The Yangliujing Formation is a Middle Triassic geologic unit found in the Guizhou and Yunnan Provinces of southern China.
Description Most of the formation is represented by massive dolomites, indicative of a shallow-water depositional environment. Fossils are generally rare, but conodonts from the Anisian-Ladinian boundary (namely several species of Neogondolella) are known from the lower part of the formation. Some marine reptiles have been found in dolomitic limestone near Dingxiao, an area of Guizhou sometimes considered to preserve the upper part of the Yangliujing Formation. However, under a more restrictive definition of the Yangliujing Formation, the fossils of Dingxiao would instead belong to the overlying Zhuganpo Formation.Benton et al., 2013Sun et al., 2016
Fossil content The following fossils have been reported from the formation: Fish Omanoselache contrarius ?Parvodus sp. ?Semionotiformes indet. Brachiopods Mentzelia sp. Nudispiriferina sp. Bivalves Asoella illyrica Unionites sp. Crinoids Traumatocrinus hsui Conodonts Ozarkodina kockeli
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