The Lotena Formation is a geologic formation dated from the Late Callovian to Early Oxfordian in the

Neuquén Basin Neuquén Basin () is a sedimentary basin covering most of Neuquén Province in Argentina. The basin originated in the Jurassic and developed through alternating continental and marine conditions well into the Tertiary. The basin bounds to the wes ...

Mendoza Province Mendoza (), officially the Province of Mendoza, is a province of Argentina, in the western central part of the country in the Cuyo region. It borders San Juan to the north, La Pampa and Neuquén to the south, San Luis to the east, and the r ...

Argentina Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourt ...

.Lotena Formation
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 ...

.org The formation, first defined by Weaver in 1931 and named after Cerro Lotena,Zanettini et al., 2010, p.25 consists of fluvial conglomerates,

calcareous Calcareous () is an adjective meaning "mostly or partly composed of calcium carbonate", in other words, containing lime (mineral), lime or being chalky. The term is used in a wide variety of Science, scientific disciplines. In zoology ''Calcare ...

sandstone Sandstone is a Clastic rock#Sedimentary clastic rocks, clastic sedimentary rock composed mainly of grain size, sand-sized (0.0625 to 2 mm) silicate mineral, silicate grains, Cementation (geology), cemented together by another mineral. Sand ...

s and marine

limestone Limestone is a type of carbonate rock, carbonate sedimentary rock which is the main source of the material Lime (material), lime. It is composed mostly of the minerals calcite and aragonite, which are different Polymorphism (materials science) ...

s and

shale Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of Clay mineral, clay minerals (hydrous aluminium phyllosilicates, e.g., Kaolinite, kaolin, aluminium, Al2Silicon, Si2Oxygen, O5(hydroxide, OH)4) and tiny f ...

s.Veiga et al., 2011, p.174 The Lotena Formation is overlain by the

La Manga Formation LA most frequently refers to Los Angeles, the second most populous city in the United States of America. La, LA, or L.A. may also refer to: Arts and entertainment Music *La (musical note), or A, the sixth note *"L.A.", a song by Elliott Smit ...

and overlies the Lajas Formation of the Cuyo Group.Veiga et al., 2011, p.178 Initially, the fossil find of the

pterosaur Pterosaurs are an extinct clade of flying reptiles in the order Pterosauria. They existed during most of the Mesozoic: from the Late Triassic to the end of the Cretaceous (228 million to 66 million years ago). Pterosaurs are the earli ...

'' Herbstosaurus pigmaeus'' was reported from the formation,Wellnhofer, 1991, p.81 but this fossil was found in the younger

Vaca Muerta The Vaca Muerta Formation, commonly known as Vaca Muerta ( Spanish for ''dead cow''), is a geologic formation of Late Jurassic to Early Cretaceous age, located in the Neuquén Basin in northern Patagonia, Argentina. It is well known as the host ...

.''Herbstosaurus''
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.org The formation is a

reservoir rock A petroleum reservoir or oil and gas reservoir is a subsurface accumulation of hydrocarbons contained in porous or fractured rock formations. Such reservoirs form when kerogen (ancient plant matter) is created in surrounding rock by the presenc ...

in the Neuquén Basin.

References

Bibliography

* * * {{citation , last1=Zanettini , first1=Juan Carlos M. , last2=Leanza , first2=Héctor A. , last3=Giusiano , first3=Adolfo , year=2010 , title=Programa Nacional de Cartas Geológicas de la República Argentina 1:250,000 - Hoja Geológica 3972-II Loncopué , url=https://www.researchgate.net/publication/262934512 , publisher=SEGEMAR , pages=1–93 , accessdate=2017-08-03 Geologic formations of Argentina Late Jurassic South America Middle Jurassic South America Jurassic System of South America Jurassic Argentina Callovian Stage Oxfordian Stage Conglomerate formations Sandstone formations Shale formations Limestone formations Fluvial deposits Reservoir rock formations Formations Geology of Mendoza Province Geology of Neuquén Province Geology of Patagonia

See also

References

Bibliography