Flock lived about 50 million years ago.
Scientists from the University of Arizona said in one of the Japanese museums limestone slate slab, which retained the imprint of a flock of fish. As reported by the online edition of the Chronicle.info with reference to zn.ua the imprint recorded more than hundreds of fish from the pack that lived about 50 million years ago.
It is noted that the plate was found during excavations on the formation of the green river in North America. It is located on the territory of the modern States of Utah, Wyoming and Colorado and has preserved evidence of the Eocene, which lasted between 56 and 34 million years ago.
Scientists say that the movement of fish clearly agreed, pointing out that even then they have long and confidently interacted with each other in flocks. This behavior is really considered very old, but direct evidence for this is extremely small.
In China, we found millennial tombs
Just the researchers were able to count 259 fish that belonged to the extinct mind Erismatopterus levatus. It is impossible to say with certainty what killed the fish, possibly collapse the dunes or beach.