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  • Continental drift.  (1)
  • Tridacna  (1)
  • 2020-2024  (2)
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  • 2020-2024  (2)
Year
  • 1
    Online Resource
    Online Resource
    San Diego :Elsevier,
    Keywords: Continental drift. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (664 pages)
    Edition: 1st ed.
    ISBN: 9780128185346
    DDC: 551.136
    Language: English
    Note: Front Cover -- Ancient Supercontinents and the Paleogeography of Earth -- Copyright Page -- Contents -- List of contributors -- About the editors -- Preface -- Acknowledgments -- 1 Precambrian supercontinents and supercycles-an overview -- 1.1 The history of the supercontinent research-the five milestones -- 1.2 The Earth and the solar system -- 1.3 Some tectonic concepts -- 1.4 Precambrian supercontinents and their cyclicity-observational evidence -- 1.5 How to reconstruct Precambrian terranes? -- 1.6 Models of the Precambrian supercontinents-some remarks -- 1.7 Precambrian paleomagnetism and paleogeography: a guideline -- 1.7.1 Target rocks -- 1.7.2 Steps 1 and 2 -- 1.7.3 Steps 3−6 -- 1.7.4 Step 7 -- 1.7.5 Step 8 -- 1.8 Precambrian paleomagnetism applied to paleoreconstructions-an example -- 1.8.1 Example 1: closest approach technique for reconstructions -- 1.8.2 Matching apparent polar wander paths-another technique for reconstructions -- 1.9 Precambrian paleomagnetic databases -- 1.9.1 Precambrian pole distributions -- 1.9.2 Some aspects of Precambrian paleomagnetic data -- 1.10 Global and terrane geological maps for reconstructions -- 1.11 Precambrian supercontinent cycle -- 1.11.1 The Precambrian supercontinents and supercycles -- 1.11.2 Secular evolution trends during the Precambrian -- 1.11.2.1 Proxies of core and mantle -- 1.11.2.2 Proxies of crustal extraction -- 1.11.2.3 Proxies reflecting plate tectonics -- 1.11.2.4 Paleolatitude proxies -- 1.11.2.5 Paleoclimate and other proxies -- 1.11.2.6 Kinematic proxies -- 1.11.3 Are the supercontinents the same, similar, or different? -- 1.11.4 Precambrian events and supercontinent cycle -- 1.12 Conclusions and suggestions for future work -- 1.13 How we proceed in this book -- Acknowledgments -- Appendices -- References. , 2 A mantle dynamics perspective on the drift of cratons and supercontinent formation in Earth's history -- 2.1 Introduction -- 2.2 Methodology -- 2.2.1 Geodynamic modeling -- 2.2.2 Specific model setup -- 2.2.2.1 Continent configuration -- 2.2.3 Continental drift diagnostics -- 2.2.4 Computed evolutions -- 2.3 Results -- 2.3.1 Average mantle structure -- 2.3.2 Temporal changes in surface plate motions and continental drift -- 2.3.3 Geodynamic surface evolutions -- 2.3.3.1 Homogeneous continent-size distribution (case A) -- 2.3.3.2 Heterogeneous continent-size distribution (case B) -- 2.3.3.3 More vigorous mantle flow (case C) -- 2.4 Long-term cooling of the mantle (case D) -- 2.5 Discussion -- 2.5.1 Supercontinent formation scenarios and grouping of continental units -- 2.5.2 Inclination frequency sampling and inferences on the GAD hypothesis -- 2.5.3 Challenges in the comparison to paleomagnetic data -- 2.5.4 Model limitations and future directions -- 2.6 Conclusion -- Acknowledgments -- References -- 3 Precambrian geomagnetic field-an overview -- 3.1 Introduction -- 3.2 Precambrian geomagnetic field-characteristic features -- 3.3 Inclination frequency analysis -- 3.4 Field reversals -- 3.5 Paleosecular variation -- 3.6 Paleointensity -- 3.7 Continental drift -- 3.8 Results -- 3.9 Conclusion -- Acknowledgments -- References -- 4 The Precambrian paleogeography of Laurentia -- 4.1 Introduction and broad tectonic history -- 4.1.1 Laurentia's initial formation -- 4.1.2 Protracted Proterozoic accretionary growth followed by collisional orogenesis -- 4.1.3 Neoproterozoic rifting -- 4.1.4 Similarities in Laurentia's Proterozoic and Phanerozoic tectonic histories -- 4.2 Paleomagnetic pole compilation -- 4.3 Differential motion before Laurentia amalgamation -- 4.4 Paleogeography of an assembled Laurentia. , 4.5 Comparing paleogeographic models to the paleomagnetic compilation -- 4.6 Paleoenvironmental constraints on paleolatitude -- 4.7 Evaluating Laurentia's Proterozoic paleogeographic neighbors -- 4.7.1 Paleogeographic connections prior to initial Laurentia assembly -- 4.7.2 Amazonia -- 4.7.3 Australia and East Antarctica -- 4.7.4 Baltica -- 4.7.5 Kalahari -- 4.7.6 North China -- 4.7.7 Siberia -- 4.8 The record implies plate tectonics throughout the Proterozoic -- 4.9 Conclusion -- Acknowledgments -- Notes -- Glossary -- References -- 5 The Precambrian drift history and paleogeography of Baltica -- 5.1 Introduction -- 5.2 Geological evolution of Baltica -- 5.2.1 General geological outline for Baltica -- 5.2.2 Geological evolution of Fennoscandia and formation of Baltica -- 5.2.2.1 Geological evolution of the Archean Karelian and Kola cratons of Fennoscandia -- 5.2.2.2 Crustal growth of Fennoscandia-the Svecofennian orogen -- 5.2.3 Geological evolution of Volgo-Sarmatia and formation of Baltica -- 5.2.4 Geological evolution of Baltica -- 5.2.4.1 Baltica within Nuna-different tectonic regimes -- 5.2.4.2 Igneous activity and rifting in Baltica reflecting initiation of the breakup on Nuna? -- 5.2.4.3 Late Mesoproterozoic-Neoproterozoic geological evolution of Baltica-the Rodinia cycle -- 5.3 Material and methods -- 5.3.1 Paleomagnetic poles of Baltica-latitudinal drift history and drift rate -- 5.3.2 Paleoclimatic indicators of Baltica-testing the reconstructed latitudinal drift history -- 5.4 Paleomagnetic evidence for the drift of Baltica -- 5.4.1 Review of the paleomagnetic poles of Baltica -- 5.4.1.1 Archean-Paleoproterozoic poles of subcratons of Baltica -- 5.4.1.2 Late Paleoproterozoic-Neoproterozoic poles for amalgamated Baltica -- 5.4.2 Latitudinal drift of Baltica -- 5.4.2.1 Archean-Paleoproterozoic latitudinal drift and amalgamation of Baltica. , 5.4.2.2 Late Paleoproterozoic-Neoproterozoic latitudinal drift of amalgamated Baltica -- 5.5 Paleoproterozoic-Neoproterozoic climatic indicators for Baltica -- 5.6 Drift velocities of Baltica and its subcratons with implication to tectonics -- 5.6.1 Archean-Paleoproterozoic drift velocities with implication to tectonics -- 5.6.2 Late Paleoproterozoic-Neoproterozoic drift velocities with implication to tectonics -- 5.7 Implications for Baltica in Superia supercraton and Nuna and Rodinia supercontinents -- 5.7.1 Karelian and Kola in Superia -- 5.7.2 Baltica in Nuna and Rodinia cycles -- 5.7.2.1 Baltica-Laurentia-Siberia -- 5.7.2.2 Baltica-Congo-São Francisco -- 5.7.2.3 Baltica-India in Nuna and Rodinia cycles -- 5.7.2.4 Baltica-Amazonia in Nuna and Rodinia cycles -- 5.8 Concluding remarks -- Acknowledgments -- Supplementary table -- References -- 6 The Precambrian drift history and paleogeography of Amazonia -- 6.1 Introduction -- 6.2 The Amazonian Craton -- 6.3 Quality criteria of paleomagnetic poles -- 6.4 Amazonian paleomagnetic data and apparent polar wander path -- 6.4.1 Amazonian latitude drift -- 6.4.2 Amazonian apparent polar wander path and the polarity time scale -- 6.4.3 Amazonia pre-Columbia -- 6.4.4 Amazonia in a long-lived Columbia? -- 6.4.5 Amazonian Craton in the Rodinia supercontinent -- 6.4.6 Amazonian Craton in Gondwana -- 6.5 Final remarks -- Acknowledgments -- References -- 7 The Precambrian drift history and paleogeography of Río de la Plata craton -- 7.1 Introduction -- 7.2 Geology of the Río de la Plata craton -- 7.2.1 Piedra Alta Terrane (PA) -- 7.2.2 Tandilia terrane (T) -- 7.2.3 Nico Perez terrane (NP) and Dom Feliciano Belt (DFB) -- 7.3 Material -- 7.4 Results -- 7.5 Discussion -- 7.5.1 RP and Precambrian continents -- 7.5.2 Paleoclimatic record of RP -- 7.6 Conclusions -- Acknowledgements -- References. , 8 Precambrian paleogeography of Siberia -- 8.1 Introduction -- 8.2 Geology of the Siberian Craton -- 8.3 Paleomagnetic data and paleolatitudes of Siberian Craton -- 8.4 Possible neighbors of Siberian Craton -- 8.5 Conclusion -- Acknowledgments -- References -- 9 Whence Australia: Its Precambrian drift history and paleogeography -- 9.1 Introduction to the Precambrian geology of Australia -- 9.2 Material -- 9.2.1 Paleomagnetic studies -- 9.2.1.1 Archean poles -- Archean Hamersley banded-iron formations and iron ores -- 9.2.1.2 Paleo-Mesoproterozoic -- Kimberley Craton -- Paleo-Mesoproterozoic McArthur Basin/Pine Creek Inlier -- 9.2.1.3 Mesoproterozoic -- Middleback Ranges -- Gawler Craton -- Warakurna large igneous province -- The Albany-Fraser Belt -- 9.2.1.4 Neoproterozoic -- Mundine Dyke Swarm, WA -- Central Australian successions -- Dykes of the Yilgarn Craton, WA -- South Australian successions -- 9.2.2 Data selection -- 9.3 Results: original and age-binned apparent polar wander paths -- 9.3.1 Raw apparent polar wander curve -- 9.3.2 Age-binned APW curve -- 9.4 Discussion -- 9.4.1 Implications for supercontinents -- 9.4.1.1 Australian Cratons in Kenorland (c. 2.77-2.47Ga) -- 9.4.1.2 Australian Cratons in Nuna -- 9.4.1.3 Australian Cratons in Rodinia -- 9.4.2 Neoproterozoic intracontinental rotation -- 9.4.3 Implications for assembly and potential separation events of the Australian cratons -- 9.4.4 Paleoclimate indicators -- 9.4.5 Australian paleolatitudes in a global perspective -- 9.5 Summary -- References -- 10 The Precambrian drift history and paleogeography of India -- 10.1 Introduction -- 10.2 Data selection -- 10.2.1 Southern Indian Block (Dharwar, Bastar, and Singhbhum cratons) -- 10.2.1.1 Dharwar craton results -- 10.2.1.1.1 Bastar craton -- 10.2.1.1.2 Singhbhum craton. , 10.2.2 Northern Indian Block (Aravalli-Delhi-Marwar-Banded Gneiss Complex/Bundelkhand craton).
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  • 2
    Publication Date: 2024-02-08
    Description: Shells of the giant clam Tridacna can provide decade-long records of past environmental conditions via their geochemical composition and structurally through growth banding. Counting the daily bands can give an accurate internal age model with high temporal resolution, but daily banding is not always visually retrievable, especially in fossil specimens. We show that daily geochemical cycles (e.g., Mg/Ca) are resolvable via highly spatially resolved laser-ablation inductively coupled plasma mass spectrometry (LA-ICPMS; 3 \xc3\x97 33 \xce\xbcm laser slit) in our Miocene (\xe2\x88\xbc10 Ma) specimen, even in areas where daily banding is not visually discernible. By applying wavelet transformation on the measured daily geochemical cycles, we quantify varying daily growth rates throughout the shell. These growth rates are thus used to build an internal age model independent of optical daily band countability. Such an age model can be used to convert the measured elemental ratios from a function of distance to a function of time, which helps evaluate paleoenvironmental proxy data, for example, regarding the timing of sub-seasonal events. Furthermore, the quantification of daily growth rates across the shell facilitates the evaluation of (co)dependencies between growth rates and corresponding elemental compositions.
    Keywords: Tridacna
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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