The Qulonggongba Formation is a
Late Triassic
The Late Triassic is the third and final epoch (geology), epoch of the Triassic geologic time scale, Period in the geologic time scale, spanning the time between annum, Ma and Ma (million years ago). It is preceded by the Middle Triassic Epoch ...
(
Norian
The Norian is a division of the Triassic Period. It has the rank of an age (geochronology) or stage (chronostratigraphy). It lasted from ~227 to million years ago. It was preceded by the Carnian and succeeded by the Rhaetian.
Stratigraphic defi ...
) geologic
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
Nyalam County,
Tibet
Tibet (; ''Böd''; ) is a region in East Asia, covering much of the Tibetan Plateau and spanning about . It is the traditional homeland of the Tibetan people. Also resident on the plateau are some other ethnic groups such as Monpa people, ...
, near to the border with
Nepal
Nepal (; ne, नेपाल ), formerly the Federal Democratic Republic of Nepal ( ne,
सङ्घीय लोकतान्त्रिक गणतन्त्र नेपाल ), is a landlocked country in South Asia. It is mai ...
, that is part of the
Langjiexue Group.
[M.-M. Chang and F. Jin. (1996). Mesozoic fish faunas of China. In G. Arriata & G. Viohl (ed.), ''Mesozoic Fishes - Systematics and Paleoecology'' 1:461-478] It would have been a
marine environment
Marine habitats are habitats that support marine life. Marine life depends in some way on the saltwater that is in the sea (the term ''marine'' comes from the Latin ''mare'', meaning sea or ocean). A habitat is an ecological or environmental ...
and the Qulonggongba Formation was first identified by Z-M Dong in 1972.
Paleofauna
*''
Veteranella'' (''
Ledoides'') ''langnongensis''
[Z. J. Fang, J. H. Chen, C. Z. Chen, J. G. Sha, X. Lan and S. Z. Wen. (2009). Supraspecific taxa of the Bivalvia first named, described, and published in China (1927-2007). '' The University of Kansas Paleontological Contributions'', New Series]
*''
Himalayasaurus tibetensis
''Himalayasaurus'' is an extinct genus of ichthyosaur from the Late Triassic Qulonggongba Formation of Tibet. The type species ''Himalayasaurus tibetensis'' was described in 1972 on the basis of fragmentary remains, including teeth, limb bones, ...
''
[Z.-M. Dong. (1972). An ichthyosaur fossil from the Qomolangma Feng (Mt. Everest) region. ''Gu ji zhui dong wu yu gu ren lei yan jiu suo ji kan'' 9:7-10]
*
Hybodontidae indet.
References
Geologic formations of Asia
Norian Stage
Late Triassic Asia
Nyalam County
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