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  • 1
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    (Table 2) Quartz/(Opal-CT x 8) ratios, quartz crystallinity, opal-CT d-spacings, and opal-CT crystallite sizes across a single calcareous porcellanite chert bed at DSDP Hole 69-504A
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: -; 69-504A; Calculated, see reference(s); Deep Sea Drilling Project; Description; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; d-spacing; Glomar Challenger; Identification; Leg69; Ratio; Sample code/label; see reference(s)
    Type: Dataset
    Format: text/tab-separated-values, 40 data points
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  • 2
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    (Table 1) Characteristics of DSDP Site 69-504 late Miocene siliceous rocks and associated rocks
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: -; 69-504; 69-504A; 69-504B; Calculated, see reference(s); Crystallinity; Deep Sea Drilling Project; DEPTH, sediment/rock; Description; Description 2 (continued); DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; d-spacing; Elevation of event; Event label; Glomar Challenger; Identification; Latitude of event; Leg69; Lithology/composition/facies; Longitude of event; Minerals; Point counting with SEM/EDAX; Ratio; Sample code/label; see reference(s)
    Type: Dataset
    Format: text/tab-separated-values, 353 data points
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  • 3
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    (Table 3) Geochemistry at DSDP Site 69-504
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 69-504; 69-504A; 69-504B; Aluminium oxide; Barium; Boron; Calcium oxide; Chromium; Cobalt; Comment; Copper; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Glomar Challenger; Iron oxide, Fe2O3; Iron oxide, FeO; Latitude of event; Leg69; Lithology/composition/facies; Longitude of event; Loss on ignition; Magnesium oxide; Manganese; Nickel; Phosphorus pentoxide; Potassium oxide; Quantitative emission spectral analysis; Sample code/label; see reference(s); Silicon dioxide; Silver; Sodium oxide; Strontium; Titanium dioxide; Total; Vanadium; X-ray spectrometry; Yttrium; Zinc; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 526 data points
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  • 4
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    Stable oxygen isotope ratios, calcium carbonate and opal content in late Pliocene sediments of DSDP Hole 75-532 in the Southeast Atlantic (Table 1)
    PANGAEA
    In:  Supplement to: Sancetta, Constance A; Heusser, Linda E; Hall, Michael A (1992): Late Pliocene climate in the Southeast Atlantic: Preliminary results from a multi-disciplinary study of DSDP Site 532. Marine Micropaleontology, 20(1), 59-75, https://doi.org/10.1016/0377-8398(92)90009-9
    Details
    Publication Date: 2023-06-27
    Description: Site 532 on the Walvis Ridge was sampled at 4000- to 800-year intervals from 2.24 to 2.60 Ma, spanning the three large glacial advances of the late Pliocene. An age model was created by correlating the oxygen isotope record to Site 607 with linear interpolations between tie-lines. The resultant age model differs from that in the site reports by more than 800,000 years, due to misidentification of a magnetic boundary. Sedimentation rates varied by an order of magnitude at this site, with minimum accumulation during glacial events. Interglacial intervals were charactrized by high marine production and high summer precipitation on land, while glacials had very low production and arid continental climate. During the large glacial events (Stages 96-100) conditions of low production and continental aridity reached their greatest intensity, but there is no evidence of a permanent mode shift in either marine or terrestrial records. Calcite concentration has a strong variation at obliquity frequencies, with maxima during interglacials, but occasionally shows a large amplitude at precessional frequencies as well, so that high concentrations occur in a few glacial intervals. As a result, color variation is not a reliable guide to glacial-scale cycles at this site. Composition of the phytoplankton assemblage is diverse and highly variable, and we have not been able to distinguish a clear indicator of upwelling-related production. Spectral analysis reveals obliquity and precessional signals in the pollen data, while several diatom records contain combination tones, indicating that these data represent a complicated response to both local and high-latitude forcing.
    Keywords: 75-532; AGE; Calcium carbonate; Carbonate bomb (Müller & Gastner, 1971); Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Isotope ratio mass spectrometry; Leg75; Opal, biogenic silica; Opal, extraction; Mortlock & Froelich, 1989; South Atlantic; Uvigerina spp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 702 data points
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  • 5
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    Petrology and geochemistry of silicified upper Miocene chalk at DSDP Site 69-504
    PANGAEA
    In:  Supplement to: Hein, James R; Sancetta, Constance A; Morgenson, Lisa A (1983): Petrology and geochemistry of silicified upper Miocene chalk, Costa Rica Rift, Deep Sea Drilling Project Leg 69. In: Cann, JR; Langseth, MG; Honnorez, J; Von Herzen, RP; White, SM; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 69, 395-422, https://doi.org/10.2973/dsdp.proc.69.116.1983
    Details
    Publication Date: 2023-06-27
    Description: Chert, Porcellanite, and other silicified rocks formed in response to high heat flow in the lower 50 meters of 275 meters of sediments at Deep Sea Drilling Project Site 504, Costa Rica Rift. Chert and Porcellanite partly or completely replaced upper Miocene chalk and limestone. Silicified rock occurs as nodules, laminae, stringers, and casts of burrows, and consists of quartz and opal-CT in varying amounts, associated with secondary calcite. The secondary silica was derived from dissolution of opal-A (biogenic silica), mostly diatom frustules and radiolarian tests. Temperature data obtained at the site indicate that transformation of opal-A to opal-CT began at about 50°C, and transformation from opal-CT to quartz at about 55°C. Quartz is most abundant close to basement basalts. These silica transformations occurred over the past 1 m.y., and took place so rapidly that there was incomplete ordering of opal-CT before transformation to quartz; opal-CT formed initially with an uncommonly wide d spacing. Quartz shows poor crystallinity. Chemical data show that the extensively silicified rocks consist of over 96% SiO2; in these rocks, minor and trace elements decreased greatly, except for boron, which increased. Low Al2O3 and TiO2 contents in all studied rocks preclude the presence of significant volcanic or terrigenous detritus. Mn content increases with depth, perhaps reflecting contributions from basalts or hydrothermal solutions. Comparisons with cherts from oceanic plateaus in the central Pacific point to a more purely biogenic host sediment for the Costa Rica Rift cherts, more rapid precipitation of quartz, and formation nearer a spreading center. Despite being closer to continental sources of ash and terrigenous detritus, Costa Rica Rift cherts have lower Al2O3, Fe2O3, and Mn concentrations.
    Keywords: 69-504; 69-504A; 69-504B; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg69
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 6
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    Age model and sedimentation rate of sediment core V21-172 (1997)
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    Details
    Publication Date: 2023-06-27
    Keywords: Age model; Calculated; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; Sedimentation rate; V21; V21-172; Vema
    Type: Dataset
    Format: text/tab-separated-values, 5 data points
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  • 7
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    Age model of Hole 86-580 (1997)
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    Details
    Publication Date: 2023-06-27
    Keywords: 86-580; Age model; Calculated; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Event label; Glomar Challenger; Lamont-Doherty Earth Observatory, Columbia University; LDEO; Leg86; North Pacific; Sedimentation rate
    Type: Dataset
    Format: text/tab-separated-values, 9 data points
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  • 8
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    Age model of sediment core RC10-216
    PANGAEA
    In:  Supplement to: Sancetta, Constance A; Silvestri, Shaymaria (1984): Diatom stratigraphy of the late Pleistocene (Brunhes) subarctic Pacific. Marine Micropaleontology, 9(3), 263-274, https://doi.org/10.1016/0377-8398(84)90016-1
    Details
    Publication Date: 2023-06-27
    Description: Three piston cores in the subarctic region of the North Pacific show consistent changes in relative abundance of diatom species throughout the Brunhes magnetic epoch. These events can be used both as stratigraphic markers to subdivide the interval and as indicators of oceanographic conditions. The stratigraphic record shows an acme for A. ochotensis from about 625-350 Kyr (Isotope Stages 15-10); a marked increase in amplitude of abundance fluctuations for R. hebetata 300-0 Kyr (Stages 8-1), the extinction of R. curvirostris at 276 Kyr (Stage 8), and abundance fluctuations of D. seminae roughly in phase with the global oxygen isotope record from 450-0 Kyr (Stages 12-1). In the subarctic Pacific, an abrupt change in species abundance is not a reliable indicator of hiatus occurrence. Although details are not clear, there appears to have been a fundamental change of the subarctic gyre during the middle Brunhes (Stages 10-8 time), with more intense glacial intervals and stronger glacial-interglacial contrast occurring after that time. Coarse clastic detritus is not restricted to glacial intervals, suggesting that ice-rafting has occurred throughout the Brunhes interval; peak levels of ice-rafting may occur during ice-growth and decay, as well as during short intervals within a stage.
    Keywords: Age model; Calculated; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; RC10; RC10-216; Robert Conrad; Sedimentation rate
    Type: Dataset
    Format: text/tab-separated-values, 3 data points
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  • 9
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    Diatom abundance in surface sediments of the northern North Pacific (2014)
    PANGAEA
    In:  Supplement to: Ren, Jian; Gersonde, Rainer; Esper, Oliver; Sancetta, Constance A (2014): Diatom distributions in northern North Pacific surface sediments and their relationship to modern environmental variables. Palaeogeography, Palaeoclimatology, Palaeoecology, 402, 81-103, https://doi.org/10.1016/j.palaeo.2014.03.008
    Details
    Publication Date: 2023-07-09
    Description: In order to map the modern distribution of diatoms and to establish a reliable reference data set for paleoenvironmental reconstruction in the northern North Pacific, a new data set including the relative abundance of diatom species preserved in a total of 422 surface sediments was generated, which covers a broad range of environmental variables characteristic of the subarctic North Pacific, the Sea of Okhotsk and the Bering Sea between 30° and 70°N. The biogeographic distribution patterns as well as the preferences in sea surface temperature of 38 diatom species and species groups are documented. A Q-mode factor analysis yields a three-factor model representing assemblages associated with the Arctic, Subarctic and Subtropical water mass, indicating a close relationship between the diatom composition and the sea surface temperatures. The relative abundance pattern of 38 diatom species and species groups was statistically compared with nine environmental variables, i.e. the summer sea surface temperature and salinity, annual surface nutrient concentration (nitrate, phosphate, silicate), summer and winter mixed layer depth and summer and winter sea ice concentrations. Canonical Correspondence Analysis (CCA) indicates 32 species and species groups have strong correspondence with the pattern of summer sea surface temperature. In addition, the total diatom flux data compiled from ten sediment traps reveal that the seasonal signals preserved in the surface sediments are mostly from spring through autumn. This close relationship between diatom composition and the summer sea surface temperature will be useful in deriving a transfer function in the subarctic North Pacific for the quantitative paleoceanographic and paleoenvironmental studies. The relative abundance of the sea-ice indicator diatoms Fragilariopsis cylindrus and F. oceanica of 〉20% in the diatom composition is used to represent the winter sea ice edge in the Bering Sea. The northern boundary of the distribution of F. doliolus in the open ocean is suggested to be an indicator of the Subarctic Front, while the abundance of Chaetoceros resting spores may indicate iron input from nearby continents and shelves and induced productivity events in the study area.
    Keywords: 2172; 2176; 2177; 2182; 2185; 2217; 2219; 2220; 2223; 2227; 2228; 2252; 2254; 2256; 2259; 2262; 2266; Academy of Science Rise; Achnanthes lanceolata; Achnanthes minutissima; Achnanthes spp.; Actinocyclus cf. octonarius; Actinocyclus curvatulus; Actinocyclus ochotensis; Actinocyclus octonarius; Actinocyclus oculatus; Actinocyclus sp.; Actinocyclus spp.; Actinoptychus senarius; Actinoptychus splendens; Actinoptychus vulgaris; Akademik A Nesmeyanov; Akademik M.A. Lavrentiev; Alveus marinus; Amphora spp.; Asteromphalus brookei; Asteromphalus hyalinus; Asteromphalus marylandicus; Asteromphalus robustus; Aulacoseira granulata; Aulacoseira spp.; AWI_Paleo; Azpeitia nodulifer; Azpeitia tabularis; Bacillaria paxillifer; Bacterosira bathyomphala; BB311-017; BB311-026; BB311-039; Bering Sea; Chaetoceros, resting spores; Chaetoceros atlanticus; Chaetoceros diadema, resting spores; Chaetoceros furcellatus; Cocconeis californica; Cocconeis costata; Cocconeis pellucida; Cocconeis placentula; Cocconeis scutellum; Cocconeis spp.; Coscinodiscus marginatus; Coscinodiscus oculus-iridis; Coscinodiscus radiatus; Counting, diatoms; CTD/Rosette; CTD-RO; Cyclotella litoralis; Cyclotella ocellata; Cyclotella spp.; Cyclotella striata; Cymbella spp.; Delphineis kippae; Delphineis spp.; Delphineis surirella; Denticula spp.; DEPTH, sediment/rock; Derugin Basin; Detonula confervacea, resting spores; Diatoma spp.; Diploneis bombus; Diploneis chersonensis; Diploneis litoralis; Diploneis smithii; Diploneis spp.; Eastern continental slope of Sakhalin; Eastern slope of Kurile Basin; Elevation of event; Entomoneis spp.; Eunotia curtagrunowii; Eunotia monodon; Eunotia spp.; Event label; Fallacia spp.; Fossula arctica; Fragilaria capucina; Fragilaria construens; Fragilaria martyi; Fragilaria spp.; Fragilariopsis atlantica; Fragilariopsis cf. oceanica; Fragilariopsis cylindrus; Fragilariopsis doliolus; Fragilariopsis oceanica; Fragilariopsis reginae-jahniae; Fragilariopsis spp.; GC; GE99/KOMEX_VI; GE99-10-2; GE99-1-2; GE99-12-3; GE99-1-3; GE99-2-2; GE99-38-3; GE99-4-3; GE99-5-1; GE99-5-2; GE99-6-2; GE99-6-3; Gomphonema spp.; Gramatophora angulosa; Gravity corer; Gulf of Alaska; Gyrosigma spp.; Hemidiscus cuneiformis; INOPEX; KAL; KALMAR II; Kashevarov Trough; Kasten corer; KOMEX; KOMEX I; KOMEX II; Kommandorsky Basin; Kronotsky Peninsula; Kurile Basin; La Perusa (Soya) Strait; Latitude of event; Licmophora spp.; Longitude of event; LV27/GREGORY; LV27-11-3; LV27-1-2; LV27-12-2; LV27-2-2; LV27-3-2; LV27-4-2; LV27-5-5; LV27-6-2; LV27-7-2; LV27-8-2; LV28; LV28-2-2; LV28-34-1; LV28-40-3; LV28-41-3; LV28-42-3; LV28-4-3; LV28-43-3; LV28-44-2; LV28-61-3; LV28-64-3; LV29-103-1; LV29-104-1; LV29-108-1; LV29-110-1; LV29-112-1; LV29-114-1; LV29-116-3; LV29-123-4; LV29-131-1; LV29-2; LV29-69-1; LV29-72-1; LV29-94-1; Marshal Gelovany; Meji Seamount; Melosira sol; MIC; MiniCorer; MSN; MUC; MultiCorer; Multicorer with television; Multiple opening/closing net; Navicula directa; Navicula kariana var. detersa; Navicula spp.; Navicula vulpina; Neodenticula cf. seminae; Neodenticula seminae; Nitzschia bicapitata; Nitzschia braarudii; Nitzschia delicatissima; Nitzschia kolaczeckii; Nitzschia pellucida; Nitzschia sicula; Nitzschia spp.; North Pacific Ocean; North-West Kurile basin slope; Odontella aurita; OK92; OK92_2172; OK92_2176; OK92_2177; OK92_2182; OK92_2185; OK92_2217; OK92_2219; OK92_2220; OK92_2223; OK92_2227; OK92_2228; OK92_2252; OK92_2254; OK92_2256; OK92_2259; OK92_2262; OK92_2266; Opephora spp.; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Paralia sulcata; Pauliella taeniata; Pleurosigma spp.; Porosira glacialis; Pos37B-04G; Pos37B-13G; Pos37B-19G; Pos37B-20G; Pos37B-21G; Pos37B-27G; Pos37B-28G; Pos37B-31G; Pos37B-35G; Pos37B-36G; Pos37B-39C(G); Pos37B-43C; Pos37B-47C; Pos37B-59G; Pos37B-62G; Proboscia subarctica; Pseudogomphonema kamtschaticum; Pseudogomphonema spp.; Pseudo-nitzschia seriata forma obtusa; Rhaphoneis amphiceros; Rhizosolenia bergonii; Rhizosolenia hebetata forma hebetata; Rhizosolenia hebetata forma semispina; Rhizosolenia setigera; Rhizosolenia spp.; Rhizosolenia styliformis; Roperia tesselata; Sakhalin shelf; Sakhalin shelf and slope; Sea of Okhotsk; Shirshov Ridge; SO178; SO178-10-4; SO178-11-4; SO178-12-4; SO178-1-3; SO178-13-3; SO178-14-4; SO178-22-1; SO178-29-1; SO178-3-3; SO178-58-1; SO178-72-1; SO178-78-3; SO178-86-3; SO178-9-3; SO201/2; SO201-2-08; SO201-2-11; SO201-2-113; SO201-2-126; SO201-2-13; SO201-2-68; SO201-2-76; SO201-2-79; SO201-2-83; SO201-2-90; SO201-2-99; SO202/1; SO202/1_01-3; SO202/1_02-4; SO202/1_03-4; SO202/1_04-3; SO202/1_05-3; SO202/1_06-2; SO202/1_07-2; SO202/1_08-1; SO202/1_09-2; SO202/1_10-2; SO202/1_11-1; SO202/1_12-2; SO202/1_13-4; SO202/1_14-5; SO202/1_15-4; SO202/1_18-1; SO202/1_19-5; SO202/1_21-2; SO202/1_22-1; SO202/1_23-4; SO202/1_24-2; SO202/1_25-1; SO202/1_28-1; SO202/1_29-5; SO202/1_31-5; SO202/1_32-5; SO202/1_33-5; SO202/1_34-4; SO202/1_36-6; SO202/1_37-1; SO202/1_38-1; SO202/1_39-2; SO202/1_40-2; SO202/1_41-3; SO202/1_42-3; SO202/1_45-2; Sonne; Southwestern Kamchatka slope; Stellarima stellaris; Stephanodiscus rotula forma minutula; Stephanopyxis turris; SU453-002; SU453-005; SU453-008; SU453-015; Tabularia investiens; Tabularia tabulata; Terpenia bay; Thalassionema nitzschioides; Thalassionema nitzschioides var. lanceolata; Thalassionema nitzschioides var. parva; Thalassiosira angulata; Thalassiosira antarctica var. borealis; Thalassiosira antarctica var. borealis, resting spores; Thalassiosira bioculata; Thalassiosira bulbosa; Thalassiosira constricta, resting spores; Thalassiosira eccentrica; Thalassiosira hyalina; Thalassiosira hyperborea; Thalassiosira leptopus; Thalassiosira lineata; Thalassiosira nordenskioeldii; Thalassiosira oestrupii; Thalassiosira pacifica; Thalassiosira rotula; Thalassiosira sp.; Thalassiosira spp.; Thalassiosira trifulta; Thalassiothrix longissima; TT031-009-011; TT039-018; TT042-AC288; TT042-AC290; TT042-AC294; TT042-AC306; TT053-AC007; TVMUC; W7605B; W7605B-09; W7905A; W7905A-111; W7905A-156; W7905A-160; W8508AA; W8508AA-09; W8809A; W8809A-13GC; W8809A-4GC; W9009A-22BC; Wecoma; West Kurile basin; West Kurile basin slope; Y70-3; Y70-3-48GRAV; Yaquina
    Type: Dataset
    Format: text/tab-separated-values, 22260 data points
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  • 10
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    Diatom abundance of Hole 68-503A (2005)
    PANGAEA
    Details
    Publication Date: 2023-07-10
    Keywords: 68-503A; Abundance estimate; Asterolampra acutiloba; Coscinodiscus paleaceus; Coscinodiscus praepaleaceus; Deep Sea Drilling Project; DEPTH, sediment/rock; Diatom abundance; Dictyocha neonautica; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Leg68; Mesocena quadrangula; Nitzschia cylindrica; Nitzschia fossilis; Nitzschia jouseae; Nitzschia miocenica; Nitzschia porteri; Nitzschia reinholdii; North Pacific/FLANK; Preservation; Pseudoeunotia doliolus; Rhizosolenia matuyamai; Rhizosolenia praebergonii praebergonii; Rhizosolenia praebergonii robusta; Sample code/label; Thalassiosira convexa; Thalassiosira convexa aspinosa; Thalassiosira praeconvexa; Thalassiothrix miocenica
    Type: Dataset
    Format: text/tab-separated-values, 935 data points
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