Contributors:Jens Matthiessen, Ruediger Stein, Norbert R. Nowaczyk, Jochen Knies
Dinocyst taxa in the sedimentcores
... AMS 14C dates of sedimentcores used in this study
... Sedimentcores used in this study
... Location of sedimentcores at the Eurasian continental margin. The new cores used for dinocyst analysis are marked in bold. The arrows indicate schematically the path of the Atlantic layer in the Eastern Arctic Ocean (after Rudels et al., 1994). (YP: Yermak Plateau; FS: Fram Strait.)
... LateQuaternary... Relationship between magnetostratigraphy and stable oxygen and carbon isotope stratigraphy in selected sedimentcores from Fram Strait and Yermak Plateau. For sources of data, see Table 2. Only the late Saalian to Holocene section of core PS2212 is shown. The AMS 14C ages are in ka years BP. The Norwegian–Greenland Sea and Blake excursions in core PS2138 are inferred from the correlation of magnetic susceptibility record to core PS2212 (Nowaczyk and Knies, 2000). The correlation of isotope stages to terrestrial chronology is from Mangerud (1989). (ML: Mono Lake; LA: Laschamp; NGS: Norwegian–Greenland Sea; FS: Fram Strait; BL: Blake; H: Holocene; E: Eemian.)
Contributors:John W. King, John Peck, James M. Russell, Jonathan T. Overpeck, Christopher A. Scholz, Philip Y.O. Amoako, Keely Brooks
Seismic profile of Line 9 (N–S), illustrates well-defined deep-basin stratigraphy (i.e. Enlargement at bottom right). White reflections represent positive amplitudes. Sedimentcores are projected onto Line 9. Inset at upper left shows map view of seismic profile with horizontal dashes indicating area of well-defined stratigraphy. Dark gray area of inset indicates transition zone into acoustic turbidity. Lower left inset shows deep-basin multi-channel seismic line (from Scholz et al., 2002).
... Sedimentcores B2000-16P (∼56 m water depth), 12P (∼73 m), 15P (∼74 m), and 19P (∼44 m) consist predominantly of clays and silts. Black lines with arrows show tie lines used for correlation that were based on key horizons observed in both 12P and 15P. The inset shows the location of sedimentcores with respect to the N–S seismic line 9.
... Bathymetry of Lake Bosumtwi, Ghana (contour interval=10 m) with surrounding topography (elevation contour interval=150 m). Location of seismic profiles indicated by thick solid lines (numbered). Sedimentcore locations are indicated by solid circles. Drainage basin extent is designated with dashed line. Inset: Africa with major lake and river systems, and location of Lake Bosumtwi.
... Lake level over the past ∼110 ky, produced by combining results of this study (solid squares) with Talbot et al. (1984) and Maley (1991). The 60-m bpll lowstand is bracketed by radiocarbon ages (bar width); the true age may be up to 3000 years younger (see text for details). The older lowstands show one-sided error bars reflecting our estimates of sediment compaction.
List of levels sampled in core GC2 and for which the respective percentages of the sand and silt fractions were recovered. All levels are given a calibrated age obtained from the radiocarbon dates presented in Table 1 with sedimentation rates adjusted accordingly between dated horizons. Peak numbers of the sandy (aeolian) layers are listed nearest to the most prominent sandy level (shown in bold) with the respective standard deviation values given for all the adjacent (if present) sandy layers together
... Diagram to show the percentage of the sand-sized (top) and silt-sized (middle) particles recovered from Core GC2 against time in calibrated years BP. The seven aeolian peaks discussed in the text are labelled in the top diagram. The levels examined in the core (see Table 2) are represented by vertical bars in the middle diagram. The bottom diagram illustrates the change in sedimentation rate in the core and thus helps justify that the bottom portion of the core cannot be used to determine any evidence of cyclicity with certainty. Note that the sand peak younger than peak 1 was deposited during the marine transgression and is not used when discussing cyclic aeolian events in the lacustrine phase of Carpentaria.
... (A) Map of the Gulf of Carpentaria showing the location of core GC2 and (B) also the extent of Lake Carpentaria that would have existed during periods of low sea levels. (C) shows a stratigraphic log of core GC 2.
... List of samples from core GC-2 used for radiocarbon dating
... LateQuaternary... Diagram showing the calibrated ages of the mean heights for the seven peaks of aeolian particles [squares showing also error bars] recovered in core GC2. The correlation coefficient (r2=0.991) gives a re-occurrence of the peaks every ∼2,600 calibrated years. Superimposed on this are the timings of the three Heinrich events [HE 1–3] as well as the timing of the Younger Dryas [YD]. Note that the timing of the three HE does not coincide with the arid events recorded in Carpentaria, and also that LC aeolian peaks 4 and 3 coincide exactly with the onset (peak 4) and the end (peak 3) of the period of lowest sea level recorded from the tectonically-stable Bonaparte Gulf.
Contributors:A. Cascella, P. Petrosino, M. Vallefuoco, N. Pelosi, L. Capotondi, C. Lubritto, S. Tamburrino, F. Lirer, M. Sprovieri, L. Ferraro, D.D. Insinga
Table of the identified tephra layers. Layers are labelled and the relative position (cmcd) in the composite core is indicated. The label (V) Corresponds to the volcaniclastic layer recorded in core C836.
... Correlation of the three studied cores with the constructed composite core. All the recognised tephra layers are labelled from tS1 to tS4-α; volcaniclastic layer is labelled V. Magnetic susceptibility values for cores C90 and C836 are from Iorio et al. (2004), for core C90-1m is from Vallefuoco et al. (2012). Core lithology of cores C90 and C836 are from Iorio et al. (2004) modified while C90-1m, is from Vallefuoco et al. (2012).
... Integrated eco-biostratigraphic scheme plotted vs time. The ages for the identified climatic events top Younger Dryas (at 11.50 ka BP), top TC6 (at 11.90 ka BP) and Sapropel S1 (base at 10.800 ± 0.400 ka BP and top at 6.100 ± 0.500 ka BP) are from Björck et al. (1998), Cacho et al. (2001) and De Lange et al. (2008), respectively, while age for the top of Bölling-Allerod (13.421 ± 0.175 ka BP) is from this work. The ages for the Mesolithic, Neolithic, Eneolithic, Early Bronze age, Middle Bronze age, Late Bronze age, Early Iron age, Greek colonian-Etrurian and Roman archeological periods are from Roberts et al. (2011). The ages for the Medieval Optimum and the Little Ice Age (LIA) are from Perry and Hsu (2000). The arrows represent the position of the identified tephra layers with the ages according to this work and according to literature data.
... Location map of the study area. a) The black rectangle is the study area, while the black circle (core GNS84-C106), the black triangle (core BS7939) and the black star (ODP-Site 963) represent the study cores of Di Donato et al. (2008), Sbaffi et al. (2004) and of Sprovieri et al. (2003), respectively, and used for correlation; b) detailed location map of the studied cores in the Salerno Gulf (C90-1m; C90, C836).
... 14C-AMS radiocarbon data available for the composite core.
Contributors:Paulo César Fonseca Giannini, Dilce de Fátima Rossetti, Marcelo Cancela Lisboa Cohen, Luiz Carlos Ruiz Pessenda, Marlon Carlos França, Flávio L. Lorente, Kita Macario, Antônio Álvaro Buso Junior, Darcilea Castro
Stratigraphic description for core Li24 with lithological profile, pollen analysis and geochemical variables.
... Schematic representation of successive phases of sediment accumulation and vegetation change in the study area according to relative sea-level changes and sediment supply. (⋆ core locations).
... Radiocarbon dates of studied sedimentcores.
... Topographic correlation among the facies associations identified in the studied cores.
... a) Location of the study area and its geological context. b) SRTM-DEM topography of the study site and lithostratigraphic profiles. c) Location of studied sedimentcores and the spatial distribution of main geomorphological features.
Contributors:Ralph Klöcker, Dick Kroon, Rüdiger Henrich, Gerald Ganssen, Simon J.A. Jung
Pteropod shell preservation (LDX) in relation to the δ18O N. dutertrei record (Ivanochko et al., 2005) in core 905 off Somalia. Preservation spikes (low LDX values) occur during glacials and stadials.
... Comparison between carbonate dissolution proxies from different sites in the Indian Ocean. a) total abundance of pteropods per g of core KL15 (1631 m water depth; Almogi-Labin et al., 2000) from the Gulf of Aden; b) Composite Dissolution Index of core V34–53 (3812 m water depth) from the Ninety-East Ridge (after Peterson and Prell, 1985), higher values indicate better preservation; c) foraminiferal fragmentation index (fragments/(fragments+whole)) of core RC27–61 (1893 m water depth) from the Owen Ridge, northwestern Arabian Sea (after Murray and Prell, 1992); d) atmospheric CO2 concentrations from the Vostok ice core (after Petit et al., 1999), scale reversed for better comparison with the preservation records; e) relative abundance of whole pteropods (>125 μm) of core 905 off Somalia.
... Relative abundance of whole pteropods, whole pteropods including fragments in the coarse fraction (> 125 μm) in relation to the Corg content (Ivanochko et al., 2005) in core 905 off Somalia. Different pteropod preservation intervals are indicated by roman numbers.
... LateQuaternary... List of pteropod species found in the samples of core 905; + = abundant; ++ = common; − = rare; −− = very rare.
... Map showing the location of piston core 905 off Somalia.
Contributors:Pratima M. Kessarkar, A. Anil Kumar, M. Thamban, S.K. Patil, V. Purnachandra Rao
(A) Down-core variations of Magnetic susceptibility (MS) and different sedimentological properties (acid-insoluble residue — AIR, CaCO3, organic carbon, median size, sand content) of the sediments in GC1. (B) Down-core variations of sedimentological parameters, δ18O of the Globigerinoides ruber and rock magnetic properties in GC2. Arrows in the figure show changing sedimentary conditions after 16 ka. (C) X-ray diffractograms of the core GC2; Sm — smectite, Pa — palygorskite, I — illite, K — kaolinite and Ch — chlorite.
... Down-core variations of MS in GC11.
... Down-core variations of MS in core GC14 and GC15.
... (A) Down-core variations of MS and different sedimentological parameters in GC3, GC4 and GC6. (B) Down-core variations of different sedimentological parameters and rock magnetic properties in GC5.
... Details of radiocarbon analyses on different sediment sections of the cores
... lateQuaternary... sediments
Contributors:George Th. Chronis, Vasilios Lykousis, Aristomenis P. Karageorgis
Simplified sedimentcore description and AMS 14C dates (yr BP) of Units A, B and C. For core locations see Fig. 1.
... sediment fluxes... Study area location map and simplified bathymetry (depth contours in meters). Seismic reflection (3.5 kHz) tracks are indicated by solid and dashed lines and sedimentcores by open and solid circles. Radiocarbon analysis was performed in the cores TH-46 and TH-48. Geotechnical properties were measured along the cores indicated by open circles (used for this study). The North Aegean Trough (NAT) is also indicated (inset map).
... Sediment units characteristics, loads, and fluxes
... Sediment thickness maps (m) of Unit A (a), Unit B (b), and Unit C (c).
... LateQuaternary... Vertical distribution of water content, wet density and shear strength in seven representative sedimentcores from the Thermaikos Gulf shelf and slope and the Sporades Basin.
Alluvial sediments... 87Sr/86Sr and 143Nd/144Nd ratios in the silicate fraction of GS coresediments.
... δ13C (‰ VPDB) of bulk sediment organic matter from GS-10 and GS-11 cores.
... δ18O and δ13C of carbonate nodules from GS cores. Also given are sampling depths of host sediments containing the nodules.
... A–CN–K ternary plot (Nesbitt and Young, 1982) showing composition of GS-10 and GS-11 coresediments. Also shown for comparison are modern-river sediments from Himalaya (same as in Fig. 3), average values for world river sediments (Li and Yang, 2010), UCC, and PAAS.
... Temporal variations in (a and b) 87Sr/86Sr and εNd in GS coresediments; (c and d) δ18O and δ13C of carbonate nodules from GS cores; (e) δ13C of soil organic matter from GS cores; (f) Modeled record of change in the strength of SW Indian Monsoon from Prell and Kutzbach (1987); and (g) δ18O ice core record from the Guliya ice cap, Qinghai–Tibetan Plateau (Thompson et al., 1997). Also shown for comparison are 87Sr/86Sr and εNd in sediments (in a and b; Rahaman et al., 2009), and δ18O and δ13C values of carbonate nodules (in c and d; Rahaman et al., 2011) in a ~50m core from the Ganga interfluves.