The Grès supérieurs Formation (French for "Upper sandstone") is a geological

formation Formation may refer to: Linguistics * Back-formation, the process of creating a new lexeme by removing or affixes * Word formation, the creation of a new word by adding affixes Mathematics and science * Cave formation or speleothem, a secondar ...

Laos Laos (, ''Lāo'' )), officially the Lao People's Democratic Republic ( Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ, French: République démocratique populaire lao), is a socialist ...

whose strata date back to the

Aptian The Aptian is an age in the geologic timescale or a stage in the stratigraphic column. It is a subdivision of the Early or Lower Cretaceous Epoch or Series and encompasses the time from 121.4 ± 1.0 Ma to 113.0 ± 1.0 Ma (million years ago), a ...

Albian The Albian is both an age of the geologic timescale and a stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early/Lower Cretaceous Epoch/Series. Its approximate time range is 113.0 ± 1.0 Ma to 100.5 ± 0.9 M ...

stages of the

Early Cretaceous The Early Cretaceous ( geochronological name) or the Lower Cretaceous (chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 145 Ma to 100.5 Ma. Geology Pro ...

. Dinosaur remains are among the fossils that have been recovered from the formation.Weishampel et al., pp.563-570 It is equivalent to the Khok Kruat Formation of

Thailand Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is bo ...

Fossil content

The Grès supérieurs Formation has also yielded remains of indeterminate iguanodontians, as well as

ornithopod Ornithopoda () is a clade of ornithischian dinosaurs, called ornithopods (), that started out as small, bipedal running grazers and grew in size and numbers until they became one of the most successful groups of herbivores in the Cretaceous world ...

and sauropod tracks.

Fish

Dinosaurs

;Other fossils * Sauropod tracks * Iguanodontia indet (=Mandschurosaurus laosensis) * Euornithopod tracks

References

Bibliography

* R. Allain, T. Xaisanavong, P. Richir and B. Khentavong. 2012. The first definitive Asian spinosaurid (Dinosauria: Theropoda) from the early cretaceous of Laos. Naturwissenschaften 99:369-377 * F. de Lapparent de Broin. 2004. A new Shachemydinae (Chelonii, Cryptodira) from the Lower Cretaceous of Laos: preliminary data. Comptes Rendus Palevol 3:387-396 * R. Allain, P. Taquet, B. Battail, J. Dejax, P. Richir, M. Véran, F. Limon-Duparcmeur, R. Vacant, O. Mateus, P. Sayarath, B. Khenthavong and S. Phouyavong. 1999. Un nouveau genre de dinosaure sauropode de la formation des Grès supérieurs (Aptien-Albien) du Laos new genus of sauropod dinosaur from the Grès supérieurs Formation (Aptian-Albian) of Laos Comptes Rendus de l'Académie des Sciences à Paris, Sciences de la Terre et des Planètes 329:609-616 * J.-H. Hoffet. 1942. Description de quelques ossements de Titanosauriens du Sénonien du Bas-Laos escription of some titanosaurian bones from the Senonian of Lower Laos Comptes Rendus des Séances du Conseil des Recherches Scientifiques de l'Indochine 1942(1):49-57 * J.-H. Hoffett. 1936. Découverte du Crétacé en Indochine iscovery of the Cretaceous in Indochina Comptes Rendus Hebdomadaires des Seances de l'Académie des Sciences 202:1867-1869 {{DEFAULTSORT:Gres Superieurs Formation Geology of Laos Lower Cretaceous Series of Asia Albian Stage Aptian Stage Sandstone formations Fluvial deposits Ichnofossiliferous formations Fossiliferous stratigraphic units of Asia Paleontology in Laos

Fossil content

Fish

Dinosaurs

See also

References

Bibliography

Further reading