Beaulieu Fm., Cambresque Mbr., vicinity of Ferques, Bas-Boulonnais (Devonian of France)

Where: France (50.8° N, 1.8° E: paleocoordinates 22.1° S, 3.5° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Cambresque Member (Beulieu Formation), Frasnian (382.7 - 372.2 Ma)

• lower asymmetricus conodont zone. "Exact base of the Frasnian cannot be [precisely determined] because there is a fault at the base of the Beaulieu Shales"

• member-level stratigraphic resolution

Environment/lithology: marine; shale and 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 ["shale" mentioned in figure caption], 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 38685: authorized by Michael Foote, entered by Michael Foote on 28.04.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Ostreida - Pterineidae
Ptychopteria "sp. 1"1 Hall 1883 oyster
 Cardiidia - Grammysiidae
? Prothyris "sp. 2"1 Meek 1871 clam
 Lucinida - Mactromyidae
Paracyclas sp.1 Hall 1843 clam
Stenolaemata
 Cystoporida - Fistuliporidae
 Trepostomata - Atactotoechidae
 Trepostomata - Heterotrypidae
 Trepostomata - Amplexoporidae
Crinoidea
  -
Crinoidea indet.4 Miller 1821 Sea lily
Le Menn has given formal names to several columnal taxa.
 Monobathrida -
Strophomenata
 Productida - Productellidae
Productella subaculeata3 Murchison 1840
 Productida - Chonetidae
 Strophomenida - Douvillinidae
Rhynchonellata
 Athyridida - Athyrididae
 Spiriferinida - Cyrtinidae
 Spiriferida - Cyrtospiriferidae
 Spiriferida - Mucrospiriferidae
 Atrypida - Atrypidae
Spinatrypa "sp. G"3 Stainbrook 1951
 Rhynchonellida - Trigonirhynchiidae
 Orthida - Schizophoriidae
Schizophoria striatula3 von Schlotheim 1813
Anthozoa
 Auloporida - Aulocystidae
"Plexituba" briceae5 tabulate coral
 Stauriida - Disphyllidae