The one of the most complete examples of a baby dinosaur ever found may have been killed by a massive volcanic blast. Once swam through the Southern Ocean approximately 70 million years ago, the undamaged, well preserved skeleton was recovered from Antarctica frozen ground.
This baby Plesiosaur was an ancient marine reptile having paddle-like fins. It is believed to be a baby plesiosaur, as the bones of this 5-foot-long skeleton are found to have not developed distinct ends!
At the site where the fossil was discovered, volcanic ash, layered in with marine sands was found. According to the researchers, a massive eruption on the scale of Mt. St. Helens in 1980 may have dumped ash into the ocean. And, this must have led to the death of the baby plesiosaur reserving it.
The skeleton stayed preserved by silica released from the ash.