Английская Википедия:Corda Formation
Шаблон:Short description Шаблон:Infobox rockunit
The Corda Formation is a red sandstone geologic formation in the Parnaíba Basin in Tocantins, Brazil. It was formed during the Neoaptian to Eoalbian series of the Early Cretaceous.
Large-scale fossil sauropod tracks have been reported from the formation.[1][2][3][4]
Origin
The Corda Formation is characterized by reddish sandstones, that were probably deposited in windy deserts and fast flowing freshwater streams. Therefore, fossils are very rare.[1]
Occurrence
This formation outcrops in the central part of the Parnaíba Basin, between the mouth of the Araguaia River in the west the Parnaíba River in the east.[1]
Lithology
The Corda Formation consists largely of red sandstone, with very fine to medium grain size, rich in zeolites and iron oxide. Where whinstonesШаблон:Clarify are overlaying fragments of this rock are also present. Typical structures of wind dunes (cross bedding, ripples, and grain flow) are common. This is consistent with deposition in a desert system.[1]
See also
- List of dinosaur-bearing rock formations
- Sauropod tracks
- Romualdo Formation, contemporaneous fossiliferous formation of the Araripe Basin
- Itapecuru Formation, contemporaneous fossiliferous formation of the São Luis and Parnaíba Basins
References
Bibliography
- Английская Википедия
- Geologic formations of Brazil
- Lower Cretaceous Series of South America
- Cretaceous Brazil
- Albian Stage
- Aptian Stage
- Sandstone formations
- Fluvial deposits
- Ichnofossiliferous formations
- Fossiliferous stratigraphic units of South America
- Paleontology in Brazil
- Geography of Tocantins
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
