Beaulieu Fm. (undifferentiated), 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: Beaulieu Formation, Frasnian (382.7 - 372.2 Ma)

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

• formation-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 38812: authorized by Michael Foote, entered by Michael Foote on 05.05.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Corynexochida - Styginidae
 Phacopida - Acastidae
Heliopyge briceae n. sp.2 trilobite
Heliopyge sp.2 Haas and Mensink 1970 trilobite
Bradocryphaeus "sp. 1"2 Haas and Mensink 1970 trilobite
Bivalvia
 Myalinida - Myalinidae
Myalina sp.1 de Koninck 1842 clam
 Ostreida - Pterineidae
"Leiopteria rigauxi n. sp." = Leptodesma (Leiopteria)1
"Leiopteria rigauxi n. sp." = Leptodesma (Leiopteria)1 oyster
 Cardiiformii -
"Modiomorphoida indet." = Modiomorphida1
"Modiomorphoida indet." = Modiomorphida1 Newell 1969 clam
 Protobranchia - Malletiidae