The Calcare di Sogno ("Sogno Limestone"; also known as the Sogno Formation) is a

geological formation A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exp ...

Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical re ...

, dated to roughly between 183-181

million years ago The abbreviation Myr, "million years", is a unit of a quantity of (i.e. ) years, or 31.556926 teraseconds. Usage Myr (million years) is in common use in fields such as Earth science and cosmology. Myr is also used with Mya (million years ago). ...

and covering the

Toarcian The Toarcian is, in the ICS' geologic timescale, an age and stage in the Early or Lower Jurassic. It spans the time between 182.7 Ma (million years ago) and 174.1 Ma. It follows the Pliensbachian and is followed by the Aalenian. The Toarcian ...

stages Stage or stages may refer to: Acting * Stage (theatre), a space for the performance of theatrical productions * Theatre, a branch of the performing arts, often referred to as "the stage" * ''The Stage'', a weekly British theatre newspaper * S ...

of the

Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The J ...

Period in the

Mesozoic Era The Mesozoic Era ( ), also called the Age of Reptiles, the Age of Conifers, and colloquially as the Age of the Dinosaurs is the second-to-last Era (geology), era of Earth's Geologic time scale, geological history, lasting from about , comprising ...

.CARTA GEOLOGICA D’ITALIA 1:50.000 - CATALOGO DELLE FORMAZIONE. Formazione di Sogno.SERVIZIO GEOLOGICO - CONSIGLIO NAZIONALE DELLE RICERCHE - COMMISSIONE ITALIANA DI STRATIGRAFIA: http://www.isprambiente.gov.it/files/pubblicazioni/periodicitecnici/quaderni-sgi/quad7/form5.pdf Thallatosuchian remains are known from the formation.

Description

The formation is characterized by a disposition of regional deposition equivalent to the German

Posidonia Shale The Posidonia Shale (german: Posidonienschiefer, also called Schistes Bitumineux in Luxembourg) geologically known as the Sachrang Formation, is an Early Jurassic (Toarcian) geological formation of southwestern and northeast Germany, northern Swit ...

, with a benthonic setting and deposition trends, mostly populated by marine fauna.GAETANI M. & POLIANI G. (1978) - Il Toarciano ed il Giurassico medio in Albenza (Bergamo). Riv. It. Pal. Strat., 84 (2): 349-382, 5 figg., 2 tavv., Milano. The environment of the formation was related to a marginal marine deposit, with probably epicontinetal deposition from near land environments, being connected to the central European seas of the Toarcian.BERSEZIO R., JADOUL F. & CHINAGLIA N. (1997) - Geological map of the Norian-Jurassic succession of Southern Alps north of Bergamo: explanatory notes. Boll. Soc. Geol. It., 116 (2): 363-378, 1 carta geol., Roma

Fossil content

Flora

Several plant leaves and fragments of wood were not identified.

Molluscs

Arthropods

Fish

Crocodyliformes

Whitby Mudstone The Whitby Mudstone is a Toarcian (Early Jurassic; ''Falciferum''-''Bifrons'' in regional chronostratigraphy) geological formation in Yorkshire and Worcestershire, England.Fernie Formation The Fernie Formation is a stratigraphic unit of Jurassic age. It is present in the western part of the Western Canada Sedimentary Basin in western Alberta and northeastern British Columbia.Poulton, T.P., Tittemore, J. and Dolby, G. 1990. Jurassic ...

, Alberta and British Columbia ***

Poker Chip Shale The Fernie Formation is a stratigraphic unit of Jurassic age. It is present in the western part of the Western Canada Sedimentary Basin in western Alberta and northeastern British Columbia.Poulton, T.P., Tittemore, J. and Dolby, G. 1990. Jurassic ...

Whiteaves Formation The Whiteaves Formation is a geologic formation in British Columbia. It preserves fossils dating back to the Jurassic period. See also * List of fossiliferous stratigraphic units in Italy * Toarcian turnover * Toarcian formations ** Marne di M ...

, British Columbia **

Navajo Sandstone The Navajo Sandstone is a geological formation in the Glen Canyon Group that is spread across the U.S. states of southern Nevada, northern Arizona, northwest Colorado, and Utah as part of the Colorado Plateau province of the United States.Anonymou ...

, Utah **

Los Molles Formation The Los Molles Formation is a geologic formation of Early to Middle Jurassic age, located at northern and central part of Neuquén Basin at Mendoza Shelf in Argentina. It is overlain by the Niyeu–Lajas Formation.McIlroy et al., 2005 Descrip ...

, Argentina **

Mawson Formation The Mawson Formation is a geological formation in Antarctica, dating to roughly between 182 and 177 million years ago and covering the Toarcian stages of the Jurassic Period in the Mesozoic Era. Vertebrate remains are known from the formation. The ...

, Antarctica **

Kandreho Formation The Kandreho Formation is an Early Jurassic (middle or late Toarcian) geological formation of the Mahajanga Basin of Madagascar. The marly limestones of the formation were deposited in a subtidal lagoonal environment. The formation overlies the ...

, Madagascar **

Kota Formation The Kota Formation is a geological formation in India. The precise age of Kota Formation are uncertain, but it dates from the Early to Middle Jurassic, and is split into a Lower Member and Upper Member.Prasad GVR, and Manhas BK. 2007A new docodon ...

, India **

Cattamarra Coal Measures The Cattamarra Coal Measures is an Early Jurassic geological unit in Western Australia. Description They are part of the Perth Basin, and are a sequence of non-marine, probably fluvial sandstones, shales and silts including bituminous coal, an ...

, Australia

Notes and references

Notes

References

Bibliography

* {{DEFAULTSORT:Calcari Grigi Di Noriglio Formation Geologic formations of Italy Jurassic System of Europe Jurassic Italy Toarcian Stage Limestone formations Marl formations Shallow marine deposits Fossiliferous stratigraphic units of Europe Paleontology in Italy Formations