Itombe Formation

Itombe Formation
Itombe Formation
Stratigraphic range: Coniacian PreꞒ Ꞓ O S D C P T J K Pg N ↓
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)

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]

References

^ 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.