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Fossil deposits in France From Wikipedia, the free encyclopedia
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]
This article may be too technical for most readers to understand. (June 2022) |
Canjuers Lagerstätte | |
---|---|
Stratigraphic range: | |
Type | Konservat-Lagerstätte |
Unit of | Calcaires blancs de Provence |
Underlies | Biomicrites de Sainte-Croix |
Thickness | 12 m |
Lithology | |
Primary | Lithographic limestone |
Other | Chert |
Location | |
Coordinates | 43.708695°N 6.374173°E |
Region | Provence-Alpes-Côte d'Azur |
Country | France |
Type section | |
Named for | Canjuers plateau |
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 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]
Genus[1] | Species | Order | Family | Images |
---|---|---|---|---|
Caturus | C. sp. | Amiiformes | Caturidae | |
Eugnathus | E. sp. | Amiiformes | Caturidae | |
Gyrodus | G. sp. | Pycnodontiformes | Gyrodontidae | |
Proscinetes | P. sp. | Pycnodontiformes | Pycnodontidae | |
Pachycormidae | Pachycormiformes | Pachycormidae | ||
Pholidophorus | P. sp. | Pholidophoriformes | Pholidophoridae | |
Leptolepis | L. sp. | Leptolepiformes | Leptolepidae | |
Tharsis | T. sp. | Leptolepiformes | Leptolepidae | |
Ophiopsis | O. sp. | Ionoscopiformes | Ophiopsidae | |
Elopidae | Elopiformes | Elopidae | ||
Lepidotes | L. sp. | Lepisosteiformes | Lepidotidae | |
Belonostomus | B. sp. | Aspidorhynchiformes | Aspidorhynchidae | |
Naiathelon | N. okkidion | Elopomorpha |
Genus[1] | Species | Order | Family | Images |
---|---|---|---|---|
Undina | U. sp. | Actinistia | ||
Coccoderma | C. sp. | Actinistia |
Genus[1] | Species | Order | Family | Images |
---|---|---|---|---|
Palaeocarcharias | P. sp. | Lamniformes |
Genus[1] | Species | Order | Family | Images |
---|---|---|---|---|
Solnhofia | S. sp. | Chelonia | Plesiochelydae | |
Eurysternum | E. sp. | Chelonia | Eurysternidae | |
Pleurosaurus | P. ginsburgi | Rhynchocephalia | Pleurosauridae | |
P. goldfussi | Rhynchocephalia | Pleurosauridae | ||
Homoeosaurus | H. maximiliani | Rhynchocephalia | Sphenodontidae | |
Leptosaurus | L. pulchellus | Rhynchocephalia | Sphenodontidae | |
Piocormus | P. laticeps | Rhynchocephalia | Sphenodontidae | |
Aeolodon | A. priscus | Mesoeucrocodylia | Teleosauridae | |
Cycnorhamphus | C. suevicus | Pterosauria | Gallodactylidae | |
Compsognathus | C. longipes | Dinosauria | Compsognathidae |
Genus[1] | Species | Order | Family | Images |
---|---|---|---|---|
Plegiocidaris | P. marginata | Echinoidea | Cidaroida | |
Rhabdocidaris | R. nobilis | Echinoidea | Cidaroida | |
Diplocidaris | D. gigantea | Echinoidea | Cidaroida | |
Hemicidaris | H. crenularis | Echinoidea | Hemicidaroida | |
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 | |
Geocoma | G. canjuersensis | Ophiuroidea | Ophiuridae | |
G. aff. carinata | Ophiuroidea | Ophiuridae | ||
Amphiuridae | Ophiuroidea | Amphiuridae | ||
Ophiurella | O. aff. speciosa | Ophiuroidea | incertae sedis | |
Comaturella | C. pinnata | Crinoidea | Comatulida | |
Saccocoma | S. tenella | Crinoidea | Roveacrinida |
Genus[1] | Species | Order | Family | Images |
---|---|---|---|---|
Torquirhynchia | T. guebhardi | Rhynchonellida | ||
Septaliphoria | S. obtusa | Rhynchonellida | ||
Somalirhynchia ? | S. sp. | Rhynchonellida | ||
Juralina | J. insignis' | Terebratulida | ||
Moeschia | M. aff. foraminata | Terebratulida | ||
Ismenia | I. pectunculoides | Terebratulida | ||
"Zeilleria" | Z. aff. pentagonalis | Terebratulida |
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 |
Genus | Species | Order | Family | Images |
---|---|---|---|---|
Cycleryon | C. bourseaui[5] | Decapoda | ||
Kouphichnium[1] | K. lithographicum | Chelicerata | Xiphosura |
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