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

See also

References

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

Bibliography