Blacourt Fm., Bastien 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: Bastien Member (Blacourt Formation), Givetian (387.7 - 382.7 Ma)

• upper dengleri conodont zone

• member-level stratigraphic resolution

Environment/lithology: marine; black limestone

• "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 38684: authorized by Michael Foote, entered by Michael Foote on 28.04.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Ostracoda
 Metacopida -
 Podocopida -
 Podocopida - Bythocyprididae
Bythocypris "sp. G1"2 Brady 1880 ostracod
 Podocopida - Healdiidae
 Podocopida - Bairdiocyprididae
 Podocopida - Macrocyprididae
 Podocopida - Bairdiidae
Bairdia "sp. 1"2 M'Coy 1844 ostracod
 Podocopida -
 Palaeocopida - Coelonellidae
 Palaeocopida -
 Platycopida - Cavellinidae
Rhynchonellata
 Athyridida - Athyrididae
Anthozoa
 Auloporida - Roemeriidae
Roemeria infundibulifera4 tabulate coral
 Auloporida - Auloporidae
Aulopora stasinskae4 tabulate coral
Aulopora serpens4 Goldfuss 1829 tabulate coral
Stromatoporoidea
 Stromatoporellida - Stromatoporellidae