Etrochey Oxfordian vertebrate layer (Côte-d'Or) (Jurassic of France)

Also known as Bourgogne, Burgandy, Cote-d'Or

Where: Bourgogne, France (47.9° N, 4.6° E: paleocoordinates 38.7° N, 13.9° E)

• local area-level geographic resolution

When: Middle Oxfordian (161.2 - 155.7 Ma)

• Plicatilis zone

•The ferruginous oolite immediately overlies the Callovian limestones of the Dalle nacrée, but is separated by an important gap [unconformity]. Mixed muds/marl overlie the oolite.

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, ferruginous, ooidal, gray, blue limestone

• "infratidal"
• A veritable conglomeration of fossils, some decimeters of ferruginous "calcaires" and marls. Referred to as a ferrugionous oolite. Very hard, bluish gray, micritic, iron oxides, aleropelitiques aggregates, oolites, rare bioclasts (Entroques=crinoid stems and pelecypods).

Size class: macrofossils

Collection methods: Etrochey specimens are from the collection of J. Beaudoin. Localities around Dijon also yield typical invertebrates and possibly vertebrates - those specimens are not listed specifically but are said to be housed in the Collection of l'Institut des Sciences de la Terre de l'Université de Dijon.

Primary reference: E. Buffetaut and J. Thierry. 1977. Les Crocodiliens fossiles du Jurassique moyen et superieur de Bourgogne. [The fossil crocodilians from the Middle and Upper Jurassic layers of Burgundy]. Géobios 10(2):151-193 [J. Alroy/R. Whatley/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 36568: authorized by John Alroy, entered by Robin Whatley on 04.02.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Fossils other than vertebrates are the listed as occurring in the ferruginous oolite.
 Foraminifera -
Pelecypoda
  -
Pelecypoda indet. Goldfuss 1820
Lamellibranches
Cephalopoda
 Belemnoidea -
Belemnitida indet. Zittel 1895 belemnite
Belemnites
 Ammonoidea -
Ammonoidea indet. ammonite
Ammonites
Reptilia
 Loricata -
"Crocodilia indet." = Crocodylia
"Crocodilia indet." = Crocodylia Owen 1842 crocodilian
dermal scutes and other isolated bones, mostly vertebral elements
 Loricata - Teleosauridae
Steneosaurus heberti Morel de Glasville 1876 marine crocodile
 Loricata - Metriorhynchidae
Metriorhynchus sp. von Meyer 1830 marine crocodile
 Plesiosauria -
Plesiosauria indet. plesiosaur
many fragments
 Ichthyosauria -
Ichthyosauria indet. ichthyosaur
many fragments
unclassified
  -
Echinodermata indet. Klein 1754
Entroques
Plantae indet. Haeckel 1866
fragments of carbonized wood