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The formation is fossiliferous, with Dinosaurs and Crocodyliformes being known from the formation.
Geology
Lithology
The Lithology of the formation is a sequence of red, pink, purple and occasionally white colored sandstones, conglomerates and mudstones. The Mtuka member is 160–180 m thick in the type section, and is typified by coarser sandstone, a higher frequency of conglomerates, higher proportions of extraformational clasts, thicker and a greater frequency of overbank siltstone and mudstone lenses and a higher proportion of paleosols. While the Namba member is between 340–360 m in the type section, and is less variable in facies, predominated by very fine-to medium-grained sandstones with less overbank mudstone and siltstone lenses.[1]
^ abRoberts, Eric M.; O’Connor, Patrick M.; Stevens, Nancy J.; Gottfried, Michael D.; Jinnah, Zubair A.; Ngasala, Sifael; Choh, Adeline M.; Armstrong, Richard A. (May 2010). "Sedimentology and depositional environments of the Red Sandstone Group, Rukwa Rift Basin, southwestern Tanzania: New insight into Cretaceous and Paleogene terrestrial ecosystems and tectonics in sub-equatorial Africa". Journal of African Earth Sciences. 57 (3): 179–212. Bibcode:2010JAfES..57..179R. doi:10.1016/j.jafrearsci.2009.09.002. ISSN1464-343X.
^Widlansky, Sarah J.; Clyde, William C.; O'Connor, Patrick M.; Roberts, Eric M.; Stevens, Nancy J. (March 2018). "Paleomagnetism of the Cretaceous Galula Formation and implications for vertebrate evolution". Journal of African Earth Sciences. 139: 403–420. Bibcode:2018JAfES.139..403W. doi:10.1016/j.jafrearsci.2017.11.029. ISSN1464-343X.
^ abcdeO’Connor, Patrick M.; Sertich, Joseph J. W.; Stevens, Nancy J.; Roberts, Eric M.; Gottfried, Michael D.; Hieronymus, Tobin L.; Jinnah, Zubair A.; Ridgely, Ryan; Ngasala, Sifa E. (August 2010). "The evolution of mammal-like crocodyliforms in the Cretaceous Period of Gondwana". Nature. 466 (7307): 748–751. Bibcode:2010Natur.466..748O. doi:10.1038/nature09061. ISSN0028-0836. PMID20686573. S2CID4405106.
^ abcdeSertich, Joseph J. W.; O’Connor, Patrick M. (2014-04-16). "A new crocodyliform from the middle Cretaceous Galula Formation, southwestern Tanzania". Journal of Vertebrate Paleontology. 34 (3): 576–596. doi:10.1080/02724634.2013.819808. ISSN0272-4634. S2CID16644660.
^ abcdefghiGorscak, Eric; O'Connor, Patrick M.; Roberts, Eric M.; Stevens, Nancy J. (2017-07-04). "The second titanosaurian (Dinosauria: Sauropoda) from the middle Cretaceous Galula Formation, southwestern Tanzania, with remarks on African titanosaurian diversity". Journal of Vertebrate Paleontology. 37 (4): e1343250. doi:10.1080/02724634.2017.1343250. ISSN0272-4634. S2CID90885040.
^Gorscak, Eric; O'Connor, Patrick M.; Stevens, Nancy J.; Roberts, Eric M. (2014-07-29). "The basal titanosaurianRukwatitan bisepultus(Dinosauria, Sauropoda) from the middle Cretaceous Galula Formation, Rukwa Rift Basin, southwestern Tanzania". Journal of Vertebrate Paleontology. 34 (5): 1133–1154. doi:10.1080/02724634.2014.845568. ISSN0272-4634. S2CID677002.
^ abO’Connor, Patrick M.; Gottfried, Michael D.; Stevens, Nancy J.; Roberts, Eric M.; Ngasala, Sifa; Kapilima, Saidi; Chami, Remigius (March 2006). "A new vertebrate fauna from the Cretaceous Red Sandstone Group, Rukwa Rift Basin, Southwestern Tanzania". Journal of African Earth Sciences. 44 (3): 277–288. Bibcode:2006JAfES..44..277O. doi:10.1016/j.jafrearsci.2005.11.022. ISSN1464-343X.
^KRAUSE, DAVID W.; GOTTFRIED, MICHAEL D.; O’CONNOR, PATRICK M; ROBERTS, ERIC M. (2003). "A Cretaceous mammal from Tanzania"(PDF). Acta Palaeontologica Polonica. 48 (3): 321–330.