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  • Journals
  • Other Sources  (1,852)
  • Elsevier  (1,190)
  • Springer  (662)
  • 2010-2014  (1,394)
  • 1995-1999  (458)
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  • Journals
  • Articles  (1,763,083)
  • Other Sources  (1,852)
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  • 1
    Publication Date: 2021-03-29
    Description: According to a model by Cerling (1991, 1999), the carbon isotope composition of calcretes should depend on the soil type and the CO2-concentration in the atmosphere. We have tested Cerling’s model by investigating 14 Palaeozoic sections with soil profiles. A large number of carbonate types of different genetic origin exist in the localities examined. Comparing the Palaeozoic samples with recent and subrecent calcretes, it can be demonstrated that anhedral, cryptocrystalline (〈10 μm) and subhedral microcrystalline (10 - 40 μm) carbonates are clearly of pedogenic origin. Crystals of larger size with a poikilotopic texture are of groundwater or burial diagenetic origin. Macro- and micromorphological features, typical of recent calcretes, occur in several soil profiles, but thin section microscopy reveals a strong diagenetic overprint of most pedogenic carbonates. Time equivalent sections with comparable soil types (protosols, calcisols and vertisols) show large variations in carbon isotope composition. On the other hand, different carbonate generations at one site do not differ much. Therefore Palaeozoic calcretes appear to be unsuitable for a deduction of the Palaeozoic CO2-concentration.
    Description: German Research Foundation (DFG)
    Description: research
    Keywords: 551.9 ; 552.5 ; VKB 350 ; VJJ 110 ; VCA 300 ; VKB 332 ; VKA 300 ; VKB 371 ; VEA 000 ; VKB 372 ; Lithogenese {Sedimentologie} ; Geochemie der Stabilen Isotopen ; Paläozoische Geologie ; Sedimentationsbedingungen ; Petrogenese ; Klastische Sedimentgesteine ; Europa insgesamt {Geologie} ; Karbonatische Sedimentgesteine ; Kohlenstoffkreislauf ; C-isotope ; Jungpaläozoikum ; Paläopedologie ; Kalkkruste ; CO2 ; calcrete ; carbon cycle ; upper Paleozoic ; paleosol ; C-13/C-12 ; Europa ; paläoklima ; Europe ; 38.41 ; 38.61 ; 38.32
    Language: English
    Type: article
    Format: application/pdf
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  • 2
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    Elsevier
    In:  Marine Geology (Internat. J. of Marine Geol., Geochem. and Geophys.), Amsterdam, Elsevier, vol. 21, no. 1, pp. 83-96, pp. 2486, (ISBN 1-86239-117-3)
    Publication Date: 1999
    Keywords: Tsunami(s) ; Geol. aspects
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  • 3
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    Springer
    In:  Springer
    Publication Date: 1996
    Keywords: Textbook of mathematics ; Data analysis / ~ processing ; Textbook of geophysics ; Chaotic behaviour
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  • 4
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    Elsevier
    In:  Amsterdam, 404 pp., Elsevier, vol. 19, pp. 503, (ISBN 0121341305)
    Publication Date: 1998
    Keywords: Seismics (controlled source seismology) ; Reflection seismics ; Handbook of geophysics
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  • 5
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    Elsevier
    In:  Oxford, xxii+320 pp., 1st ed., Elsevier, vol. 13, no. 3, pp. 632 pp., (ISBN 0-8493-0068-1)
    Publication Date: 1995
    Keywords: Seismology ; Earthquake hazard ; Earthquake risk ; Earthquake engineering, engineering seismology ; Recurrence of earthquakes ; Statistical investigations ; Strong motions ; Taiwan ; SAF ; bridges ; landslides ; floods ; socio-economic ; impact
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  • 6
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    Elsevier
    In:  New York, 546 pp., Elsevier, vol. 15, no. 85, pp. 585, (ISBN 0080424309)
    Publication Date: 1996
    Description: This book will help structural geologists keep abreast of rapid changes in work practices resulting from the personal computer revolution. I Computer-Aided Learning; II Microstructural Analysis; III Analysis of Orientation Data; IV Strain and Kinematic Analysis; V Mathematical and Physical Modeling; VI Structural Mapping and GIS. ISBN: 0-08-043110-0
    Keywords: Structural geology ; software ; Textbook of geology ; Stress ; GIS ; Tectonics ; Geol. aspects ; Stress ; cracks and fractures (.NE. fracturing) ; Fracture
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  • 7
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    Springer
    In:  Berlin, Springer, vol. 20, no. Publ. No. 12, pp. 23-40, (ISBN 1-4020-3326-5, VIII + 343 pp.)
    Publication Date: 1998
    Keywords: Global ; Change ; development ; fuzzy ; decision ; making ; ecology ; climate ; TBMeteorology ; agriculture ; emission ; wealth ; politics ; greenhouse ; ozone ; Modelling ; carbon ; dioxide ; CO2
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  • 8
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    Elsevier
    In:  New York, 340 pages, Elsevier, vol. 10, no. 1, pp. 1-40, (ISBN: 0-08-040286-0)
    Publication Date: 1996
    Keywords: Textbook of informatics ; Textbook of geology ; Data analysis / ~ processing ; plotting
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  • 9
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    Springer
    In:  Bull., Polar Proj. OP-O3A4, Handbuch zur Erkundung des Untergrundes von Deponien und Altlasten hrsg. von der Bundesanstalt für Geowissenschaften und Rohstoffe, Heidelberg, Springer, vol. 3, no. 1, pp. 81-92, (ISBN: 3-540-23712-7)
    Publication Date: 1997
    Keywords: Applied geophysics ; environment ; waste ; disposal ; Seismics (controlled source seismology) ; Geoelectrics ; Gravimetry, Gravitation ; RADAR ; Borehole geophys. ; Physical properties of rocks ; Handbook of geophysics ; Knodel
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  • 10
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    Elsevier
    In:  Int. J. Rock Mech. & Min Sci., Taipei, Elsevier, vol. 34, no. 3-4, pp. 155-162, pp. B09401, (ISBN: 0-12-018847-3)
    Publication Date: 1997
    Keywords: Borehole geophys. ; Stress ; Borehole breakouts ; Hydraulic fracturing ; stability ; Anisotropy ; shear ; tensile ; Strength ; Rock mechanics
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