Oi Formation Explained

The Oi Formation is a palaeontological formation located in the Ichishi region of Central Japan. It is part of the Miocene Ichishi Group, which dates to the Lower Miocene period.^[1] The Kamimitsugano tuffaceous sandstone members of the Oi Formation were found to contain two of the oldest fossils of still existent species (the Ophiomusium lymani and Ophiochiton cf. fastigatus).^{[2] [3]}

See also

• List of fossil sites

Further reading

• (1993); Wildlife of Gondwana. Reed.

Notes and References

1. MATSUOKA. HIROSHIGE. SAKAKURA. FUJIO. OHE. FUJIO. A Miocene Pseudodontorn. Paleontological Research. December 30, 1998. 2. 4. 246. 23 December 2014.
2. Book: Feral. Jean-Pierre. Bruno. David. Echinoderm Research 2001. 2001. CRC Press. 56. 9789058095282.
3. Web site: Ophiomusium lymani. Encyclopedia of Life. National Museum of Natural History (USA). 23 December 2014.