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  • 1
    Online Resource
    Online Resource
    Paleoceanographic changes during the Albian–Cenomanian in the Tethys and North Atlantic and the onset of the Cretaceous chalk
    Elsevier BV ; 2015
    In:  Global and Planetary Change Vol. 126 ( 2015-03), p. 46-61
    Details
    In: Global and Planetary Change, Elsevier BV, Vol. 126 ( 2015-03), p. 46-61
    Type of Medium: Online Resource
    ISSN: 0921-8181
    URL: Article
    DOI: 10.1016/j.gloplacha.2015.01.005
    RVK:
    RA 1000
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2015
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    SSG: 13
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  • 2
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    A close-up view of the Permian–Triassic boundary based on expanded organic carbon isotope records from Norway (Trøndelag and Finnmark Platform)
    Elsevier BV ; 2010
    In:  Global and Planetary Change Vol. 74, No. 3-4 ( 2010-12), p. 156-167
    Details
    In: Global and Planetary Change, Elsevier BV, Vol. 74, No. 3-4 ( 2010-12), p. 156-167
    Type of Medium: Online Resource
    ISSN: 0921-8181
    URL: Article
    DOI: 10.1016/j.gloplacha.2010.10.007
    RVK:
    RA 1000
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2010
    detail.hit.zdb_id: 20361-0
    detail.hit.zdb_id: 2016967-X
    SSG: 13
    SSG: 14
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  • 3
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    Online Resource
    Palaeoceanography of Lower Cretaceous Alpine platform carbonates
    Wiley ; 2013
    In:  Sedimentology Vol. 60, No. 1 ( 2013-01), p. 131-151
    Details
    In: Sedimentology, Wiley, Vol. 60, No. 1 ( 2013-01), p. 131-151
    Abstract: Shallow‐water carbonate platforms evolve in an interplay of local, regional and global dynamics, thereby generating a detailed record of environmental conditions. Platform sediments constitute important archives of past environmental change and, as such, they are increasingly analysed for the information they contain on wider‐scale patterns. The integration of this information with palaeoceanographic data obtained from deeper‐water sediments provides a powerful tool to develop a more diverse and complete image of past environmental change. In this contribution, the remains of the northern Tethyan carbonate platform of Early Cretaceous age cropping out in the western Swiss Jura and the Helvetic Alps are used to illustrate the advantage of a palaeoceanographic approach in their interpretation. The tools applied are biostratigraphy and chemostratigraphy (carbon and strontium isotopes) in order to obtain a precise age model for correlation with (hemi‐)pelagic sediments in adjacent basins, sequence stratigraphy as a means to reconstruct the impact of sea‐level change, phosphorus stratigraphy as a proxy for trophic levels, facies and microfacies analyses as a gateway to gain better insight into the carbonate factory, and the detailed analysis of platform‐drowning unconformities as an indicator of wider‐scale palaeoenvironmental change. It is shown that changes from periods of predominantly photozoan to predominantly heterozoan carbonate production near the Berriasian–Valanginian boundary and middle early Aptian coincided with substantial increases in phosphorus burial rates and major carbon‐isotope excursions. Furthermore, the majority of the platform‐drowning episodes occurred just prior to and during episodes of major palaeoenvironmental change and, last but not least, the platform itself may have influenced the chemistry of adjacent basins and the carbon‐isotope composition of associated carbonates by the export of periplatform ooze.
    Type of Medium: Online Resource
    ISSN: 0037-0746 , 1365-3091
    URL: Issue
    URL: Article
    DOI: 10.1111/sed.2013.60.issue-1
    DOI: 10.1111/sed.12004
    RVK:
    RB 10121
    Language: English
    Publisher: Wiley
    Publication Date: 2013
    detail.hit.zdb_id: 2020955-1
    detail.hit.zdb_id: 206889-8
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  • 4
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    Online Resource
    Sea‐water circulation on an oolite‐dominated carbonate system in an epeiric sea (Middle Jurassic, Switzerland)
    Wiley ; 2013
    In:  Sedimentology Vol. 60, No. 1 ( 2013-01), p. 19-35
    Details
    In: Sedimentology, Wiley, Vol. 60, No. 1 ( 2013-01), p. 19-35
    Abstract: The Middle Jurassic Burgundy carbonate platform occupied a central part of the Central European Epeiric Sea during the Middle Jurassic. The facies architecture of the oolitic calcarenite bodies was affected by tidal currents on the platform and relative sea‐level changes. The δ 13 C‐values of inorganic carbonates, sampled in biostratigraphic‐defined intervals, do not match very well between closely spaced sections and, hence, are of restricted use for stratigraphic purposes. It appears that the platform interior might have been decoupled from the global carbon pool. Although deposited in a rapidly accumulating setting, the recorded isotope signatures might be affected by some local stratigraphic gaps. Nonetheless, the carbon isotope data imply lateral changes of the platform waters; these appear to be related to the position on the platform and to the sediment dispersal pattern, as evidenced by clay minerals. Adjacent to the eastern margin of the platform, detrital chlorite and illite occur in considerable proportions, both ascribed to a boreal source to the east and the north‐east. In contrast, smectite‐rich mixed‐layer clay mineral content increases significantly towards the platform interior, pointing to a delivery from the north‐west. All these data are suggestive of an overall clockwise current pattern in the Central European Epeiric Sea during the Middle Jurassic.
    Type of Medium: Online Resource
    ISSN: 0037-0746 , 1365-3091
    URL: Issue
    URL: Article
    DOI: 10.1111/sed.2013.60.issue-1
    DOI: 10.1111/sed.12007
    RVK:
    RB 10121
    Language: English
    Publisher: Wiley
    Publication Date: 2013
    detail.hit.zdb_id: 2020955-1
    detail.hit.zdb_id: 206889-8
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  • 5
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    Online Resource
    The Alpine Tethys rifted margins: Reconciling old and new ideas to understand the stratigraphic architecture of magma‐poor rifted margins
    Wiley ; 2013
    In:  Sedimentology Vol. 60, No. 1 ( 2013-01), p. 174-196
    Details
    In: Sedimentology, Wiley, Vol. 60, No. 1 ( 2013-01), p. 174-196
    Abstract: This study focuses on the assessment of the stratigraphic architecture of the proximal and distal Jurassic Alpine Tethys rifted margins. The aim of the study was to reconcile the major observations performed in the Alps through time with what is observed in present‐day magma‐poor rifted margins. The proximal and distal rifted margins reflect two evolutionary phases of rifting involving different structures and isostatic evolutions leading to different stratigraphic records. The proximal rifted margins formed from Upper Triassic to Pliensbachian times and resulted in the formation of classical half graben basins. Rift evolution changed drastically during Pliensbachian to Toarcian times when extension started to localize in the future distal rifted margins. Low‐angle detachment faults become the new elementary structure controlling final crustal tapering and eventually mantle exhumation to the sea floor. New structural elements controlling the stratigraphic architecture of the distal rifted margins include extensional allochthons and breakaway blocks, both resulting from the delamination of a keystone block, also referred to as hangingwall block, during hyper‐extension processes. To define the stratigraphic architecture of the proximal and distal rifted margins, three stratigraphic marker horizons are used, namely the top of the pre‐rift sequences, the top of the proximal margin syn‐tectonic sequence and the base of post‐rift sequences. Based on the distribution of these stratigraphic marker horizons across the Alpine units and a structural re‐evaluation of the rift structures, a synthetic tectono‐stratigraphic evolution of the Alpine Tethys domain is proposed that reconciles old and new ideas about how rift systems may evolve in space and time.
    Type of Medium: Online Resource
    ISSN: 0037-0746 , 1365-3091
    URL: Issue
    URL: Article
    DOI: 10.1111/sed.2013.60.issue-1
    DOI: 10.1111/sed.12017
    RVK:
    RB 10121
    Language: English
    Publisher: Wiley
    Publication Date: 2013
    detail.hit.zdb_id: 2020955-1
    detail.hit.zdb_id: 206889-8
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  • 6
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    Online Resource
    Late Jurassic to Cretaceous evolution of the eastern Tethyan Hawasina Basin (Oman Mountains)
    Wiley ; 2017
    In:  Sedimentology Vol. 64, No. 1 ( 2017-01), p. 87-110
    Details
    In: Sedimentology, Wiley, Vol. 64, No. 1 ( 2017-01), p. 87-110
    Abstract: Remnants of a Mesozoic continental margin can be studied today in the nappe pile of the Oman Mountains. Successions of the Arabian carbonate platform and the adjacent deep Hawasina Basin are preserved in the nappe pile and in the foothills of this Mountain range. The Jurassic–Cretaceous sediment successions of the Hawasina Basin (Sumeini and Hamrat Duru Group) are focus of this study. These basinal archives contain information on the response of an eastern Tethyan equatorial ocean system to multiple perturbations of the carbon cycle and of climate during the Cretaceous. Turbiditic continental slope and basinal successions formed near the Calcite Compensation Depth are difficult to date with biostratigraphy and sequence stratigraphy. The available stratigraphic framework for the Hawasina successions was not sufficient for tracing palaeoceanography through the time window of interest in this study. Therefore, existing sequence stratigraphy and biostratigraphy are complemented by additional biostratigraphic data and with a newly established carbon and strontium isotope chemostratigraphy. The Hawasina Basin was affected by sea‐level variations, by changes in oceanography and also by regional tectonics. A first major modification of oceanography occurred at the end of the Jurassic when pelagic Maiolica‐type sediments were accumulated in the deep basin and on adjacent submarine highs (Lower Member of Huwar and Sid'r formations). Pelagic to hemipelagic conditions existed until the Valanginian, marked by a major carbon isotope excursion. Pelagic sediments were replaced afterwards by a succession of fine to coarse‐grained turbidites of Hauterivian to Aptian age. The transition into the mid‐Cretaceous is marked by a sudden shift to fine‐grained siliceous or chert deposits, at a time when sediments enriched in organic carbon were accumulated in the western Tethys and Atlantic Oceans. The continental slope as well as the Hawasina Basin seemed to have been well‐ventilated during Early and mid‐Cretaceous time. Siliceous limestones and chert are indicators of well‐mixed and nutrient‐rich surface water, while the absence of black shales suggests young and oxygenated deep water with a possible source on the vast Arabian platform. These peculiar oceanographic conditions were most pronounced during the onset of the extreme greenhouse episodes of the Oceanic Anoxic Event 1a.
    Type of Medium: Online Resource
    ISSN: 0037-0746 , 1365-3091
    URL: Issue
    URL: Article
    DOI: 10.1111/sed.2017.64.issue-1
    DOI: 10.1111/sed.12326
    RVK:
    RB 10121
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 2020955-1
    detail.hit.zdb_id: 206889-8
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  • 7
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    Online Resource
    Palaeoenvironmental significance of organic facies and stable isotope signatures: the Ladinian San Giorgio Dolomite and Meride Limestone of Monte San Giorgio (Switzerland, WHL UNESCO)
    Wiley ; 2013
    In:  Sedimentology Vol. 60, No. 1 ( 2013-01), p. 239-269
    Details
    In: Sedimentology, Wiley, Vol. 60, No. 1 ( 2013-01), p. 239-269
    Abstract: The over 600 m thick Ladinian carbonate section of Monte San Giorgio (World Heritage List, United Nations Educational, Scientific and Cultural Organization, Switzerland), including the San Giorgio Dolomite and the Meride Limestone, was analysed with respect to its sedimentology, organic‐matter content (Rock‐Eval and palynofacies) and stable carbon and oxygen‐isotope composition. Application of geochemical proxies and optical data (transmitted light microscopy, epifluorescence, cathodoluminescence and scanning electron microscopy) allowed the assessment of the relative sea‐level trend and the characterization of the organic‐matter content. Three main organic‐matter assemblages were defined according to their composition and stratigraphic position. Overall, results suggest immature organic matter, predominantly of marine bacterial origin with an upsection‐increasing land plant‐derived contribution. Forcing factors controlling organic‐matter accumulation include changes in sea‐level, productivity and runoff which, in turn, were probably promoted by periods of rainfall following explosive volcanic activity. Enhanced productivity during sea‐level highstands is considered to have played a key role in black‐shale formation under anoxic–sulphidic conditions (mainly in the Besano Formation). In contrast, sea‐level lowstands, coupled with intensified runoff, resulted in increased basin restriction and in deposition of laminated limestone, mainly under lower dysoxic to anoxic conditions (chiefly in the Lower Meride Limestone). Under the latter conditions, benthic microbial activity produced most of the hydrogen‐rich organic matter, contributed to carbonate precipitation and also played a major role in taphonomic control on vertebrate fossil preservation. In more general terms, the Monte San Giorgio section proved to be an excellent testing ground, making it possible to compare diverse approaches with each other and, more specifically, to relate optical evidence to geochemical signatures.
    Type of Medium: Online Resource
    ISSN: 0037-0746 , 1365-3091
    URL: Issue
    URL: Article
    DOI: 10.1111/sed.2013.60.issue-1
    DOI: 10.1111/sed.12021
    RVK:
    RB 10121
    Language: English
    Publisher: Wiley
    Publication Date: 2013
    detail.hit.zdb_id: 2020955-1
    detail.hit.zdb_id: 206889-8
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  • 8
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    Online Resource
    Deciphering the message of Early Cretaceous drowning surfaces from the Helvetic Alps: What can be learnt from platform to basin correlations?
    Wiley ; 2013
    In:  Sedimentology Vol. 60, No. 1 ( 2013-01), p. 152-173
    Details
    In: Sedimentology, Wiley, Vol. 60, No. 1 ( 2013-01), p. 152-173
    Abstract: Drowning unconformities are a frequent feature of carbonate platforms and generally express the incapacity of shallow‐marine ecosystems to adapt to abrupt sea‐level rise and/or palaeoenvironmental change. During the late Hauterivian and early Barremian, the Helvetic carbonate platform experienced a major drowning phase documented by the phosphate and glauconite‐rich Altmann Member. It has been shown that a drowning unconformity in the form of a hardground at the base of the Altmann Member on the Pilatus summit (central Switzerland) results from a complex, polyphased diagenetic history that includes two main phases of phosphogenesis. Using carbon‐isotope stratigraphy, biostratigraphy and sequence stratigraphy, the correlation of this drowning unconformity from the Helvetic domain with more distal and more complete sedimentary archives allows reconstruction of the sequence‐stratigraphic context of the drowning surface, and also an estimation of the amount of time represented by the episodes of condensation. Unconformities associated with the Altmann Member drowning phase developed during transgressive episodes, when strong currents arrived onto the previously subaerially exposed platform, and periods of phosphogenesis may have lasted up to 2·8 Myr. Variations in trophic levels and hitherto less well‐known intervening emersion phases played an essential triggering role for the Altmann drowning phase. High‐resolution studies of drowning unconformities unravel the diversity of palaeoenvironmental parameters involved in the unfolding of such crises during the evolution of carbonate platforms.
    Type of Medium: Online Resource
    ISSN: 0037-0746 , 1365-3091
    URL: Issue
    URL: Article
    DOI: 10.1111/sed.2013.60.issue-1
    DOI: 10.1111/sed.12008
    RVK:
    RB 10121
    Language: English
    Publisher: Wiley
    Publication Date: 2013
    detail.hit.zdb_id: 2020955-1
    detail.hit.zdb_id: 206889-8
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  • 9
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    Online Resource
    Alpine sedimentology: An introduction and tribute to Albert Matter and Daniel Bernoulli
    Wiley ; 2013
    In:  Sedimentology Vol. 60, No. 1 ( 2013-01), p. 1-18
    Details
    In: Sedimentology, Wiley, Vol. 60, No. 1 ( 2013-01), p. 1-18
    Type of Medium: Online Resource
    ISSN: 0037-0746 , 1365-3091
    URL: Issue
    URL: Article
    DOI: 10.1111/sed.2013.60.issue-1
    DOI: 10.1111/sed.12014
    RVK:
    RB 10121
    Language: English
    Publisher: Wiley
    Publication Date: 2013
    detail.hit.zdb_id: 2020955-1
    detail.hit.zdb_id: 206889-8
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  • 10
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    Online Resource
    Late Permian–earliest Triassic high-resolution organic carbon isotope and palynofacies records from Kap Stosch (East Greenland)
    Elsevier BV ; 2015
    In:  Global and Planetary Change Vol. 133 ( 2015-10), p. 149-166
    Details
    In: Global and Planetary Change, Elsevier BV, Vol. 133 ( 2015-10), p. 149-166
    Type of Medium: Online Resource
    ISSN: 0921-8181
    URL: Article
    DOI: 10.1016/j.gloplacha.2015.08.006
    RVK:
    RA 1000
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2015
    detail.hit.zdb_id: 20361-0
    detail.hit.zdb_id: 2016967-X
    SSG: 13
    SSG: 14
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