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  • 1
    Electronic Resource
    Electronic Resource
    Evolution of the Appalachian/Caledonian Orogen (1969)
    [s.l.] : Nature Publishing Group
    Nature 222 (1969), S. 124-129 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The structure of the Appalachian/Caledonian orogen is described and a new model for its evolution ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/222124a0
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    Paper (German National Licenses)
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  • 2
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    Prelithification and synlithification tectonic foliation development in a clastic sedimentary sequence (2016)
    Geological Society of America (GSA)
    In: Geology
    Details
    Publication Date: 2016-03-23
    Description: The current view regarding the timing of regionally developed penetrative tectonic fabrics in sedimentary rocks is that their development postdates lithification of those rocks. In this case, fabric development is achieved by a number of deformation mechanisms, including grain rigid body rotation, crystal-plastic deformation, and pressure solution. The latter is believed to be the primary mechanism responsible for the domainal structure of cleavage in low-grade metamorphic rocks. In this study we combine field observations with strain studies to characterize considerable (〉50%) Acadian crustal shortening in a Devonian clastic sedimentary sequence from southwest Ireland. Despite these high levels of shortening there is a marked absence of the domainal cleavage structure and intraclast deformation that are expected with this level of deformation. Fabrics in these rocks are predominantly a product of rigid body rotation and repacking of extraformational clasts during deformation of a clastic sedimentary sequence before lithification was complete.
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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  • 3
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    Reply to Discussion on 'The sole of an ophiolite: the Ordovician Bay of Islands Complex, Newfoundland' Journal, 170, 2013, pp. 715-722 (2015)
    Geological Society of London
    Details
    Publication Date: 2015-06-24
    Print ISSN: 0016-7649
    Topics: Geosciences
    Published by Geological Society of London
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  • 4
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    Prelithification and synlithification tectonic foliation development in a clastic sedimentary sequence: REPLY (2016)
    Geological Society of America (GSA)
    In: Geology
    Details
    Publication Date: 2016-06-30
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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  • 5
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    The classic Wilson cycle revisited (2018)
    Geological Society of London
    Details
    Publication Date: 2018
    Description: 〈p〉In the first application of the developing plate tectonic theory to the pre-Pangaea world 50 years ago, attempting to explain the origin of the Paleozoic Appalachian–Caledonian orogen, J. Tuzo Wilson asked the question: ‘Did the Atlantic close and then reopen?’. This question formed the basis of the concept of the Wilson cycle: ocean basins opening and closing to form a collisional mountain chain. The accordion-like motion of the continents bordering the Atlantic envisioned by Wilson in the 1960s, with proto-Appalachian Laurentia separating from Europe and Africa during the early Paleozoic in almost exactly the same position that it subsequently returned during the late Paleozoic amalgamation of Pangaea, now seems an unlikely scenario. We integrate the Paleozoic history of the continents bordering the present day basin of the North Atlantic Ocean with that of the southern continents to develop a radically revised picture of the classic Wilson cycle The concept of ocean basins opening and closing is retained, but the process we envisage also involves thousands of kilometres of mainly dextral motion parallel with the margins of the opposing Laurentia and Gondwanaland continents, as well as complex and prolonged tectonic interaction across an often narrow ocean basin, rather than the single collision suggested by Wilson.〈/p〉
    Print ISSN: 0375-6440
    Electronic ISSN: 2041-4927
    Topics: Geosciences
    Published by Geological Society of London
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  • 6
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    The Highland Controversy revisited: Geikie's compounded blunder (2018)
    Geological Society of London
    Details
    Publication Date: 2018
    Description: 〈sec〉〈st〉Extract〈/st〉〈p〉Sir Archibald Geikie (1835–1924) was a formidable and authoritarian figure who played a central part in British geology in Victorian and Edwardian times. He was a protégé of Sir Roderick Impey Murchison and became Professor of Geology at the University of Edinburgh (1871), Director of the Geological Survey of Scotland (1871) and Director-General of the Geological Survey of Great Britain (1882), a position that he held with stern, but kindly, attention to his staff until his retirement to Haslemere in 1901. He was a prolific writer of both biographies of his mentors and a huge number of books and papers on a wide variety of geological topics. His rather long-winded and self-congratulatory autobiography (Geikie 1924) was published in the year of his death. His principal hobby was as a proficient sketcher and water colourist, mostly of scenes of geological interest, many of which adorn and illustrate his published works. Geikie had a powerful influence on Victorian and Edwardian geology and was rewarded by many honours, including Fellow of the Royal Society (1864), a knighthood (1891) and the Order of Merit (1914).〈/p〉〈/sec〉〈p〉〈b〉...〈/b〉〈/p〉 〈p〉〈i〉This 250-word extract was created in the absence of an abstract.〈/i〉〈/p〉
    Print ISSN: 0375-6440
    Electronic ISSN: 2041-4927
    Topics: Geosciences
    Published by Geological Society of London
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  • 7
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    Prelithification and synlithification tectonic foliation development in a clastic sedimentary sequence (2016)
    Geological Society of America (GSA)
    In: Geology
    Details
    Publication Date: 2016-04-15
    Description: The current view regarding the timing of regionally developed penetrative tectonic fabrics in sedimentary rocks is that their development postdates lithification of those rocks. In this case, fabric development is achieved by a number of deformation mechanisms, including grain rigid body rotation, crystal-plastic deformation, and pressure solution. The latter is believed to be the primary mechanism responsible for the domainal structure of cleavage in low-grade metamorphic rocks. In this study we combine field observations with strain studies to characterize considerable (〉50%) Acadian crustal shortening in a Devonian clastic sedimentary sequence from southwest Ireland. Despite these high levels of shortening there is a marked absence of the domainal cleavage structure and intraclast deformation that are expected with this level of deformation. Fabrics in these rocks are predominantly a product of rigid body rotation and repacking of extraformational clasts during deformation of a clastic sedimentary sequence before lithification was complete.
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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  • 8
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    The Highland Controversy revisited: Geikie's compounded blunder (2018)
    Geological Society (of London)
    Details
    Publication Date: 2018-10-30
    Description: Extract Sir Archibald Geikie (1835–1924) was a formidable and authoritarian figure who played a central part in British geology in Victorian and Edwardian times. He was a protégé of Sir Roderick Impey Murchison and became Professor of Geology at the University of Edinburgh (1871), Director of the Geological Survey of Scotland (1871) and Director-General of the Geological Survey of Great Britain (1882), a position that he held with stern, but kindly, attention to his staff until his retirement to Haslemere in 1901. He was a prolific writer of both biographies of his mentors and a huge number of books and papers on a wide variety of geological topics. His rather long-winded and self-congratulatory autobiography (Geikie 1924) was published in the year of his death. His principal hobby was as a proficient sketcher and water colourist, mostly of scenes of geological interest, many of which adorn and illustrate his published works. Geikie had a powerful influence on Victorian and Edwardian geology and was rewarded by many honours, including Fellow of the Royal Society (1864), a knighthood (1891) and the Order of Merit (1914). ... This 250-word extract was created in the absence of an abstract.
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
    Published by Geological Society (of London)
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  • 9
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    The classic Wilson cycle revisited (2018)
    Geological Society (of London)
    Details
    Publication Date: 2018-02-11
    Description: In the first application of the developing plate tectonic theory to the pre-Pangaea world 50 years ago, attempting to explain the origin of the Paleozoic Appalachian–Caledonian orogen, J. Tuzo Wilson asked the question: ‘Did the Atlantic close and then reopen?’. This question formed the basis of the concept of the Wilson cycle: ocean basins opening and closing to form a collisional mountain chain. The accordion-like motion of the continents bordering the Atlantic envisioned by Wilson in the 1960s, with proto-Appalachian Laurentia separating from Europe and Africa during the early Paleozoic in almost exactly the same position that it subsequently returned during the late Paleozoic amalgamation of Pangaea, now seems an unlikely scenario. We integrate the Paleozoic history of the continents bordering the present day basin of the North Atlantic Ocean with that of the southern continents to develop a radically revised picture of the classic Wilson cycle The concept of ocean basins opening and closing is retained, but the process we envisage also involves thousands of kilometres of mainly dextral motion parallel with the margins of the opposing Laurentia and Gondwanaland continents, as well as complex and prolonged tectonic interaction across an often narrow ocean basin, rather than the single collision suggested by Wilson.
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
    Published by Geological Society (of London)
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  • 10
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    Reply to Discussion on ‘The sole of an ophiolite: the Ordovician Bay of Islands Complex, Newfoundland’ Journal, 170, 2013, pp. 715–722 (2015)
    Geological Society of London
    Details
    Publication Date: 2015-05-21
    Print ISSN: 0016-7649
    Topics: Geosciences
    Published by Geological Society of London
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