The marine Devonian stratigraphy of Great Britain

Leveridge, B. E.; Shail, RK

doi:10.1016/j.pgeola.2011.03.003

Cited by 23 publications

(8 citation statements)

References 105 publications

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“…The Early Devonian to Carboniferous successions of SW England share a broadly equivalent tectonostratigraphical evolution with other massifs in the Rhenohercynian Zone (Franke & Engel 1982;Holder & Leveridge 1986b;Franke 2000;. They document the development of rift basins and a S-facing passive margin that, in the south, records convergence-related sedimentation and ophiolite obduction in the latest Devonian, consistent with a lower plate position relative to the S-dipping Rheic-Rhenohercynian suture (Leveridge & Hartley 2006;Shail & Leveridge 2009;Leveridge & Shail 2011a). A series of sub-basins have been defined (Leveridge et al 2002;Leveridge & Hartley 2006) (Fig.…”

Section: Sw England Devonian-carboniferous Sedimentation + Magmatismmentioning

confidence: 76%

“…Fluid inclusion analysis of syn-orogenic quartz veins from the Gramscatho Basin indicate several km of exhumation between D1 and D2 . SW England did not reach its current position, adjacent to southern England and Wales, until the end of Variscan convergence in the late Carboniferous (Holder & Leveridge 1986b;Woodcock et al 2007;Leveridge & Shail 2011a). The northern boundary of the Cornubian terrane, as defined by Day et al (1989), can be traced westwards from the Bristol Channel-Bray Fault and beneath the South Celtic Sea Basin; it is represented by significant S-dipping Variscan reflectors identified on deep seismic reflection profiles SWAT 2-3, SWAT 4 and SWAT 5 (BIRPS & ECORS 1986;Day et al 1989).…”

Section: Variscan Convergencementioning

confidence: 99%

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Late Paleozoic extensional reactivation of the Rheic–Rhenohercynian suture zone in SW England, the English Channel and Western Approaches

Alexander¹,

Shail

Leveridge³

2019

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The Rheic Ocean is a persistent feature of Paleozoic palaeogeographies whose closure contributed to the development of the Variscan orogen and formation of Pangaea. Geological and geophysical data indicate repeated episodes of Paleozoic rifting and plate convergence around SW England and the adjacent offshore areas. SW England occupied a lower plate position during the Devonian-Carboniferous, on the northern passive margin of the short-lived Rhenohercynian Ocean that had formed near a recently closed segment of the Rheic Ocean. Variscan plate convergence resulted in the development of the composite southwardsdipping Rheic-Rhenohercynian suture zone by the latest Devonian and inversion of the lower plate basins during the Carboniferous. Early Permian NNW-SSE extensional reactivation of this suture zone controlled the development of the Western Approaches Basins in its hangingwall and provides an excellent example of Wilson Cycle structural inheritance. The onshore expression of this episode includes shear zones and detachment faults consistent with top-to-the SSE extensional reactivation of Variscan thrust faults. There is a progression to higher-angle brittle extensional faults that cutout earlier structures. Exhumation of the lower plate was accompanied by Early Permian mantle and concomitant crustal partial melting, the construction of the Cornubian Batholith, and W-Sn-Cu fracture-hosted mineralisation.

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Section: Sw England Devonian-carboniferous Sedimentation + Magmatismmentioning

confidence: 76%

Section: Variscan Convergencementioning

confidence: 99%

Late Paleozoic extensional reactivation of the Rheic–Rhenohercynian suture zone in SW England, the English Channel and Western Approaches

Alexander¹,

Shail

Leveridge³

2019

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“…The Looe Basin includes non-marine sandstones and mudstones (Leveridge, 2011) but, more generally, the basin successions comprise mudstones and sandstones, along with minor limestones and cherts, deposited in shallow to deep-marine environments (Leveridge and Shail, 2011b). Rift-related mafic igneous rocks (basalts, dolerites and gabbros) are locally important constituents of the basin fills and sedimentary exhalative (SedEx) and volcanic massive sulphide (VMS) mineralisation styles locally occur (Benham et al, 2005).…”

Section: Geologymentioning

confidence: 99%

Automated mineralogical profiling of soils as an indicator of local bedrock lithology: a tool for predictive forensic geolocation

Pirrie

Crean

Pidduck

et al. 2019

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The use of soil evidence to identify an unknown location is a powerful tool to determine the provenance of an item in an investigation. We are particularly interested in the use of these indicators in nuclear forensic cases, whereby identification of locations associated with for example, a smuggled nuclear material, may be used to indicate the provenance of a find. The use of soil evidence to identify an unknown location relies on understanding and predicting how soils vary in composition depending on their geological / geographical setting. In this study, compositional links between the mineralogy of forty soils and the underlying bedrock geology were established. The soil samples were collected from locations with broadly similar climate and land use across a range of geological settings in a 'test bed' 3500 km 2 area of South West England. In this region, the soils formed through chemical weathering of the bedrock, representing a worst case for OFFICIAL

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“…The geological history of the British Rhenohercynian Zone is complex, as it was intimately associated with the closure of both the Iapetus and later the Rheic oceans and the subsequent continental collisions. As such, its structural interpretation is controversial (see summary of Leveridge & Shail, 2011). However, from Devonian to Mississippian times, the British Rhenohercynian Zone, which comprises all of the SW English Devonian (Holder & Leveridge, 1986), was formed from a series of fault-controlled basins on a southern-facing passive continental marginal on the southern flank of the Avalonian Terrane, during its docking with Laurentia (and so, in part, forming Laurussia) (Golonka & Gawęda, 2012).…”

Section: Geological Setting and Stratigraphymentioning

confidence: 99%

A new species ofHyattechinus(Echinoidea) from the type Devonian of the United Kingdom and implications for the distribution of Devonian proterocidarid echinoids

Thompson

Ewin

2018

Geol. Mag.

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Many of the most diverse clades of Late Palaeozoic echinoids (sea urchins) originated in the Devonian period. Our understanding of diversity dynamics of these Late Palaeozoic clades are thus informed by new systematic descriptions of some of their earliest members. The Proterocidaridae are a diverse and morphologically distinct clade of stem group echinoids with flattened tests and enlarged adoral pore pairs, which are first known from the Upper Devonian. We herein report on a new species of Hyattechinus, Hyattechinus anglicus n. sp., from the Upper Devonian of the North Devon Basin, Devon, UK. This is the first Devonian Hyattechinus known from outside of the Appalachian Basin, USA, and provides novel information regarding the palaeogeographic and stratigraphic distribution of proterocidarids in Late Devonian times. We additionally update the stratigraphic distribution of Devonian Hyattechinus from the Appalachian Basin, following recent biostratigraphic resolution of their occurrences. Hyattechinus appears to have been present in the Rheic echinoderm fauna during Late Devonian times, and comparison of the palaeoenvironmental setting of Hyattechinus anglicus with that of other Hyattechinus from the Famennian of the Appalachian Basin suggests that the genus may have preferred siliciclastic settings. Furthermore, this new taxon increases the diversity of echinoids from the Upper Devonian of Devon to three species.

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The marine Devonian stratigraphy of Great Britain

Cited by 23 publications

References 105 publications

Late Paleozoic extensional reactivation of the Rheic–Rhenohercynian suture zone in SW England, the English Channel and Western Approaches

Late Paleozoic extensional reactivation of the Rheic–Rhenohercynian suture zone in SW England, the English Channel and Western Approaches

Automated mineralogical profiling of soils as an indicator of local bedrock lithology: a tool for predictive forensic geolocation

A new species ofHyattechinus(Echinoidea) from the type Devonian of the United Kingdom and implications for the distribution of Devonian proterocidarid echinoids

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