The Calcare di Cellina (Italian for Cellina Limestone, is a

Hauterivian The Hauterivian is, in the geologic timescale, an age in the Early Cretaceous Epoch or a stage in the Lower Cretaceous Series. It spans the time between 132.6 ± 2 Ma and 125.77 (million years ago). The Hauterivian is preceded by the Valangi ...

Aptian The Aptian is an age (geology), age in the geologic timescale or a stage (stratigraphy), stage in the stratigraphic column. It is a subdivision of the Early Cretaceous, Early or Lower Cretaceous epoch (geology), Epoch or series (stratigraphy), S ...

geologic

formation Formation may refer to: Linguistics * Back-formation, the process of creating a new lexeme by removing or affixes * Word formation, the creation of a new word by adding affixes Mathematics and science * Cave formation or speleothem, a secondary ...

in Friulia-Venezia Giulia, Italy.Calcare di Cellina
at

Fossilworks Fossilworks was a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database, a large relational database assembled by hundreds of paleontologists from around the world. History Fossilworks was cr ...

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sauropod Sauropoda (), whose members are known as sauropods (; from '' sauro-'' + '' -pod'', 'lizard-footed'), is a clade of saurischian ('lizard-hipped') dinosaurs. Sauropods had very long necks, long tails, small heads (relative to the rest of their b ...

tracks have been reported from the formation.Weishampel et al., 2004, pp.517-607

Description

The Calcare di Cellina comprises a limestone facies corresponding to the peritidal successions of the inner part of the Periadriatic carbonate platforms. The layer in which the tracks were found is characterized by intertidal muds which were later covered and sealed by a transgressive subtidal layer, representing a moderately more open but low energy environment. Most of the limestone blocks show similar lithofacies, with bed thickness exceeding a metre, the presence of occasional

stylolite Stylolites (Greek: ''stylos'', pillar; ''lithos'', stone) are serrated surfaces within a rock mass at which mineral material has been removed by pressure dissolution, in a deformation process that decreases the total volume of rock. Minerals wh ...

s and rare requienids; the bed surfaces present mud cracks, bioturbation due to burrowing organisms and pedogenetic breccias (sometimes with black pebbles). The color ranges from whitish through light brown to pale pink. The blocks sometimes present desiccation structures (mud cracks, birdseyes) and mostly comprise muddy facies, often with

ostracod Ostracods, or ostracodes, are a Class (biology), class of the crustacean, Crustacea (class Ostracoda), sometimes known as seed shrimp. Some 33,000 species (only 13,000 of which are extant taxon, extant) have been identified,Brandão, S.N.; Antoni ...

s. In contrast, the level with the footprint is a fossiliferous wackestone (with foraminifers and ostracods), with no traces of subaerial exposure.

Fossil content

The following fossils were reported from the formation: ;Ichnofossils * Carnosauria indet. * Sauropoda indet. * ?Dinosauria indet.Venturini, 1995 ;Foraminifera * '' Campanellula capuensis'' ;Flora * '' Salpingoporella dinarica''

References

Bibliography

* * * {{citation , last=Venturini , first=S , year=1995 , title=Segnalazione di un livello marnoso a characee con presunte impronte di dinosauro nell'Aptiano del M. Bernadia (Nimis, Udine) - Notice of a marly characeous level with presumed dinosaur prints in the Aptian of Monte Bernadia (Nimis, Udine) , journal= Natura Nascosta , volume=11 , pages=36–37 Geologic formations of Italy Lower Cretaceous Series of Europe Cretaceous Italy Aptian Stage Barremian Stage Hauterivian Stage Limestone formations Paludal deposits Ichnofossiliferous formations Paleontology in Italy

Description

Fossil content

See also

References

Bibliography