Ryugase Group

Ryugase Group
Stratigraphic range: Late Santonian- Early Campanian ~85–72  Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Overlies	Yezo Group
Lithology
Primary	Mudstone
Location
Coordinates	47°12′N142°30′E / 47.2°N 142.5°E / 47.2; 142.5
Approximate paleocoordinates	51°54′N130°00′E / 51.9°N 130.0°E / 51.9; 130.0
Region	Sakhalin Oblast
Country	Russia
Extent	Sakhalin Island
Ryugase Group (Russia)

The Ryugase Group is a geological formation on Sakhalin Island in far eastern Russia whose strata date back to the Late Cretaceous. ^[1]

Vertebrate paleofauna

• Nipponosaurus sachalinensis - "Partial skull and associated postcrania, juvenile." ^[2] Probably actually from the Yezo Group.

See also

• List of dinosaur-bearing rock formations
• List of fossiliferous stratigraphic units in Russia

References

1. Kawakami Colliery, Sakhalin at Fossilworks.org
2. "Table 20.1," in Weishampel, et al. (2004). Page 442.

Bibliography

• Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), The Dinosauria, 2nd edition, Berkeley: University of California Press, pp. 1–880, ISBN   0-520-24209-2 , retrieved 2019-02-21