Blacourt Fm., Griset Mbr., vicinity of Ferques, Bas-Boulonnais (Devonian of France)

Where: France (50.8° N, 1.8° E: paleocoordinates 24.4° S, 4.3° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Griset Member (Blacourt Formation), Givetian (387.7 - 382.7 Ma)

• Lower varcus ensensis conodont zone

• member-level stratigraphic resolution

Environment/lithology: marine; black limestone and reef rocks

• "The Blacourt Formation is a compact, massive bedded, black fossiliferous marine limestone, with argillaceous layers and some small reefs in the Griset Member. The lower [Cambreseque] and upper [Patures] member of the Beaullieu Formation are mainly terrigenous, except for its lowest beds, the so-called Cedule Limestone. The middle [Noces] member consists of dolomite lenses, passing upward into shales, and to a reef build-up capped by fossiliferous limestones. The base of the lower [Fiennes] member of the succeeding Ferques Formation is a biostromal dolomite overlain by yellow, then brownis-dark dolomite and dolomitic sandstones. These are overlain by the fully marine fossiliferous Ferques Limestone. The lower part of the [second-from-bottom] Bois Member and the upper part of the [third-from-bottom] Parisienne Member are biostromal. In the upper [Gris] member, sediments are more argillaceous..."

Primary reference: P. Morzadec, D. Brice, C. Cygan, R. Feist, C. Majeste-Menjoulas, F. Paris, and P. R. Racheboeuf. 2000. The Devonian of France: a tentative tie with the GSSP of the Devonian stages. Courier Forschungs-Institut Senckenberg 225:115-129 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 38681: authorized by Michael Foote, entered by Michael Foote on 28.04.2004, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Trilobita
 Phacopida - Phacopidae
"Phacops" sp.7 Emmrich 1839 trilobite
 Proetida - Proetidae
Ostracoda
  -
Ostracoda indet.4 Latreille 1802 ostracod
 Metacopida -
 Podocopida -
 Podocopida - Bythocytheridae
 Podocopida -
 Podocopida - Bythocyprididae
Bythocypris "sp. G1"4 Brady 1880 ostracod
 Podocopida - Healdiidae
 Podocopida -
Podocopina indet.4 Sars 1866 ostracod
 Podocopida - Bairdiocyprididae
 Podocopida - Pachydomellidae
 Podocopida - Macrocyprididae
 Podocopida - Acratiidae
Acratia "cf. sp. G2"4 Delo 1930 ostracod
Acratia "sp. 3"4 Delo 1930 ostracod
Acratia "sp. G1"4 Delo 1930 ostracod
 Podocopida - Bairdiidae
Bairdia "cf. sp. G2"4 M'Coy 1844 ostracod
Bairdia "sp. 1"4 M'Coy 1844 ostracod
 Podocopida -
 Palaeocopida - Knoxitidae
 Palaeocopida - Youngiellidae
 Palaeocopida - Paraparchitidae
Paraparchitidae indet.4 Scott 1959 ostracod
Paraparchites "sp. G"4 Ulrich and Bassler 1906 ostracod
Paraparchites "sp. 1"4 Ulrich and Bassler 1906 ostracod
Paraparchites "sp. G prime"4 Ulrich and Bassler 1906 ostracod
sp. G'
 Palaeocopida - Amphissitidae
Amphissites sp.4 Girty 1910 ostracod
 Palaeocopida - Primitiidae
? Coryellina sp.4 Kellett 1935 ostracod
 Palaeocopida - Coelonellidae
 Palaeocopida -
 Palaeocopida - Drepanellidae
 Palaeocopida -
 Platycopida - Cavellinidae
Rostroconchia
 Conocardiida -
Conocardioidea sp.9 Miller 1889
Stenolaemata
 Cyclostomata - Corynotrypidae
 Cystoporida - Fistuliporidae
 Rhabdomesida - Nikiforovellidae
Crinoidea
  -
Crinoidea indet.3 Miller 1821 Sea lily
Le Menn has given formal names to several columnal taxa.
Strophomenata
 Productida - Productellidae
Productella subaculeata2 Murchison 1840
 Productida - Chonetidae
Rhynchonellata
 Athyridida - Athyrididae
 Terebratulida - Stringocephalidae
Stringocephalus burtini2 Defrance 1825
 Spiriferinida - Cyrtinidae
 Spiriferida - Spinocyrtiidae
 Spiriferida - Reticulariidae
 Atrypida - Atrypidae
Spinatrypa "sp. G"2 Stainbrook 1951
 Rhynchonellida - Trigonirhynchiidae
 Rhynchonellida - Yunnanellidae
Anthozoa
 Auloporida - Syringoporidae
Chia polonica6 tabulate coral
 Auloporida - Aulocystidae
Aulocystis jurkowicensis6 tabulate coral
 Auloporida - Romingeriidae
Remesia crispa6 tabulate coral
 Auloporida - Auloporidae
Aulopora stasinskae6 tabulate coral
Aulopora ex gr. parva6 tabulate coral
 Cystiphyllida - Cystiphyllidae
"Lythophyllum secundum" = Cystiphylloides (Lythophyllum)8
"Lythophyllum secundum" = Cystiphylloides (Lythophyllum)8 horn coral
 Cystiphyllida - Digonophyllidae
 Rugosa -
 Stauriida - Ptenophyllidae
 Stauriida - Stringophyllidae
 Stauriida - Disphyllidae
Disphyllia wangi8 horn coral
Disphyllia magnei8 horn coral
Spinophyllum arduum8 L├╝tte 1985 horn coral
 Stauriida - Columnariidae
 Stauriida - Phillipsastreidae
 Stauriida - Cyathophyllidae
 Rugosa -
Stromatoporoidea
 Stromatoporida - Syringostromellidae
 Stromatoporida - Stromatoporidae
 Stromatoporida - Ferestromatoporidae
Ferestromatopora sp.5 Yavorsky 1955
 Actinostromatida - Actinostromatidae
 Syringostromatida - Coenostromatidae
 Syringostromatida - Stachyoditidae
 Syringostromatida - Syringostromatidae
Parallelopora sp.5 Bargatzky 1881
 Stromatoporellida - Stromatoporellidae
 Stromatoporellida - Trupetostromatidae
 Clathrodictyida - Clathrodictyidae
 Clathrodictyida - Atelodictyidae
 Clathrodictyida - Tienodictyidae
 Clathrodictyida - Gerronostromatidae
  -