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  • De Gruyter  (2)
  • Geological Society of America  (2)
  • 2020-2024  (4)
  • 1930-1934
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  • 1
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    Integrierte Datenverarbeitungssysteme für die Unternehmensführung (2021)
    De Gruyter
    Details
    Publikationsdatum: 2023-12-20
    Schlagwort(e): HD28-70 ; bic Book Industry Communication::K Economics, finance, business & management::KJ Business & management::KJM Management & management techniques::KJMV Management of specific areas
    Sprache: Deutsch
    Format: image/jpeg
    Standort Signatur Erwartet Verfügbarkeit
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    E-BOOK
  • 2
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    Meteorological Disasters in Medieval Britain (AD 1000‒1500) (2023)
    De Gruyter | De Gruyter
    Details
    Publikationsdatum: 2023-11-16
    Beschreibung: Natural disasters frequently affected medieval populations. This book explores what happened when meteorological hazards struck how medieval communities reacted and what steps they took to protect themselves against future risks. Through archaeological and historical sources of evidence, the diverse impacts unleashed by disasters on medieval society are traced to provide a well-rounded understanding of catastrophes in the medieval past.
    Schlagwort(e): Natural disasters ; medieval beliefs ; resilience ; flooding ; bic Book Industry Communication::G Reference, information & interdisciplinary subjects::GT Interdisciplinary studies::GTG General studies ; bic Book Industry Communication::H Humanities::HB History::HBL History: earliest times to present day::HBLC Early history: c 500 to c 1450/1500::HBLC1 Medieval history ; bic Book Industry Communication::P Mathematics & science::PD Science: general issues ; bic Book Industry Communication::R Earth sciences, geography, environment, planning::RG Geography::RGB Physical geography & topography ; bic Book Industry Communication::R Earth sciences, geography, environment, planning::RN The environment
    Sprache: Englisch
    Format: image/jpeg
    Standort Signatur Erwartet Verfügbarkeit
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    E-BOOK
  • 3
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    Superhydrous hematite and goethite: A potential water reservoir in the red dust of Mars? (2021)
    Geological Society of America
    Details
    Publikationsdatum: 2021-07-20
    Beschreibung: Water can be stored in nominally anhydrous minerals as substitutional hydroxyl, generating vast but commonly unrecognized H2O reservoirs in ostensibly dry regimes. Researchers have long known that hematite (α-Fe2O3) can accommodate small concentrations of hydroxyl through the substitution of Fe3+ by 3H+. Our study of natural hematite has demonstrated the occurrence of “hydrohematite” phases that are 10–20 mol% deficient in Fe and accordingly contain 3.6–7.8 mol% structural water. Intergrown with natural hydrohematite samples were superhydrous goethite-like phases exhibiting an Fe deficiency of 10–20 mol% relative to end-member goethite (α-FeOOH). We synthesized hydrohematite in alkaline solutions (pH 9–12) at low temperatures (T 〈 200 °C) using fresh ferrihydrite as the transient precursor, and we observed a nonclassical crystallization pathway involving vacancy inoculation by Fe as nanocrystals evolved. The high level of incorporation of H2O in iron (hydr)oxides dramatically alters their behaviors as catalysts and pigments, and the presence of hydrohematite in rocks may rule out high-T diagenesis. We propose that hydrohematite is common in low-T occurrences of Fe oxide on Earth, and by extension it may inventory large quantities of water in apparently arid planetary environments, such as the surface of Mars.
    Print ISSN: 0091-7613
    Digitale ISSN: 1943-2682
    Thema: Geologie und Paläontologie
    Publiziert von Geological Society of America
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
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    Late Mesozoic–Cenozoic cooling history of the northeastern Tibetan Plateau and its foreland derived from low-temperature thermochronology (2021)
    Geological Society of America
    Details
    Publikationsdatum: 2021-03-05
    Beschreibung: The growth history and formation mechanisms of the Cenozoic Tibetan Plateau are the subject of an intense debate with important implications for understanding the kinematics and dynamics of large-scale intracontinental deformation. Better constraints on the uplift and deformation history across the northern plateau are necessary to address how the Tibetan Plateau was constructed. To this end, we present updated field observations coupled with low-temperature thermochronology from the Qaidam basin in the south to the Qilian Shan foreland in the north. Our results show that the region experienced a late Mesozoic cooling event that is interpreted as a result of tectonic deformation prior to the India-Asia collision. Our results also reveal the onset of renewed cooling in the Eocene in the Qilian Shan region along the northern margin of the Tibetan Plateau, which we interpret to indicate the timing of initial thrusting and plateau formation along the plateau margin. The interpreted Eocene thrusting in the Qilian Shan predates Cenozoic thrust belts to the south (e.g., the Eastern Kunlun Range), which supports out-of-sequence rather than northward-migrating thrust belt development. The early Cenozoic deformation exploited the south-dipping early Paleozoic Qilian suture zone as indicated by our field mapping and the existing geophysical data. In the Miocene, strike-slip faulting was initiated along segments of the older Paleozoic suture zones in northern Tibet, which led to the development of the Kunlun and Haiyuan left-slip transpressional systems. Late Miocene deformation and uplift of the Hexi corridor and Longshou Shan directly north of the Qilian Shan thrust belt represent the most recent phase of outward plateau growth.
    Print ISSN: 0016-7606
    Digitale ISSN: 1943-2674
    Thema: Geologie und Paläontologie
    Publiziert von Geological Society of America
    Standort Signatur Erwartet Verfügbarkeit
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    AKTUELLE ARTIKEL
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