Update of the Devonian lithostratigraphic subdivision in the subsurface of the Campine Basin (northern Belgium)

Lagrou, David; Coen-Aubert, Marie

doi:10.20341/gb.2016.017

Cited by 2 publications

(8 citation statements)

References 4 publications

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“…Since this is no more than a tentative indication, the age of the sediments assigned to the Bollen Claystone formation and the undifferentiated Banjaard group essentially remains elusive. In the Campine Basin, a relatively well-dated Frasnian to Famennian sedimentary succession is developed (Lagrou & Coen-Aubert, 2017). In particular, the sediments in the cores from well S05-01 are quite similar to those reported for the Falisolle Formation.…”

Section: Stratigraphic Interpretation Of Palynological Associationssupporting

confidence: 62%

“…In the Booischot borehole, the Booischot Formation is overlain by the Upper Devonian marine sediments of the Aisemont and Falisolle formations which are capped by Famennian sandstones assigned to the Evieux Formation. These latter three lithostratigraphic units are also present in the Heibaart borehole, above a few metres of shale and nodular limestone that is attributed to the Middle Frasnian Huccorgne Formation which rests directly on the Caledonian basement of the Brabant Massif (Lagrou & Coen-Aubert, 2017). In both boreholes a succession of richly fossiliferous nodular limestones and shales is assigned to the Aisemont Formation.…”

Section: Campine Basin (Belgium)mentioning

confidence: 83%

“…The palynological results do not unambiguously support the existence of such a major unconformity between the now confirmed Silurian earliest Devonian strata and the Lower Carboniferous limestones of the Zeeland Formation. In terms of lithological facies, the sediments assigned to the Bollen Claystone formation in well S05-01 resemble the upper Frasnianlower Famennian Falisolle Formation of the Campine Basin (Lagrou & Coen-Aubert, 2017).…”

Section: Discussionmentioning

confidence: 95%

“…A nearly 400 m thick continental conglomeratic succession is intersected close to the base of the Booischot borehole. These strata are formally described as the Booischot Formation by Lagrou & Coen-Aubert (2017). The upper part of the Booischot Formation is tentatively dated as late Givetian to late Frasnian in age.…”

Section: Campine Basin (Belgium)mentioning

confidence: 99%

“…The Aisemont Formation is overlain by green-grey shales with micaceous sand intercalations that are assigned to the Falisolle Formation. According to Lagrou & Coen-Aubert (2017), the Falisolle Formation straddles the Frasnian-Famennian boundary in terms of age, largely based on legacy acritarch and conodont interpretations (Kimpe et al, 1978;Vanguestaine et al, 1983). On top of this shaly succession, green and red alluvial sandstones are recorded in both boreholes in the Campine Basin.…”

Section: Campine Basin (Belgium)mentioning

confidence: 99%

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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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Section: Stratigraphic Interpretation Of Palynological Associationssupporting

confidence: 62%

Section: Campine Basin (Belgium)mentioning

confidence: 83%

Section: Discussionmentioning

confidence: 95%

Section: Campine Basin (Belgium)mentioning

confidence: 99%

Section: Campine Basin (Belgium)mentioning

confidence: 99%

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

Houben¹,

Vis²

2021

Netherlands Journal of Geosciences

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Updating Frasnian miospore zonation from the Boulonnais (Northern France) and comparison with new data from the Upper Palaeozoic cover on the Brabant Massif (Western Belgium)

et al. 2021

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Accurate palyno-analysis by S. Loboziak (from 1980 to 1983) of 28 samples from the Upper Givetian to the Middle Frasnian Blacourt, Beaulieu and Ferques Formations and of 44 samples of the Upper Frasnian to the Lower Famennian Hydrequent Formation are re-evaluated. Chelinospora concinna, Verrucosisporites bulliferus, Cirratriradites jekhowskyi, Lophozonotriletes media first occurrences are major criteria for Lower and Middle Frasnian, well calibrated by conodonts. Cymbosporites acanthaceus, Rugospora bricei, Grandispora gracilis, Diducites plicabilis, Corbulispora vimineus first occurrences allow to subdivide the Upper Frasnian where conodonts are poorly present. Samarisporites triangulatus versus Auroraspora pseudocrista taxonomy and stratigraphic significance are discussed. The reconnaissance borehole Nieuwkerke-De Seule (95W152), near the limit of the Upper Palaeozoic subcrop on the Brabant Massif (West Flanders, Belgium, 75 km east of the Boulonnais), which has intersected conodont-dated Givetian/Frasnian boundary at the transition between the Bois de Bordeaux and Bovesse Formations, contained poorly preserved miospores attributed to the triangulatus–concinna (TCo) Oppel Zones. In the nearby Nieuwkerke-Noordhoek borehole (95W153), strata also assigned to the Bovesse Formation yielded better preserved miospores which demonstrate a close succession of triangulatus–concinna (TCo) and bulliferus–jekhowskyi (BJ) Oppel Zones at the transition Lower–Middle Frasnian, also known in the Beaulieu Formation in the Boulonnais. Samples from the Heuvelland groundwater monitoring well (95W175), 10 km north of Nieuwkerke, contain the bricei-acanthaceus (BA) Oppel Zone suggesting a late Frasnian age, also known in the Hydrequent Formation in the Boulonnais area and in the Booischot Formation in the Booischot borehole (59E146) from the Campine Basin (Belgium). International correlation using Frasnian miospore zonation is attempted between the Pripyat Depression in Belarus, the Timan–Pechora province in Russia and North-West China.

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Update of the Devonian lithostratigraphic subdivision in the subsurface of the Campine Basin (northern Belgium)

Cited by 2 publications

References 4 publications

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

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

Updating Frasnian miospore zonation from the Boulonnais (Northern France) and comparison with new data from the Upper Palaeozoic cover on the Brabant Massif (Western Belgium)

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