The Itombe Formation is a geological formation of the Kwanza Basin in Angola dated to the Coniacian stage of the Late Cretaceous. The environment of deposition is shallow marine. Reptile fossils have been recovered from the Tadi beds locality within the formation, including the dinosaur Angolatitan,[1] the mosasaurs Angolasaurus and Mosasaurus iembeensis and the turtle Angolachelys.[2] The Itombe formation was formerly considered Turonian in age, but new data suggests to be Coniacian.[3]
| Itombe Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Sub-units | Tadi Beds |
| Underlies | N'Golome Marl |
| Overlies | Cabo Ledo & Massangano Formations |
| Thickness | up to 600 m (2,000 ft) |
| Lithology | |
| Primary | Shale |
| Other | Limestone, siltstone, sandstone |
| Location | |
| Coordinates | 8°12′S 13°12′E / 8.2°S 13.2°E |
| Approximate paleocoordinates | 23°00′S 1°24′E / 23.0°S 1.4°E |
| Region | Bengo |
| Country | Angola |
| Extent | Kwanza Basin |
  Itombe Formation (Angola) | |
See also edit
References edit
- ^ Mateus, Octávio; Jacobs, Louis L.; Schulp, Anne S.; Polcyn, Michael J.; Tavares, Tatiana S.; Buta Neto, André; Morais, Maria Luísa; Antunes, Miguel T. (March 2011). "Angolatitan adamastor, a new sauropod dinosaur and the first record from Angola". Anais da Academia Brasileira de Ciências. 83 (1): 221–233. doi:10.1590/S0001-37652011000100012. ISSN 0001-3765. PMID 21437383.
- ^ Mateus, Octávio; Jacobs, Louis; Polcyn, Michael; Schulp, Anne S.; Vineyard, Diana; Buta Neto, André; Telles Antunes, Miguel (December 2009). "The Oldest African Eucryptodiran Turtle from the Cretaceous of Angola". Acta Palaeontologica Polonica. 54 (4): 581–588. doi:10.4202/app.2008.0063. ISSN 0567-7920.
- ^ Mateus, Octávio; Callapez, Pedro M.; Polcyn, Michael J.; Schulp, Anne S.; Gonçalves, António Olímpio; Jacobs, Louis L. (2019). "The Fossil Record of Biodiversity in Angola Through Time: A Paleontological Perspective". Biodiversity of Angola. Springer International Publishing. pp. 53–76. doi:10.1007/978-3-030-03083-4_4. ISBN 978-3-030-03082-7. S2CID 133717540.
Further reading edit
- M. T. Antunes. 1964. O Neocretacio e o Cenozoico do litoral de Angola. Junta de Investigcoes do Ultramar 1-254