{{short description|Geologic formation in Japan}} {{Infobox rock |name= Yamaga Formation |alternative_name= |type= |type_link= |image= |image_size= |alt= |caption= |coordinates={{Coord|33.9970|130.8153|region:JP|format=dms|display=inline,title}} |composition=Palaeontological Formation |composition_secondary= }} The '''Yamaga Formation''' is a palaeontological formation located in Japan. It dates to the Upper Oligocene period.<ref>{{Cite web|title=Habitat reconstruction of oligocene elasmobranchs from Yamaga Formation, Ashiya Group, western Japan|url=https://www.researchgate.net/publication/232685956|access-date=26 February 2021|website=ResearchGate}}</ref>
== See also == * List of fossil sites {{reflist}}
== Further reading == * {{aut|Vickers-Rich, Patricia & Rich, Thomas Hewett}} (1993); ''Wildlife of Gondwana''. Reed. {{ISBN|0-7301-0315-3}}
Category:Geologic formations of Japan Category:Paleogene System of Asia Category:Paleogene Japan Category:Oligocene Series Category:Oligocene paleontological sites Category:Paleontology in Japan
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