Fossilized fish could indicate rich deposits of
valuable rare-earth metals by University of Tokyo
PhysOrg, June 18. 2020
https://phys.org/news/2020-06-fossilized-fish-rich-deposits-valuable.html
Fish fossils become buried treasure. Fossilized
fish could indicate rich deposits of valuable
rare-earth metals by University of Tokyo, June 18. 2020
https://www.eurekalert.org/pub_releases/2020-06/uot-ffb061720.php
The paper is:
Junichiro Ohta, Kazutaka Yasukawa, Tatsuo
Nozaki, Yutaro Takaya, Kazuhide Mimura,
Koichiro Fuj