Evidence for structural controls on the deposition of the late Jurassic-early Cretaceous Purbeck Limestone Group, Dorset, southern England

    Research output: Chapter in Book/Report/Conference proceedingChapter

    Abstract

    Integration of field studies with subsurface data demonstrate that deposition of the late Jurassic-early Cretaceous Purbeck Limestone Group occurred under semi-arid conditions during an important phase of synsedimentary extensional activity in the Wessex Basin. Use of structural restorations and neotectonic analogue-studies support the introduction of a new model to account for the regional and local along-strike variability in deposition of the Purbeck Limestone Group. It is proposed that the segmented nature of the episodically-active, basin-bounding Purbeck Fault explains observed thickness and sedimentological variations, including lateral facies changes and clast reworking. In addition to affording a tectonic framework in which to understand the rich palaeontological assemblages, the new depositional model also provides a mechanism for explaining the rapid death and unusual preservation of conifer forests through rapid submergence following co-seismic activity on the normal fault system.
    Original languageEnglish
    Title of host publicationLife and Environments in Purbeck Times
    EditorsAndrew R Milner, David J Batten
    Place of PublicationLondon
    PublisherPalaeontological Association
    Pages21-40
    Number of pages20
    ISBN (Print)9780901702739
    Publication statusPublished - Dec 2002

    Publication series

    NameSpecial papers in palaeontology
    Volume68
    ISSN (Print)0038-6804

    Fingerprint

    structural control
    Jurassic
    limestone
    Cretaceous
    submergence
    neotectonics
    reworking
    basin
    clast
    normal fault
    coniferous tree
    tectonics
    field study
    restoration
    seismic activity

    Cite this

    Underhill, J. R. (2002). Evidence for structural controls on the deposition of the late Jurassic-early Cretaceous Purbeck Limestone Group, Dorset, southern England. In A. R. Milner, & D. J. Batten (Eds.), Life and Environments in Purbeck Times (pp. 21-40). (Special papers in palaeontology; Vol. 68). London: Palaeontological Association.
    Underhill, John R. / Evidence for structural controls on the deposition of the late Jurassic-early Cretaceous Purbeck Limestone Group, Dorset, southern England. Life and Environments in Purbeck Times. editor / Andrew R Milner ; David J Batten. London : Palaeontological Association, 2002. pp. 21-40 (Special papers in palaeontology).
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    abstract = "Integration of field studies with subsurface data demonstrate that deposition of the late Jurassic-early Cretaceous Purbeck Limestone Group occurred under semi-arid conditions during an important phase of synsedimentary extensional activity in the Wessex Basin. Use of structural restorations and neotectonic analogue-studies support the introduction of a new model to account for the regional and local along-strike variability in deposition of the Purbeck Limestone Group. It is proposed that the segmented nature of the episodically-active, basin-bounding Purbeck Fault explains observed thickness and sedimentological variations, including lateral facies changes and clast reworking. In addition to affording a tectonic framework in which to understand the rich palaeontological assemblages, the new depositional model also provides a mechanism for explaining the rapid death and unusual preservation of conifer forests through rapid submergence following co-seismic activity on the normal fault system.",
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    Underhill, JR 2002, Evidence for structural controls on the deposition of the late Jurassic-early Cretaceous Purbeck Limestone Group, Dorset, southern England. in AR Milner & DJ Batten (eds), Life and Environments in Purbeck Times. Special papers in palaeontology, vol. 68, Palaeontological Association, London, pp. 21-40.

    Evidence for structural controls on the deposition of the late Jurassic-early Cretaceous Purbeck Limestone Group, Dorset, southern England. / Underhill, John R.

    Life and Environments in Purbeck Times. ed. / Andrew R Milner; David J Batten. London : Palaeontological Association, 2002. p. 21-40 (Special papers in palaeontology; Vol. 68).

    Research output: Chapter in Book/Report/Conference proceedingChapter

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    N2 - Integration of field studies with subsurface data demonstrate that deposition of the late Jurassic-early Cretaceous Purbeck Limestone Group occurred under semi-arid conditions during an important phase of synsedimentary extensional activity in the Wessex Basin. Use of structural restorations and neotectonic analogue-studies support the introduction of a new model to account for the regional and local along-strike variability in deposition of the Purbeck Limestone Group. It is proposed that the segmented nature of the episodically-active, basin-bounding Purbeck Fault explains observed thickness and sedimentological variations, including lateral facies changes and clast reworking. In addition to affording a tectonic framework in which to understand the rich palaeontological assemblages, the new depositional model also provides a mechanism for explaining the rapid death and unusual preservation of conifer forests through rapid submergence following co-seismic activity on the normal fault system.

    AB - Integration of field studies with subsurface data demonstrate that deposition of the late Jurassic-early Cretaceous Purbeck Limestone Group occurred under semi-arid conditions during an important phase of synsedimentary extensional activity in the Wessex Basin. Use of structural restorations and neotectonic analogue-studies support the introduction of a new model to account for the regional and local along-strike variability in deposition of the Purbeck Limestone Group. It is proposed that the segmented nature of the episodically-active, basin-bounding Purbeck Fault explains observed thickness and sedimentological variations, including lateral facies changes and clast reworking. In addition to affording a tectonic framework in which to understand the rich palaeontological assemblages, the new depositional model also provides a mechanism for explaining the rapid death and unusual preservation of conifer forests through rapid submergence following co-seismic activity on the normal fault system.

    M3 - Chapter

    SN - 9780901702739

    T3 - Special papers in palaeontology

    SP - 21

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    Underhill JR. Evidence for structural controls on the deposition of the late Jurassic-early Cretaceous Purbeck Limestone Group, Dorset, southern England. In Milner AR, Batten DJ, editors, Life and Environments in Purbeck Times. London: Palaeontological Association. 2002. p. 21-40. (Special papers in palaeontology).