Английская Википедия:Canjuers Lagerstätte

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The Canjuers Lagerstätte is a Konservat-Lagerstätte located inside the military camp of Canjuers, in Haute Provence, in the Var department in South-East France.[1]

Geology and stratigraphy

From a stratigraphic point of view, this fossil deposit is located inside the Calcaires blancs de Provence geological formation, a 200-meter-thick limestone assemblage. The lithographic limestone of Canjuers, which bears almost all significant fossils from the Lagerstätte, is a thin layer (around 6 meters) at the basis of the Biomicrites de Sainte-Croix member, the later member of the Calcaires blancs de Provence.[2] This layer has been dated by ammonite analysis to the Lower Tithonian (Neochetoceras mucronatum biozone[3]), around 150 Mya.

The Canjuers site facies outcrop in the Petit Plan de Canjuers plateau, and a quarry was exploited in the locality "Les Bessons". They correspond to deposits inside a sub-circular depression whose area is estimated to be only 1 km2.[1] Their total thickness is around 12 m. They are divided in three lithologic units, from bottom to top :

  • The lithographic limestone per se, made of thin limestone, finely laminated, around 6 m thick. Those bears almost every remarkable fossils from the site (Lagerstätte).
  • Bioclastic limestone 4.5 m thick. Those are packstone or grainstone limestone, with chert nodule levels. Their bioclasts are made of corals, sea urchins, bivalves, brachiopods and sponges fragments, with burrows and some plant remains. The banks show quasi-planar oblique surface.
  • The sub-lithographic limestone with chert nodule levels, 1.5 m wide, in thick banks perforated by burrows attributed to the ichnotaxon Tubularina lithographica.[4]

Paleoenvironment

The lithographic limestone deposit environment was protected from the Tethys Ocean open sea by a continuous reef barrier. The lithographic limestone was deposited in a large lagoon whose various parts were successively above and below water, and where several small coral islands emerged. Meteoric water supplies are likely.[3]

Paleontology

Actinopterygians

Genus[1] Species Order Family Images
Caturus C. sp. Amiiformes Caturidae
Файл:Caturus furcatus 337.jpg
Eugnathus E. sp. Amiiformes Caturidae
Gyrodus G. sp. Pycnodontiformes Gyrodontidae
Файл:Gyrodus sp 66.jpg
Proscinetes P. sp. Pycnodontiformes Pycnodontidae
Файл:Proscinetes cf elegans.jpg
Pachycormidae Pachycormiformes Pachycormidae
Pholidophorus P. sp. Pholidophoriformes Pholidophoridae
Leptolepis L. sp. Leptolepiformes Leptolepidae
Файл:Leptolepis coryphaenoides.jpg
Tharsis T. sp. Leptolepiformes Leptolepidae
Ophiopsis O. sp. Ionoscopiformes Ophiopsidae
Файл:Ophiopsis muensteri 6788.jpg
Elopidae Elopiformes Elopidae
Lepidotes L. sp. Lepisosteiformes Lepidotidae
Файл:Lepidotes gigas Holzmaden.jpg
Belonostomus B. sp. Aspidorhynchiformes Aspidorhynchidae
Файл:Belonostomus tenuirostris Ob Jura Painten D Ch2.jpg
Naiathelon N. okkidion Elopomorpha

Sarcopterygians

Genus[1] Species Order Family Images
Undina U. sp. Actinistia
Файл:Undina penicillata Ob Jura Painten D Ch1855.jpg
Coccoderma C. sp. Actinistia
Файл:Coccoderma bavaricum Reil, 1888.jpg

Chondrichthyans

Genus[1] Species Order Family Images
Palaeocarcharias P. sp. Lamniformes

Reptiles

Genus[1] Species Order Family Images
Solnhofia S. sp. Chelonia Plesiochelydae
Eurysternum E. sp. Chelonia Eurysternidae
Файл:Eurysternum 1.JPG
Pleurosaurus P. ginsburgi Rhynchocephalia Pleurosauridae
Файл:Canjuers fossiles04.jpg
P. goldfussi Rhynchocephalia Pleurosauridae
Файл:Pleurosaurus goldfussi 678e.jpg
Homoeosaurus H. maximiliani Rhynchocephalia Sphenodontidae
Файл:Naturkundemuseum Berlin - Homoeosaurus maximiliani - Solnhofen.jpg
Leptosaurus L. pulchellus Rhynchocephalia Sphenodontidae
Piocormus P. laticeps Rhynchocephalia Sphenodontidae
Aeolodon A. priscus Mesoeucrocodylia Teleosauridae
Файл:Aeolodon.png
Cycnorhamphus C. suevicus Pterosauria Gallodactylidae
Файл:Cycnorhamphus.jpg
Compsognathus C. longipes Dinosauria Compsognathidae
Файл:Canjuers fossiles03.jpg

Echinoderms

Genus[1] Species Order Family Images
Plegiocidaris P. marginata Echinoidea Cidaroida
Rhabdocidaris R. nobilis Echinoidea Cidaroida
Diplocidaris D. gigantea Echinoidea Cidaroida
Файл:Diplocidaridae - Diplocidaris gigantea.JPG
Hemicidaris H. crenularis Echinoidea Hemicidaroida
Файл:Hemicidaris intermedia Cosmocaixa.JPG
Acrocidaris A. nobilis Echinoidea Hemicidaroida
Hessotiara H. florescens Echinoidea Hemicidaroida
Pseudosalenia P. aspera Echinoidea Salenioida
Pleurodiadema P. stutzi Echinoidea Phymosomatoida
Acropeltis A. aequituberculata Echinoidea Arbacioida
Magnosia M. nodulosa Echinoidea Arbacioida
Pentasteria P. sp. Asteroidea Paxillosida
Файл:Pentasteria longispina, starfish, Early Late Jurassic, Oxfordian Age, Switzerland - Houston Museum of Natural Science - DSC01811.JPG
Geocoma G. canjuersensis Ophiuroidea Ophiuridae
G. aff. carinata Ophiuroidea Ophiuridae
Файл:Geocoma carinata 1.JPG
Amphiuridae Ophiuroidea Amphiuridae
Ophiurella O. aff. speciosa Ophiuroidea incertae sedis
Comaturella C. pinnata Crinoidea Comatulida
Saccocoma S. tenella Crinoidea Roveacrinida
Файл:Saccocoma2.jpg

Brachiopods

Genus[1] Species Order Family Images
Torquirhynchia T. guebhardi Rhynchonellida
Septaliphoria S. obtusa Rhynchonellida
Somalirhynchia ? S. sp. Rhynchonellida
Файл:Sonalirhynchia brachial valve.jpg
Juralina J. insignis' Terebratulida
Moeschia M. aff. foraminata Terebratulida
Ismenia I. pectunculoides Terebratulida
"Zeilleria" Z. aff. pentagonalis Terebratulida

Molluscs

Genus[1] Species Order Family Images
Modiolus M. imbricatus Bivalvia
Entolium E. corneolum Bivalvia
Chlamys C. textoria Bivalvia
Spondylopecten S. subpunctatus Bivalvia
Nanogyra N. striata Bivalvia
Actinostreon A. gregareum Bivalvia
Dorsoplanitoides D. triplicatus Cephalopoda
Usseliceras U. (Subplanitoides) altegyratum Cephalopoda
U. (Subplanitoides) aff. spindelense Cephalopoda
U. (Subplanitoides) cf. schwertschlageri Cephalopoda
U. (Usseliceras) cf. franconicum Cephalopoda
Hibolites H. sp. Cephalopoda
Файл:Hibolites hastatus.JPG

Crustaceans

Genus Species Order Family Images
Cycleryon C. bourseaui[5] Decapoda
Kouphichnium[1] K. lithographicum Chelicerata Xiphosura

References

Шаблон:Reflist