Sinuiju Formation
Early Cretaceous formation in North Korea / From Wikipedia, the free encyclopedia
The Sinuiju Formation(신의주층) is a geologic formation in North Korea. Formerly of uncertain age, it is now thought to be Early Cretaceous. A variety of fossils are known from the formation, including those of pterosaurs and birds, including the anurognathid Jeholopterus and a very large enantiornithine specimen with a 5 cm (2.0 in) long tibia and a 3.5 cm (1.4 in) long pygostyle. Frogs have also been found in the formation.[1][2] Numerous compression fossils of insects have also been found.[3]
Quick Facts Type, Sub-units ...
Sinuiju Formation | |
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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 | 40.1°N 124.4°E / 40.1; 124.4 |
Approximate paleocoordinates | 43.8°N 125.8°E / 43.8; 125.8 |
Country | North Korea |
Type section | |
Named for | Sinuiju city |
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