Dos Bocas Formation
The Dos Bocas Formation is a Chattian, about 26 to 24 Ma, geologic formation of the Progreso Basin in southwestern Ecuador.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 Urkudelphis were recovered from the formation.The formation has provided fossils of:
