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The Alagteeg Formation 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 ...
in Mongolia whose strata date back to the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.Weishampel et al., 2004, pp.593-600 It predominantly consists of alternating reddish brown mudstone and horizontally laminated sandstone, with ripple cross laminations and rhizoliths. It was first formally defined as a unit by Hasegawa et al in 2008 as a distinct unit from the overlying Djadochta Formation. The environment of deposition is suggested to be fluvial, originating in sandy braided river, floodplain and ephemeral lake depositional environments, as opposed to the desert depositional environment of the Djadochta Formation.Hasegawa et al., 2009
Vertebrate Paleofauna
* ''Abdarainurus
''Abdarainurus'' (meaning "Abdrant Nuru tail" after the holotype locality) is a genus of titanosaur dinosaur from the Alagteeg Formation in Mongolia. The type and only species is ''A. barsboldi''. Currently seen as an indeterminate titanosaur, ...
''Averianov & Lopatin, 2020
* '' Pinacosaurus''
* '' Plesiohadros''
* '' Protoceratops''
* Trionychidae indet.
See also
* List of dinosaur-bearing rock formationsReferences
Bibliography
* * * {{ISBN, 0-520-24209-2 Geologic formations of Mongolia Upper Cretaceous Series of Asia Cretaceous Mongolia Campanian Stage Santonian Stage Sandstone formations Fluvial deposits Paleontology in Mongolia Formations