Cliffs of Postolonnec (Postollonec), Crozon Peninsula (Ordovician of France)

Also known as Llandeilan (Morgat?) schistes Fm., Crozon Peninsula, Finistere, France

Where: Finistere, France (48.3° N, 4.5° W: paleocoordinates 68.9° S, 69.0° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Schistes de Morgat Formation, Dobrotivian (459.0 - 457.9 Ma)

• Formation known as "Llandeilan schistes," but probably formally the "Schistes de Morgat"

•

• formation-level stratigraphic resolution

Environment/lithology: offshore; lithified, bioturbated, concretionary, pyritic, sandy shale

• Dark shale with fine laminations and occasional lenticles, bioturbation, sand, and pyrite

Size class: macrofossils

Primary reference: J. Nion and J. L. Henry. 1966. Phacopidella (Prephacopidella) hupei nov. sp., nouveau trilobite de l'ordovicien du Finistere. Bulletin de la Societe Geologique de France 8(6):884-890 [A. Miller/P. Novack-Gottshall/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 20865: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 11.06.2002, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

• Primarily bivalve and trilobite taxonomy and biostrat.
Show authors, comments, and common names
Hyolitha
 Hyolithida - Hyolithidae
Hyolithes sp.
Hyolithes sp. d'Eichwald 1840
Bivalvia
 Nuculanida - Malletiidae
Palaeoneilo hopensacki
Palaeoneilo hopensacki de Verneuil and Barrande 1855 clam
 Solemyida - Ctenodontidae
Ctenodonta bussacensis, Ctenodonta ribeiroi
Ctenodonta bussacensis Sharpe 1853 clam
Ctenodonta ribeiroi Sharpe 1853 clam
 Actinodontida - Cycloconchidae
? Actinodonta naranjoana
? Actinodonta naranjoana de Verneuil and Barrande 1855 clam
Trilobita
 Phacopida - Homalonotidae
? Calymenella (Eohomalonotus) sp., Plaesiacomia oehlerti
? Calymenella (Eohomalonotus) sp. Bergeron 1890 trilobite
Plaesiacomia oehlerti Kerforne 1900 trilobite
 Phacopida - Calymenidae
Neseuretus tristani
Neseuretus tristani Brongniart in Desmarest 1817 trilobite
 Phacopida - Phacopidae
Phacopidella (Prephacopidella) hupei
Phacopidella (Prephacopidella) hupei Nion and Henry 1966 trilobite
 Phacopida - Dalmanitidae
Crozonaspis kerfornei
Crozonaspis kerfornei Clarkson and Henry 1969 trilobite
 Phacopida - Acastidae
"Kloucekia cf. micheli" = Phacopidina micheli
"Kloucekia cf. micheli" = Phacopidina micheli Tromelin 1877 trilobite
 Phacopida - Pliomeridae
"Placoparia tourneminei" = Placoparia (Coplacoparia) tournemini
"Placoparia tourneminei" = Placoparia (Coplacoparia) tournemini Rouault 1847 trilobite