A new geological map of the outcrop areas of the Brabant Massif (Belgium)

Herbosch, Alain; Debacker, Timothy

doi:10.20341/gb.2018.003

Cited by 8 publications

(12 citation statements)

References 26 publications

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“…20.9). Records of the species from Belgium (Samuelsson & Verniers, 2000;Herbosch & Verniers, 2014) and NW France (Paris, 1981(Paris, , 1990 are also from the 'middle' Arenig or higher.…”

Section: B Assemblagementioning

confidence: 99%

“…It was described by Paris (1981) from Brittany and depicted by Paris (1990) as ranging from the middle Arenig Eremochitina brevis Biozone into the Llanvirn Series in southern Gondwanan terranes. Other records are from the Tremadocian Stage of South China (Wang et al 2013;Liang et al 2017Liang et al , 2018 and the Darriwilian Stage in South America (Grahn 2006), Belgium (Herbosch & Verniers, 2014) and Oman (Sansom et al 2009;Heward et al 2018), with similar forms (L. cf. obeligis) recorded from the upper Tremadocian of Morocco (Nowak et al 2016) and NW England (Amberg et al 2017) and the Darriwilian Stage in Iran (Ghavidel-syooki et al 2014).…”

Section: C Assemblagementioning

confidence: 99%

“…Cyathochitina calix and Lagenochitina pirum have lowest occurrences in the Dapingian Stage elsewhere. Cyathochitina calix, for example, has lowest occurrences in the Dapingian Stage of Baltoscandia and South China (Grahn, 1984;Liang et al 2018;Nõlvak et al 2019) and has been recorded from the Darriwilian Stage of Baltoscandia, Avalonia and South China (Jenkins, 1967;Grahn, 1984;Nõlvak & Grahn, 1993;Grahn & Nõlvak, 2007;Tammekand et al 2010;Herbosch & Verniers, 2014;Liang et al 2018;Nõlvak et al 2019). It is the index species for the early Darriwilian Cyathochitina calix Biozone (Paris, 1990;Webby et al 2004;Cooper & Sadler, 2012).…”

Section: D Assemblagementioning

confidence: 99%

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Chitinozoan biostratigraphy of the regional Arenig Series in Wales and correlation with the global Lower–Middle Ordovician series and stages

et al. 2022

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The Arenig Fawr area of North Wales constitutes the type area for the British Lower to Middle Ordovician Arenig Series and is complemented by sections in the Carmarthen and Whitland areas of South Wales. We describe chitinozoan assemblages from both areas in order to aid correlation of the Arenig Series in its type region with the global Ordovician series and stages. Chitinozoans recorded from Arenig Fawr provide permissive rather than conclusive evidence but suggest that the Henllan Ash Member correlates with the upper Floian Stage Slice Fl3 or lower Dapingian Stage Slice Dp1. Better results were obtained from South Wales where six chitinozoan assemblages are distinguished, ranging in age from late Tremadocian to middle Darriwilian (early Llanvirn). Most species are known from South China, Gondwana and/or Baltica where there are controls on ranges. They show that much of the lower Arenig (Moridunian) succession in South Wales correlates with the upper Floian Stage (Fl3). Correlatives of the lower and middle Floian Stage (Fl1, Fl2), if present, must be represented by the Ogof Hên Formation and lowest Carmarthen Formation. Chitinozoan assemblages from the upper Arenig Series (Fennian Stage) are more readily correlated with Gondwanan biozones and indicate correlation of the Fennian Stage with the Dapingian and lower Darriwilian (Dw1) stages. The middle Arenig Whitlandian Stage is constrained in South Wales to an interval from the uppermost Floian Stage to the basal Dapingian Stage, resulting in an inferred increased rate of sediment accumulation.

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“…20.9). Records of the species from Belgium (Samuelsson & Verniers, 2000;Herbosch & Verniers, 2014) and NW France (Paris, 1981(Paris, , 1990 are also from the 'middle' Arenig or higher.…”

Section: B Assemblagementioning

confidence: 99%

Section: C Assemblagementioning

confidence: 99%

Section: D Assemblagementioning

confidence: 99%

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Chitinozoan biostratigraphy of the regional Arenig Series in Wales and correlation with the global Lower–Middle Ordovician series and stages

et al. 2022

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“…A similar situation is observed for the overlying Devonian succession in these wells. According to Van Adrichem Boogaert & Kouwe (1994), the Lower Devonian sediments were eroded or were not deposited, an interpretation that is based on the inferred timing of the Brabantian inversion phase related to the onset of the Variscan Orogeny (Herbosch & Debacker, 2018;Pharaoh, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Evidence exists for a compressional deformation event, likely relating to the Brabantian inversion phase (Debacker, 2002(Debacker, , 2012Verniers et al, 2002;Sintubin et al, 2009). To the south, southwest and southeast of the Brabant Massif area, the lower Palaeozoic succession is truncated by a major unconformity, with deformed strata overlying relatively undeformed Devonian to Carboniferous deposits (Herbosch & Debacker, 2018). Based on the youngest deformed basement rocks in boreholes on the Brabant Massif (Pridoli to Lochkovian, latest Silurian to earliest Devonian; Verniers & Van Grootel, 1991) and the oldest cover sediments above the Brabantian unconformity (Givetian, Middle Devonian;De Vos et al, 1993), deformation along the southern rim of the Brabant Massif is thought to have taken place between the latest Silurian and the Middle Devonian (Herbosch & Debacker, 2018).…”

mentioning

confidence: 99%

Palynological indications for Silurian – earliest Devonian age strata in the Netherlands

Houben¹,

Vis²

2021

Netherlands Journal of Geosciences

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Knowledge of the stratigraphic development of pre-Carboniferous strata in the subsurface of the Netherlands is very limited, leaving the lithostratigraphic nomenclature for this time interval informal. In two wells from the southwestern Netherlands, Silurian strata have repeatedly been reported, suggesting that these are the oldest ever recovered in the Netherlands. The hypothesised presence of Silurian-aged strata has not been tested by biostratigraphic analysis. A similar lack of biostratigraphic control applies to the overlying Devonian succession. We present the results of a palynological study of core material from wells KTG-01 and S05-01. Relatively low-diversity and poorly preserved miospore associations were recorded. These, nonetheless, provide new insights into the regional stratigraphic development of the pre-Carboniferous of the SW Netherlands. The lower two cores from well KTG-01 are of a late Silurian (Ludlow–Pridoli Epoch) to earliest Devonian (Lochkovian) age, confirming that these are the oldest sedimentary strata ever recovered in the Netherlands. The results from the upper cored section from the pre-Carboniferous succession in well KTG-01 and the cored sections from the pre-Carboniferous succession in well S05-01 are more ambiguous. This inferred Devonian succession is, in the current informal lithostratigraphy of the Netherlands, assigned to the Banjaard group and its subordinate Bollen Claystone formation, of presumed Frasnian (i.e. early Late Devonian) age. Age-indicative Middle to Late Devonian palynomorphs were, however, not recorded, and the overall character of the poorly preserved palynological associations in wells KTG-01 and S05-01 may also suggest an Early Devonian age. In terms of lithofacies, however, the cores in well S05-01 can be correlated to the upper Frasnian – lower Famennian Falisolle Formation in the Campine Basin in Belgium. Hence, it remains plausible that an unconformity separates Silurian to Lower Devonian strata from Upper Devonian (Frasnian–Famennian) strata in the SW Netherlands. In general, the abundance of miospore associations points to the presence of a vegetated hinterland and a relatively proximal yet relatively deep marine setting during late Silurian and Early Devonian times. This differs markedly from the open marine depositional settings reported from the Brabant Massif area to the south in present-day Belgium, suggesting a sediment source to the north. The episodic presence of reworked (marine) acritarchs of Ordovician age suggests the influx of sedimentary material from uplifted elements on the present-day Brabant Massif to the south, possibly in relation to the activation of a Brabant Arch system.

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Brussels’ bedrock paleorelief from borehole-controlled power laws linking polarised H/V resonance frequencies and sediment thickness

et al. 2022

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A new geological map of the outcrop areas of the Brabant Massif (Belgium)

Cited by 8 publications

References 26 publications

Chitinozoan biostratigraphy of the regional Arenig Series in Wales and correlation with the global Lower–Middle Ordovician series and stages

Chitinozoan biostratigraphy of the regional Arenig Series in Wales and correlation with the global Lower–Middle Ordovician series and stages

Palynological indications for Silurian – earliest Devonian age strata in the Netherlands

Brussels’ bedrock paleorelief from borehole-controlled power laws linking polarised H/V resonance frequencies and sediment thickness

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