Sinuiju Formation
| Sinuiju Formation | |
|---|---|
| Stratigraphic range: Barremian-Aptian ~ | |
| Type | Geological formation |
| Sub-units | 8 members |
| Overlies | Precambrian basement |
| Thickness | >500 metres (1,600 ft) |
| Lithology | |
| Primary | Sandstone, siltstone, mudstone |
| Other | Andesite |
| Location | |
| Coordinates | 40°06′N 124°24′E / 40.1°N 124.4°E |
| Approximate paleocoordinates | 43°48′N 125°48′E / 43.8°N 125.8°E |
| Country |  North Korea |
| Type section | |
| Named for | Sinuiju city |
  Sinuiju Formation (North Korea) | |
The Sinuiju Formation(신의주 지질누층) is a geologic formation in North Korea. Formerly of uncertain age, it is now thought to be Early Cretaceous. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.[1] Compression fossils of insects are also known from the formation.[2] Several bird fossils are found in this formation, including a very large enantiornithine specimen with a 5 cm (2.0 in) long tibia and a 3.5 cm (1.4 in) long pygostyle. Amphibian fossils, including frogs and lissamphibians, have also been found here.[3][4]
Fossil content
Fish
Amphibians
- Anuran (a frog, might be referred to Liaobatrachus grabaui).[5]
Pterosaurs
- Anurognathidae indet.[3][4]
Birds
- Confuciusornithidae indet. (known colloquially as the Archaeopteryx of Korea)[3][4]
- Enantiornithes indet.[3][4]
- Ornithurae indet.[4]
Insects[6]
- Angarosphex baektoensus
- Sinuijuhelorus baektoensis
- Sinuijus baektoensis
- Stellularis sinuijuensis
- Stenophlebia ryonsangensis[7]
- Sinuijumantispa ryonsangiensis[8]
Other invertebrates
- Eosestheria (a conchostracan)[4]
See also
References
- ^ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
- ^ Jon, SuHyang; Won, CholGuk; So, KwangSik; Nam, TuYong (July 2019). "New Mesozoic insect fossils from the Democratic People's Republic of Korea". Cretaceous Research. 99: 240–245. Bibcode:2019CrRes..99..240J. doi:10.1016/j.cretres.2019.02.019. S2CID 134337948.
- ^ a b c d e f Gao, K.; Li, Q.; Wei, M.; Pak, H.; Pak, I. (2009). "Early Cretaceous birds and pterosaurs from the Sinuiju Series, and geographic extension of the Jehol Biota into the Korean Peninsula" (PDF). Journal of the Paleontological Society of Korea. 25 (1): 57–61. ISSN 1225-0929.
- ^ a b c d e f g h Choi, S.; Lee, Y.N. (2017). "A review of vertebrate body fossils from the Korean Peninsula and perspectives". Geosciences Journal. 21 (6): 867–889. Bibcode:2017GescJ..21..867C. doi:10.1007/s12303-017-0040-6. S2CID 133835817.
- ^ So, Kwang-Sik; Jong, Tal-Mi; Won, Chol Guk; Jo, Song-Dae (2022-08-05). "A fossil anuran from the Lower Cretaceous Sinuiju Formation, North Phyongan Province, Democratic People's Republic of Korea". Cretaceous Research. 140: 105304. Bibcode:2022CrRes.14005304S. doi:10.1016/j.cretres.2022.105304. ISSN 0195-6671. S2CID 251425462.
- ^ Paektodong, Sinuiju City at Fossilworks.org
- ^ Won et al., 2021
- ^ So, Kwang- Sik; Won, Chol-Guk (2022-02-16). "A new fossil mantis fly (Insecta: Neuroptera: Mantispidae) from the Lower Cretaceous of the Democratic People's Republic of Korea". Cretaceous Research. 135: 105175. Bibcode:2022CrRes.13505175S. doi:10.1016/j.cretres.2022.105175. ISSN 0195-6671. S2CID 246936524.