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Palaeoecology of corals and stromatoporoids in a Late Silurian biostrome in Estonia

100%

Kershaw S., Motus M.-A.

Acta Palaeontologica Polonica

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2016

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tom 61

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nr 1

A middle Ludlow biostrome at Katri, western Estonia, the richest accumulation of corals and stromatoporoids in Estonia, is partly exposed in a coastal section. The fully marine biostrome consists of five fossiliferous layers of carbonate skeletons, grouped into Facies 1 (grainstone-packstone, Layers 1, 3, 5) and Facies 2 (wackestone, interbedded Layers 2, 4). Pressure solution degraded original sedimentary relationships and morphologies of stromatoporoids, tabulates and rugosans which constructed the biostrome, but the two facies have major faunal differences. Facies 1 is rich in stromatoporoids “Stromatopora” bekkeri and Plectostroma scaniense (low to high domical up to ca. 30 cm in basal length); and tabulate Favosites forbesi (bulbous to high domical up to ca. 25 cm wide). In Facies 2, all three taxa are less common and much smaller. Instead, the most abundant stromatoporoid is laminar Syringostromella borealis up to 30 cm basal length; the most abundant coral is erect branching Laceripora cribrosa, as scattered fragments up to 24 cm long. Neither occurs in Facies 1. Six other stromatoporoid taxa, 5 other tabulate and 5 rugosan taxa occur uncommonly in the biostrome, mostly in both facies. The Katri biostrome is slightly younger than, but facially similar to biostromes in the middle Ludlow Hemse Group on Gotland ca. 250 km WSW, with well-known stromatoporoid faunas. Corals are abundant in Hemse biostromes. Several key stromatoporoids occur in both the Hemse biostromes and Katri, but two abundant taxa in Hemse biostromes are absent in Katri and two tabulate corals abundant in Katri are missing in Hemse biostromes. Thus there was a wide distribution of such biostromes in the central Baltic large shallow marine carbonate platform, but with previously unreported variable assemblages presumed due to facies features not recognised in the sediments.

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Late Famennian stromatoporoids from Debnik Anticline, southern Poland

80%

Wolniewicz P.

Acta Palaeontologica Polonica

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2009

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tom 54

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nr 2

337-350

Famennian Stromatoporoidea from the Quasiendothyra communis Foraminiferal Zone and slightly younger strata from the Dębnik anticline, southern Poland, form a succession of three consecutive assemblages. Assemblages 1 and 3 consist of representatives of the order Clathrodictyida, while assemblage 2 is dominated by the order Labechiida. The clathrodictyids are represented by the genus Gerronostroma, and labechiids are represented by the genus Stylostroma. Species assigned here to the genus Gerronostroma show a network of amalgamated pillars in the central part of the columns, a feature regarded by previous authors as typical of the genus Clavidictyon. Two new species, Stylostroma multiformis sp. nov. and Gerronostroma raclaviense sp. nov., are described. Stromatoporoids from southern Poland differ from the Famennian fauna of western Europe, showing affinity to eastern European and Siberian Stromatoporoidea.

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Stromatoporoids from a Middle Devonian reef in South China and their palaeoecological implication

61%

Huang J., Liang K., Wang Y., Kershaw S., Jeon J., Li Y., Qie W.

Acta Palaeontologica Polonica

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2022

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tom 67

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nr 3

Ograniczanie wyników

3 Acta Palaeontologica Polonica

2 Kershaw S.

1 Huang J.

1 Jeon J.

1 Li Y.

1 Liang K.

1 Motus M.-A.

1 Qie W.

1 Wang Y.

1 Wolniewicz P.

1 2022

1 2016

1 2009

Palaeoecology of corals and stromatoporoids in a Late Silurian biostrome in Estonia

Late Famennian stromatoporoids from Debnik Anticline, southern Poland

Stromatoporoids from a Middle Devonian reef in South China and their palaeoecological implication