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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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Southern Africa
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Namibia (1)
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Orange River (1)
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South Africa (2)
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West Africa
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Mauritania (1)
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Antarctica
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Asia
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Atlantic Ocean
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DSDP Site 504 (1)
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Oceania
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Pacific Ocean
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Southeast Pacific (2)
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Equatorial Pacific (3)
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North Pacific
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Bering Sea
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Northeast Pacific
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Gulf of California
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Northwest Pacific
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South Pacific
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West Pacific
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Ontong Java Plateau (2)
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Saint Helena (1)
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United States
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commodities
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carbon
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Pb-207/Pb-204 (1)
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Pb-208/Pb-204 (1)
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stable isotopes
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O-18/O-16 (4)
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Pb-207/Pb-204 (1)
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metals
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germanium (1)
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manganese (1)
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Invertebrata
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Gastropoda
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Protista
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Foraminifera
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Silicoflagellata (1)
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microfossils (39)
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Plantae
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thallophytes (7)
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geochronology methods
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Primary terms
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absolute age (5)
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Africa
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Southern Africa
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Namibia (1)
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Orange River (1)
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South Africa (2)
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West Africa
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Mauritania (1)
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Antarctica
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Larsen Ice Shelf (1)
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West Antarctica (1)
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Arctic Ocean
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Asia
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Transbaikalia (1)
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Atlantic Ocean
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Atlantis Massif (1)
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North Atlantic
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Atlantis fracture zone (1)
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Atlantis Massif (1)
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Barbados Ridge (2)
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Blake Plateau
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Blake Nose (1)
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Caribbean Sea (1)
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Exuma Sound (1)
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Great Bahama Bank (2)
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Gulf of Mexico (4)
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Hudson Strait (1)
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Labrador Sea (1)
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North Sea
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Viking Graben (1)
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-
Northeast Atlantic (3)
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Northwest Providence Channel (1)
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Reykjanes Ridge (1)
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Rockall Plateau (1)
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Rockall Trough (1)
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Straits of Florida (1)
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Tongue of the Ocean (1)
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South Atlantic
-
Falkland Plateau (1)
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Southeast Atlantic (1)
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Southwest Atlantic (1)
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Walvis Ridge (2)
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Atlantic Ocean Islands
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Ascension Island (1)
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Bouvet Island (1)
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Tristan da Cunha (1)
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Australasia
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Australia
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Western Australia (1)
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brines (1)
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Canada
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carbon
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C-14 (4)
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organic carbon (4)
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Caribbean region
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West Indies
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Antilles
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Lesser Antilles
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Barbados (1)
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-
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Bahamas (5)
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-
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Cenozoic
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Quaternary
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Holocene
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lower Holocene (1)
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Pleistocene
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middle Pleistocene (1)
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upper Pleistocene
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upper Quaternary
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Tertiary
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lower Tertiary (1)
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Neogene
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Miocene
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lower Miocene (1)
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middle Miocene (2)
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upper Miocene (1)
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Pliocene (5)
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Paleogene
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upper Eocene (1)
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Oligocene
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lower Oligocene (1)
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upper Oligocene (1)
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Paleocene
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lower Paleocene
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Danian (2)
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K-T boundary (2)
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Paleocene-Eocene Thermal Maximum (1)
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upper Tertiary (1)
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upper Cenozoic (1)
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Central America
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clay mineralogy (1)
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climate change (6)
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continental shelf (5)
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continental slope (5)
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crust (3)
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data processing (1)
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Deep Sea Drilling Project
-
IPOD
-
Leg 69
-
DSDP Site 505 (1)
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Leg 70 (1)
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Leg 73
-
DSDP Site 524 (1)
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-
Leg 74
-
DSDP Site 525 (1)
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DSDP Site 526 (1)
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DSDP Site 527 (1)
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DSDP Site 528 (1)
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DSDP Site 529 (1)
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Leg 75 (1)
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Leg 77
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DSDP Site 536 (1)
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DSDP Site 540 (1)
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Leg 78A
-
DSDP Site 541 (1)
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DSDP Site 542 (1)
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DSDP Site 543 (1)
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Leg 81
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DSDP Site 552 (1)
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DSDP Site 553 (1)
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-
Leg 83 (1)
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Leg 85
-
DSDP Site 575 (1)
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-
Leg 90
-
DSDP Site 590 (1)
-
-
Leg 92 (1)
-
Leg 94
-
DSDP Site 611 (1)
-
-
-
Leg 13
-
DSDP Site 125 (1)
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DSDP Site 132 (1)
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Leg 42A
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DSDP Site 372 (1)
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-
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deformation (1)
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diagenesis (19)
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economic geology (1)
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energy sources (1)
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Europe
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Southern Europe
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Italy
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-
-
-
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Western Europe
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Scandinavia
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Norway (2)
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faults (2)
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geophysical methods (15)
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glacial geology (3)
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heat flow (1)
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hydrology (1)
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ichnofossils (1)
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igneous rocks
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plutonic rocks
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ultramafics
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peridotites (1)
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-
-
volcanic rocks
-
basalts (5)
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pyroclastics
-
tuff (1)
-
-
-
-
Indian Ocean
-
Timor Sea
-
Timor Trough (1)
-
-
Wombat Plateau (1)
-
-
Integrated Ocean Drilling Program
-
Expedition 323
-
IODP Site U1339 (1)
-
IODP Site U1340 (1)
-
-
Expeditions 303/306
-
Expedition 303
-
IODP Site U1304 (1)
-
-
-
-
Invertebrata
-
Arthropoda
-
Mandibulata
-
Crustacea
-
Ostracoda (1)
-
-
-
-
Brachiopoda (1)
-
Bryozoa (1)
-
Echinodermata
-
Crinozoa
-
Crinoidea (1)
-
-
-
Mollusca
-
Cephalopoda
-
Coleoidea
-
Belemnoidea
-
Belemnitidae (1)
-
-
-
-
Gastropoda
-
Pteropoda (3)
-
-
-
Protista
-
Foraminifera
-
Rotaliina
-
Buliminacea
-
Bulimina (1)
-
-
Globigerinacea
-
Globigerinidae
-
Globigerina (1)
-
-
Globorotaliidae
-
Globorotalia
-
Globorotalia truncatulinoides (1)
-
-
-
-
-
-
Radiolaria (2)
-
Silicoflagellata (1)
-
-
-
isotopes
-
radioactive isotopes
-
C-14 (4)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
-
stable isotopes
-
Ca-44/Ca-40 (1)
-
O-18/O-16 (4)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
Sr-87/Sr-86 (3)
-
-
-
lava (2)
-
magmas (2)
-
mantle (1)
-
marine geology (2)
-
Mediterranean Sea
-
East Mediterranean
-
Black Sea (1)
-
Ionian Sea (1)
-
-
Mediterranean Ridge (1)
-
West Mediterranean
-
Alboran Sea (1)
-
Balearic Basin (1)
-
Tyrrhenian Sea (2)
-
-
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
Cenomanian (1)
-
K-T boundary (2)
-
Maestrichtian (2)
-
Senonian (2)
-
-
-
Jurassic (1)
-
-
metals
-
alkali metals
-
rubidium (1)
-
-
alkaline earth metals
-
calcium
-
Ca-44/Ca-40 (1)
-
-
magnesium (1)
-
strontium
-
Sr-87/Sr-86 (3)
-
-
-
germanium (1)
-
iron (1)
-
lead
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
-
manganese (1)
-
platinum group
-
iridium (1)
-
-
rare earths
-
cerium (1)
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-
-
metamorphism (1)
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metasomatism (2)
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Mexico
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Baja California (1)
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mud volcanoes (1)
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nodules (1)
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North America
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Gulf Coastal Plain (1)
-
-
ocean circulation (4)
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Ocean Drilling Program
-
Leg 101
-
ODP Site 632 (1)
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-
Leg 108
-
ODP Site 658 (1)
-
-
Leg 111 (1)
-
Leg 113
-
ODP Site 689 (1)
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ODP Site 690 (1)
-
-
Leg 120
-
ODP Site 747 (1)
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ODP Site 751 (1)
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-
Leg 121 (1)
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Leg 122
-
ODP Site 761 (1)
-
-
Leg 137 (1)
-
Leg 138
-
ODP Site 846 (1)
-
-
Leg 140 (1)
-
Leg 146
-
ODP Site 893 (1)
-
-
Leg 148 (1)
-
Leg 160
-
ODP Site 970 (1)
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ODP Site 971 (1)
-
-
Leg 166
-
ODP Site 1006 (1)
-
ODP Site 1007 (1)
-
-
Leg 171B
-
ODP Site 1049 (1)
-
-
Leg 178
-
ODP Site 1098 (1)
-
-
Leg 201
-
ODP Site 1226 (2)
-
-
-
ocean floors (7)
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Oceania
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Micronesia
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Mariana Islands (1)
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-
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oceanography (15)
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oil and gas fields (1)
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orogeny (1)
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oxygen
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O-18/O-16 (4)
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Pacific Ocean
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East Pacific
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Galapagos Rift (1)
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Northeast Pacific
-
Escanaba Trough (1)
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Gorda Rise (1)
-
Gulf of California
-
Guaymas Basin (2)
-
-
-
Southeast Pacific (2)
-
-
Equatorial Pacific (3)
-
North Pacific
-
Bering Sea
-
Bowers Ridge (1)
-
-
Northeast Pacific
-
Escanaba Trough (1)
-
Gorda Rise (1)
-
Gulf of California
-
Guaymas Basin (2)
-
-
-
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ooze
ABSTRACT Multisensor track measurements are a nondestructive method to produce continuously measured high-resolution physical property data sets that are a great asset to a wide range of research, including geotechnical studies and paleoceanography. Interpretation of these physical property data can be challenging because they are typically influenced by multiple variables. This paper specifically focuses on the interpretation of gamma-ray attenuation (GRA) data (a proxy for sediment bulk density) in biosiliceous sediments. The Bering Sea is a basin dominated by biosiliceous sediment, and the late Pleistocene to present core record of Sites U1340 and U1339, drilled during Integrated Ocean Drilling Program (IODP) Expedition 323, has subtle meter-scale changes in the concentration of fine-grained siliciclastic sediment that produce lithologic alternations between diatom ooze and diatom mud. We produced a detailed sedimentologic data set that combined smear slide petrography, scanning electron microscopy, and grain-size analysis for both Sites U1340 and U1339 and correlated it to shipboard GRA bulk density measurements. Results show that bulk density is negatively correlated with diatom abundance and positively correlated with the fragmentation of diatom valves. This study argues that diatom abundance and fragmentation influence sediment packing and drive down-core variability in GRA bulk density. Therefore, denser diatom mud is a result of tightly packed, highly fragmented diatom valves, and diatom ooze is a less dense sediment dominated by whole and less fragmented diatom valves. We suggest that GRA data can be used as a proxy for diatom abundance and an indicator of diatom fragmentation. We include a discussion of how these results may impact the interpretation of ancient bedded siliceous rocks.