The origin and significance of the distribution of shelly macrofauna in late Dinantian carbonate mud mounds of Derbyshire

Gutteridge, P.

doi:10.1144/pygs.48.1.23

Cited by 7 publications

(9 citation statements)

References 19 publications

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“…The present-day dip of exposed bedding reflects that of the original flank slopes of the mud mound at progressive growth stages. Concentrations of brachiopods hosted in scour features occur on the sides of the mud mounds (Gutteridge 1990), but these are distinct from the brachiopod shell beds discussed within this paper, which are observed onlapping or overlying the mounds. It is most likely that the relationship of the whole-fossil packstone beds with the mud mounds resulted from the local palaeogeography with the mound topography enabling shallow lagoons to form around 5).…”

Section: Stratigraphy and Lithofaciesmentioning

confidence: 62%

Sedimentary context and palaeoecology of Gigantoproductus shell beds in the Mississippian Eyam Limestone Formation, Derbyshire carbonate platform, central England

Nolan

Angiolini

Jadoul

et al. 2017

PYGS

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A sedimentological study was conducted at two localities exposing the Mississippian Eyam Limestone Formation of the Derbyshire carbonate platform, UK. Ricklow Quarry comprises seven facies with diverse skeletal assemblages, representing deposition on the inner to middle ramp within open marine waters. Once-a-Week Quarry comprises four facies, dominated by crinoidal debris representing deposition on the inner ramp. Both localities expose Gigantoproductus shell beds. Palaeoecological analysis of a single shell bed from each locality enabled investigation of the rapid colonization and success of this taxon on the platform. At Ricklow Quarry, on the eastern side of a localized mud mound, both life (>72% of thin and thick-shelled brachiopods in life position) and neighbourhood assemblages are present. A low-moderate diversity community (<1.37 and <0.8 Shannon diversity index) rapidly established over relict Brigantian mud mounds. Shell beds are preluded by intervals of decreased energy that allowed larvae to settle. Once established, the dominance of thick-shelled individuals enabled baffling, potentially providing localized shelter for larvae and nearby individuals. At Once-a-Week Quarry, where no mud mound is present, only thick-shelled Gigantoproductus species and a low diversity community (<1.07 Shannon diversity index) exclusively comprising neighbourhood assemblages (37% in life position) is present. The presence of inactive mud mounds at Ricklow Quarry appears to have been the key to the success of Gigantoproductus species enabling the onset of stable communities in the shelter provided by the relict mound. Once the first palaeocommunities were established, larvae dispersed and colonized higher energy settings, such as at Once-a-Week Quarry.

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Section: Stratigraphy and Lithofaciesmentioning

confidence: 62%

Sedimentary context and palaeoecology of Gigantoproductus shell beds in the Mississippian Eyam Limestone Formation, Derbyshire carbonate platform, central England

Nolan

Angiolini

Jadoul

et al. 2017

PYGS

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“…Carbonate mounds are highly characteristic of the Viséan (Nichols, 1961(Nichols, , 1965Bancroft et al, 1988;Horbury, 1992;Gutteridge, 1990;Gutteridge, 1995;Somerville, 2003). They most closely resemble the Type 2 mounds of Somerville (2003), interpreted to accrete from a crinoid -bryozoan -brachiopod core with abundant cemented micro-peloidal micrite such that structural support by organisms was short lived, and the mound was rapidly cemented.…”

Section: Platform Margin Depositional Environmentmentioning

confidence: 98%

Unravelling evidence for global climate change in Mississippian carbonate strata from the Derbyshire and North Wales Platforms, UK

Manifold

Strother

Gold

et al. 2021

JGS

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The Mississippian Derbyshire and North Wales carbonate platforms were formed in similar tectonic settings within the Pennine and East Irish Sea Basin, respectively. The Derbyshire Platform was surrounded by sub-basins to the north, west, and south whilst the North Wales Platform, 130 km west, had a simpler land-attached geometry. Comparison of these age-equivalent platforms allows the controls on sedimentation, at an important juncture in Earth history, to be evaluated. Both platforms are dominated by moderate-to-high-energy, laterally discontinuous facies, with weak evidence for facies cyclicity, suggesting multiple controls on deposition. Influx of siliciclastic mud on the North Wales Platform led to perturbations in carbonate accumulation; along with abundant palaeosols and coal beds this implies a more humid climate, or shallower water depths compared to the Derbyshire Platform. On both platforms, exposure surfaces can rarely be correlated over >500 metres except for a regionally correlative palaeokarstic surface at the Asbian-Brigantian boundary. This exposure event appears to coincide with a significant regional facies change. Given the lack of evidence for ordering and cyclicity within the strata, the Asbian-Brigantian boundary may mark a significant event that could reflect onset of a transitional climate, prior to the second glaciation event in the Late Palaeozoic Ice Age.

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“…This study demonstrates that brachiopods are common skeletal components in all lithofacies of the mud mound complex at Ricklow, even in the automicrite-rich ones (L7, L9). The centimetre-to decimetre-size lenses of L8 with a richer brachiopod content in the mud mound complex core (LA2) might correspond to those interpreted by Gutteridge (1990) as "storm-scoured pockets" colonised by brachiopods. Gutteridge (1990) based this interpretation on the sharp edges of the pockets truncating structures in the mud mound complex core, concentration of pockets towards the top of the mud mound complex core, and marked asymmetry of their bases.…”

Section: Brachiopod Distributionmentioning

confidence: 99%

“…The aim of this study is the reassessment of the depositional lithofacies and brachiopod fauna distribution in brachiopod-rich mud mounds from the upper Visean of the Derbyshire Carbonate Platform, UK (Gutteridge 1990(Gutteridge , 1995, according to Gutteridge (1990) brachiopods in the Derbyshire mud mounds are restricted to "storm-scoured" pockets in the mud mound surface. The final aim is to reach a better understanding of the palaeoenvironment and depositional model of the Derbyshire mud mounds.…”

Section: Introductionmentioning

confidence: 99%

Revisiting the upper Visean mud mounds from Derbyshire (UK): the role of brachiopods in their growth

Carniti

Porta

Banks

et al. 2023

Facies

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Several brachiopod-rich mud mounds occur in the upper Visean (Brigantian) of the Derbyshire Carbonate Platform succession in UK. The re-evaluation of the lithofacies architecture of a Derbyshire mud mound complex, developed in an intraplatform middle-ramp environment, led to the recognition of three lithofacies associations: (a) a 10 m thick basal unit of automicrite boundstone with siliceous sponge spicules and brachiopod–bryozoan packstone to wackestone beds; (b) a 10 m thick, 250 m wide, lens-shaped, convex-up massive core of clotted peloidal micrite and fenestellid bryozoan boundstone with sponge spicules; (c) inclined brachiopod–bryozoan–crinoid packstone flank beds. In the mud mound complex core, most of the carbonate mud with clotted peloidal and structureless micrite fabric is the result of biologically induced and influenced in-situ precipitation processes (automicrite). Brachiopods are not, as previously thought, limited to storm-scoured “pockets” in the mud mound complex core but are abundant and diverse in all lithofacies and lived on the irregular mud mound complex surface concentrating in depressions sustained by automicrite boundstone and the growth of bryozoans and sponges. The upper Visean Derbyshire mud mounds are, thus, representatives of a newly defined fenestellid bryozoan–brachiopod–siliceous sponge mud mound category, occurring in various middle–upper Visean Western European sites, a sub-type of the fenestellid bryozoan–crinoid–brachiopod Type 3 buildups of Bridges et al. (1995). These mud mounds, and other types of brachiopod-rich buildups, developed in carbonate platform settings between fair-weather and storm wave base, in dysphotic environments with dispersed food resources during the Visean. Brachiopod mud mound colonisation was favoured by moderate water depth, availability of food resources, and diverse substrates.

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The origin and significance of the distribution of shelly macrofauna in late Dinantian carbonate mud mounds of Derbyshire

Cited by 7 publications

References 19 publications

Sedimentary context and palaeoecology of Gigantoproductus shell beds in the Mississippian Eyam Limestone Formation, Derbyshire carbonate platform, central England

Sedimentary context and palaeoecology of Gigantoproductus shell beds in the Mississippian Eyam Limestone Formation, Derbyshire carbonate platform, central England

Unravelling evidence for global climate change in Mississippian carbonate strata from the Derbyshire and North Wales Platforms, UK

Revisiting the upper Visean mud mounds from Derbyshire (UK): the role of brachiopods in their growth

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