 153Site 330, 219Site 331, 262zonation

Antarctissa conradae Zone, 153denticulata Zone, 98

Eucyrtidium calvertense Zone, 98Helotholus vema Zone, 98Stylatractus circulus Zone, 98

universus Zone, 98Theocalyptra bicornis spongothorax Zone, 98

1077

Reflection profile, correlation with lithology, 40, 99,154, 220, 981, 982

Retecapsa tridenta, new nannofossil species, 306Rhizosolenia barboi/Nitzschia kerguelensis Partial-

Range Zone, 578Rifting, Africa and South America, 884Ripples, giant, 262, 263Santa Cruz Formation, 873Santonian foraminifera, 522Sceptroneis sp. A Partial-Range Zone, 576

defined, 583Scolecodonts, 219

paleoecology of, 829Site 330, 829systematic paleontology, 830

Sediment accumulation rate,Site 327, 42Site 328, 102Site 329, 146, 148, 156Site 330, 885

Sediment classification, 15Seismic reflection data, method of collecting, 945, 973

profiles, correlation between sites, 971, 983Seribiscutum, new nannofossil genus, 310

bijugum, new species, 310Serie Riodacitica, 310, 871Serie Andesitica, 871Shallow-water pre-Neogene biostratigraphy, 22Silicoflagellates, biostratigraphy, 700

history of study, 697Leg 36, 697new genera

Genus Pseudomicromarsupium, 716new species

Corbisema cuspis, 711Dictyocha fallacia, 713Pseudomicromarsupium gombosom, 716

paleoenvironmental use for, 699, 700Site 327, 40, 705, 884Site 328, 97, 705Site 329, 154, 707Site 330, 218, 707Site 331, 707systematic paleontology, 707zonation, 701

Corbisema hastata Zone, 701, 705defined, 705

Corbisema triacantha Zone, 700Dictyocha aculeata Zone, 97

deflandrei Zone, 97, 701, 707defined, 704

frenguelli Subzone, 705Distephanus boliviensis boliviensis Zone, 97

speculum A Zone, 97, 701, 705defined, 701

speculum B Zone, 97, 705defined, 701

Mesocena apiculata Subzone, 705circulus Zone, 97, 154, 701, 707

defined, 704Mesocena circulus/M. diodon Zone, 701, 704, 707

defined, 701

Mesocena diodon Zone, 97, 154, 701, 704Naviculopsis biapiculata Zone, 97, 154, 701, 704,

707constricta Zone, 701

defined, 704trispinosa Subzone, 705

Site 326, Drake Passage, 19background and objectives, 19biostratigraphic summary, 23diatoms, 576foraminifera, 493lithological summary, 20nannofossils, 289paleoglacial implications, coarse detritus in sedi-

ments, 857site survey and operations, 19

Site 327, Maurice Ewing Bank, 27biostratigraphic summary, 34correlation of reflection profiles with lithology, 40diatoms, 37, 576foraminifera, 36, 494, 519, 524lithological summary, 31megafossils, 846nannofossils, 37, 275objectives, 32organic material in sediments, 40ostracodes, 37paleoecology, 35paleoglacial implications, coarse detritus in

sediments, 857palynomorphs, 40, 761, 819physical properties, 33preservation of fossils, 35Radiolaria, 40sediment accumulation rate, 42silicoflagellates, 38, 705Sonobuoy, 30survey and operations, 30

Site 328, Malvinas Outer Basin, 87background and objectives, 87correlation of reflection profiles with lithology, 99diatoms, 578foraminifera, 494geochemistry of sediments, 929lithological summary, 90nannofossils, 291operations, 89paleoglacial implications of coarse detritus in sedi-

ments, 858Palynology, 764sediment accumulation rate, 102silicoflagellates, 705site survey, 89summary and conclusions, 100, 994

Site 329, Falkland Plateau, 143background and objectives, 9, 143biostratigraphy, 150correlation of reflection profiles with lithology, 154,

977diatoms, 578foraminifera, 495geochemistry of sediments, 929

1078

lithological summary, 145nannofossils, 283operations, 143paleoglacial implications of coarse detritus in

sediments, 860physical properties of sediments, 149sediment accumulation rates, 146, 156silicoflagellates, 707site survey, 143summary and conclusions, 154, 994

Site 330, Maurice Ewing Bank, 207background and objectives, 9beef-in-shale textures, 865biostratigraphy, 217cone-in-cone structures, 865correlation between reflection profiles and lith-

ology, 220diatoms, 218, 579foraminifera, 218, 527, 578lithologic summary, 211megafossils, 846nannofossils, 218, 286organic material in sediments, 941palynomorphs, 219, 765, 819physical properties, 216Radiolaria, 219scolecodonts, 829site survey, 210summary and conclusions, 220, 996

Site 331, Argentine Basin, 259background and objectives, 259biostratigraphy, 262diatoms, 262, 580lithology, 260nannofossils, 291physical properties, 262silicoflagellates, 707site survey and operations, 259summary and conclusions, 263

Sollasites falklandensis, new nannofossil species, 311thiersteini, new species, 311falklandensis Subzpηe, 286, 311

defined, 274

South Atlantic Basin, magnetic anomalies, 7Sphenolithus predistentus Zone (NP23), 746Stratigraphic hiatus, Turonian-Coniacian, 27

Cretaceous-Tertiary, 45Oxfordian-Aptian, 884, 886

Stylatractus circularis Zone, 98universus Zone, 98

Subantarctic surface water, 588Subbotinae angiporoides Zone, 96, 496Subsidence, Falkland Plateau, 35Systematic paleontology,

- archeomonàds, 690diatoms, 590foraminifera, 500, 541mollusca, 846Palynology, 817scolecodonts, 819silicoflagellates, 699

Tectonics, as related to sedimentation, 886Teichorhabdus, new nannofossil genus, 306

ethnos, new species, 306"Terminal Cretaceous Event," 36Tethyan foraminifera assemblage, 533Theocalyptra bicomis spongothorax Zone, 98Thermal history, organic matter in Mesozoic

sediments, 943Tholeiitic basalt, 7Tourmaline, 905Tranolithus orionatus Subzone, 307

define, 274Tribrachiatus orthostylus Zone, 38, 745Turbidity currents, 23Turonian-Coniacian stratigraphic hiatus, 27Underway geophysical observations, Leg 36, 945Veins, basic, 216Vekshinella (?) parma, new species, 307

stradnèri Zone, 288Vema Channel, 860Volcanic glass, 871

source of in Leg 36 material, 873X-ray diffractometer analyses, 42X-ray fluorescence analyses, 930X-ray mineralogy, 12Zoophycos, 34, 95, 149, 212

1079