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Ukureyskaya Formation
Geological formation in Russia From Wikipedia, the free encyclopedia
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The Ukureyskaya Formation, also referred to as the Ukurey Formation, is a geological formation in Zabaykalsky Krai, part of the Russian Far East. It is made up of Middle Jurassic and Late Jurassic layers.[1] It covers large areas around Kulinda.[2]
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History
The Ukureyskaya Formation was mentioned by Sinitsa & Starukhina (1986),[3] and was first discovered by Sofia M. Sinitsa and her team from the Russian Academy of Sciences before being excavated in 2010 by a group of Russian and Belgian palaeontologists;[4] during this time, the holotype of Kulindadromeus zabaikalicus was discovered.[5] Excavations wrapped up in 2013 or 2014.[6]
Description
The volcanic ash layers of the Ukureyskaya Formation form a Konservat-Lagerstätte with an exceptional preservation,[1] and it likely represents a nearshore lacustrine or estuarine-deltaic environment similar to the Yixian Formation.[2]
In total, two bone beds were identified during the excavations that took place between 2010 and 2013/14;[6] Bonebed 4 is older than Bonebed 3.
Age
Sinitsa & Starukhina (1986) and Sinitsa (2011) suggested that the Ukureyskaya Formation dated to the Late Jurassic-Early Cretaceous.[3][4]
Godefroit et al. (2014) and Alivanov & Saveliev (2014) have suggested that as a whole, the Ukureyskaya Formation dates to the Bajocian-Tithonian,[5][7] while more recent dating work by Cincotta et al. (2019) suggests that the layers containing the remains of Kulindadromeus are Bathonian in age.[8]
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Paleofauna
References
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