Английская Википедия:Dos Bocas Formation
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The Dos Bocas Formation is a sedimentary geological formation of the Progreso Basin in southwestern Ecuador. It is dated to the Chattian, about 26 to 24 Ma, (Deseadan in the SALMA classification).
Description
The formation comprises moderately-sorted, fine to medium sandstones with angular quartz-feldspathic clasts. Conspicuous rounded green grains are probably glauconite, but berthierine cannot be dismissed. The matrix is micritic and volcanogenic, possibly bentonitic. The formation was deposited in an estuarine to mid shelf environment. Fossils of sharks, turtles and the tropical dolphin Urkudelphis were recovered from the formation.[1][2]
Fossil content
The formation has provided fossils of:
See also
- List of fossiliferous stratigraphic units in Ecuador
- Bahía Inglesa Formation
- Coquimbo Formation
- Pisco Formation
References
Категории:
- Английская Википедия
- Страницы с неработающими файловыми ссылками
- Geologic formations of Ecuador
- Oligocene Series of South America
- Paleogene Ecuador
- Chattian Stage
- Deseadan
- Sandstone formations
- Tidal deposits
- Open marine deposits
- Paleontology in Ecuador
- Geography of Santa Elena Province
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
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