Alagteeg Formation

Alagteeg Formation
Alagteeg Formation
Stratigraphic range: Santonian-Campanian; ~85–72 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Underlies	Djadochta Formation
Thickness	~16 m (52 ft) at the Bayan Zag locality
Lithology
Primary	Sandstone, mudstone
Location
Coordinates	44°18′N 103°18′E / 44.3°N 103.3°E
Approximate paleocoordinates	41°54′N 92°24′E / 41.9°N 92.4°E
Region	Ömnögovi Province
Country	Mongolia
Extent	Ulaan Nuur Basin
Type section
Named for	Alag Teeg
Named by	Hasegawa et al.
Year defined	2009
Thickness at type section	~15 m (49 ft)
	Alagteeg Formation (Mongolia)
	Show more

The Alagteeg Formation is a geological formation in Mongolia whose strata date back to the Late Cretaceous. Dinosaur remains are among the fossils that have been recovered from the formation.^[1] 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.^[2]

Fossil content

Color key

Taxon	Reclassified taxon	Taxon falsely reported as present	Dubious taxon or junior synonym	Ichnotaxon	Ootaxon	Morphotaxon

Notes
Uncertain or tentative taxa are in small text; ~~crossed out~~ taxa are discredited.

Dinosaurs

Sauropoda

Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Abdarainurus^[3]	A. barsboldi				A titanosaurian sauropod

Ornithischians

Genus	Species	Notes
Pinacosaurus^[1]	P. grangeri	A ankylosaurid thyreophoran
Plesiohadros	P. djadokhtaensis	A hadrosauroid ornithopod
Protoceratops^[1]	P. andrewsi	A protoceratopsid ceratopsian

Turtles

Turtles of the Alagteeg Formation
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Trionychidae Indet.	Indeterminate

References

^ ^a ^b ^c Weishampel et al., 2004, pp.593-600
^ Hasegawa et al., 2009
^ Alexander O. Averianov; Alexey V. Lopatin (2020). "An unusual new sauropod dinosaur from the Late Cretaceous of Mongolia". Journal of Systematic Palaeontology. 18 (12): 1009–1032. Bibcode:2020JSPal..18.1009A. doi:10.1080/14772019.2020.1716402. S2CID 214244529.

Bibliography

Averianov, Alexander O.; Lopatin, Alexey V. (2020), "An unusual new sauropod dinosaur from the Late Cretaceous of Mongolia", Journal of Systematic Palaeontology, 18 (12): 1009–1032, Bibcode:2020JSPal..18.1009A, doi:10.1080/14772019.2020.1716402
Hasegawa, Hitoshi; Tada, Ryuji; Ichinnorov, Niiden; Minjin, Chuluun (2009), "Lithostratigraphy and depositional environments of the Upper Cretaceous Djadokhta Formation, Ulan Nuur basin, southern Mongolia, and its paleoclimatic implication", Journal of Asian Earth Sciences, 35 (1): 13–26, Bibcode:2009JAESc..35...13H, doi:10.1016/j.jseaes.2008.11.010
Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), The Dinosauria, 2nd edition, Berkeley: University of California Press, pp. 1–880, ISBN 0-520-24209-2, retrieved 2019-02-21{{citation}}: CS1 maint: publisher location (link)

[cretaceousdistribution-1] Weishampel et al., 2004, pp.593-600

[Hasegawa2009-2] Hasegawa et al., 2009

[3] Alexander O. Averianov; Alexey V. Lopatin (2020). "An unusual new sauropod dinosaur from the Late Cretaceous of Mongolia". Journal of Systematic Palaeontology. 18 (12): 1009–1032. Bibcode:2020JSPal..18.1009A. doi:10.1080/14772019.2020.1716402. S2CID 214244529.

[1]

[2]

[3]

Alagteeg Formation

Hub talks

Alagteeg Formation

Alagteeg Formation

Hub rules

Alagteeg Formation

Hub overview

Add your contribution

Inside this hub

Media Collections

Timelines

Articles

Notes collections

Notes

Days in Chronicle

Root Wikipedia Article

Alagteeg Formation

Key Information

Fossil content

Dinosaurs

Sauropoda

Ornithischians

Turtles

See also

References

Bibliography

Add your contribution

Related Hubs