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  • 1
    Electronic Resource
    Electronic Resource
    A new date for Ramapithecus (1979)
    [s.l.] : Nature Publishing Group
    Nature 282 (1979), S. 399-401 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Column A, VGP latitudes calculated from site means of the Ratha Kas section1. Class A, B and C data (see text) are denoted by circles, triangles and diamonds respectively. Column B, Block diagram of section in (A), black is normal polarity, white is reversed. Magnetozones D and H stand for ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/282399a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Estimating the error of age interpolation in sedimentary rocks (1986)
    [s.l.] : Nature Publishing Group
    Nature 319 (1986), S. 139-141 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The assignment of absolute age estimates to sedimentary rocks requires either horizons susceptible to radiometric dating or access to the geomagnetic reversal timescale (CRTS). Fossils may indicate relative chronology in sedimentary rocks but do not convey information about absolute age. Thus, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/319139a0
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  • 3
    Electronic Resource
    Electronic Resource
    Age interpolation (reply) (1986)
    [s.l.] : Nature Publishing Group
    Nature 323 (1986), S. 471-472 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Stratigraphers often find it useful to estimate the age of a datum that lies between levels of known age. In the absence of other information, no age estimate is better than the linear interpolant. Moreover, regardless of one's theory of how sediment accumulates, the best guide to the uncertainty ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/323471b0
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  • 4
    Electronic Resource
    Electronic Resource
    Age of the Plio-Pleistocene boundary in the Vrica section, southern Italy (1983)
    [s.l.] : Nature Publishing Group
    Nature 304 (1983), S. 125-129 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] New palaeomagnetic data from the proposed Plio-Pleistocene boundary stratotype section (Vrica section, southern Italy) are presented here in order to improve the correlation of these sediments to the magnetic polarity time scale. If the interpretation preferred here is correct, the boundary falls ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/304125a0
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  • 5
    Electronic Resource
    Electronic Resource
    Quantitative nannofossil correlation to open ocean deep-sea sections from Plio-Pleistocene boundary at Vrica, Italy (1983)
    [s.l.] : Nature Publishing Group
    Nature 304 (1983), S. 156-158 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] At the International Geological Congress held in London in 1948, a resolution was passed5 that the Plio-Pleistocene boundary should be placed at the base of the Calabrian Stage marine strata in Italy, at the first indication of cooling and the immigration of coldwater indicators such as Hyalinea ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/304156a0
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  • 6
    Electronic Resource
    Electronic Resource
    Acquisition of chemical remanent magnetization by synthetic iron oxide (1987)
    [s.l.] : Nature Publishing Group
    Nature 327 (1987), S. 610-612 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Previous experiments on the directional properties of CRM produced by the direct precipitation of a magnetic mineral from solution have been inconclusive3"7. Chemical remanence produced by the alteration of a magnetic parent mineral may be parallel to the field during alteration7'8, may be parallel ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/327610a0
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  • 7
    Electronic Resource
    Electronic Resource
    Geomagnetic palaeointensities during the Cretaceous normal superchron measured using submarine basaltic glass (1993)
    [s.l.] : Nature Publishing Group
    Nature 366 (1993), S. 238-242 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] High-quality palaeointensity data have been obtained from Thellier-Thellier experiments on recent and Cretaceous submarine basaltic glasses. Whereas the recent samples faithfully yield today's geomagnetic intensity at the site, the palaeointensities for the beginning and end of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/366238a0
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  • 8
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    Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years (2022)
    Nature Research
    Details
    Publication Date: 2024-02-07
    Description: The Southern Ocean paleoceanography provides key insights into how iron fertilization and oceanic productivity developed through Pleistocene ice-ages and their role in influencing the carbon cycle. We report a high-resolution record of dust deposition and ocean productivity for the Antarctic Zone, close to the main dust source, Patagonia. Our deep-ocean records cover the last 1.5 Ma, thus doubling that from Antarctic ice-cores. We find a 5 to 15-fold increase in dust deposition during glacials and a 2 to 5-fold increase in biogenic silica deposition, reflecting higher ocean productivity during interglacials. This antiphasing persisted throughout the last 25 glacial cycles. Dust deposition became more pronounced across the Mid-Pleistocene Transition (MPT) in the Southern Hemisphere, with an abrupt shift suggesting more severe glaciations since ~0.9 Ma. Productivity was intermediate pre-MPT, lowest during the MPT and highest since 0.4 Ma. Generally, glacials experienced extended sea-ice cover, reduced bottom-water export and Weddell Gyre dynamics, which helped lower atmospheric CO2 levels.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
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  • 9
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    Ancient marine sediment DNA reveals diatom transition in Antarctica (2022)
    Nature Research
    Details
    Publication Date: 2024-02-07
    Description: Antarctica is one of the most vulnerable regions to climate change on Earth and studying the past and present responses of this polar marine ecosystem to environmental change is a matter of urgency. Sedimentary ancient DNA (sedaDNA) analysis can provide such insights into past ecosystem-wide changes. Here we present authenticated (through extensive contamination control and sedaDNA damage analysis) metagenomic marine eukaryote sedaDNA from the Scotia Sea region acquired during IODP Expedition 382. We also provide a marine eukaryote sedaDNA record of ~1 Mio. years and diatom and chlorophyte sedaDNA dating back to ~540 ka (using taxonomic marker genes SSU, LSU, psbO). We find evidence of warm phases being associated with high relative diatom abundance, and a marked transition from diatoms comprising 〈10% of all eukaryotes prior to ~14.5 ka, to ~50% after this time, i.e., following Meltwater Pulse 1A, alongside a composition change from sea-ice to open-ocean species. Our study demonstrates that sedaDNA tools can be expanded to hundreds of thousands of years, opening the pathway to the study of ecosystem-wide marine shifts and paleo-productivity phases throughout multiple glacial-interglacial cycles.
    Type: Article , PeerReviewed
    Format: text
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  • 10
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    An archaeomagnetic study of the Ishtar Gate, Babylon (2024)
    PLOS
    Details
    Publication Date: 2024-01-23
    Description: Data from the marriage of paleomagnetism and archaeology (archaeomagnetism) are the backbone of attempts to create geomagnetic field models for ancient times. Paleointensity experimental design has been the focus of intensive efforts and the requirements and shortcomings are increasingly well understood. Some archaeological materials have excellent age control from inscriptions, which can be tied to a given decade or even a specific year in some cases. In this study, we analyzed fired mud bricks used for the construction of the Ishtar Gate, the entrance complex to the ancient city of Babylon in Southern Mesopotamia. We were able to extract reliable intensity data from all three phases of the gate, the earliest of which includes bricks inscribed with the name of King Nebuchadnezzar II (605 to 562 BCE). These results (1) add high quality intensity data to a region relatively unexplored so far (Southern Mesopotamia), (2) contribute to a better understanding of paleosecular variation in this region, and the development of an archaeomagnetic dating reference for one of the key regions in the history of human civilizations; (3) demonstrate the potential of inscribed bricks (glazed and unglazed), a common material in ancient Mesopotamia, to archaeomagnetic studies; and (4) suggest that the gate complex was constructed some time after the Babylonian conquest of Jerusalem, and that there were no substantial chronological gaps in the construction of each consecutive phase. The best fit of our data (averaging 136±2.1 ZAm2) with those of the reference curve (the Levantine Archaeomagnetic Curve) is 569 BCE.
    Description: Published
    Description: e0293014
    Description: OSA1: Variazioni del campo magnetico terrestre, imaging crostale e sicurezza del territorio
    Description: JCR Journal
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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