Plateosaurus Mass Grave Found in Switzerland

This is quite a find.

"It could be that the area extends for 1.5 kilometers (0.9 miles) and
in that case, you could certainly say it's the biggest site in Europe," said
Martin Sander, a dinosaur paleontologist at the university of Bonn in
Germany.

The Frick area contained the bones of one animal per 100 square
meters, Sander said, so the entire area might contain bones of 100 more
Plateosaurus.

These Plateosaurus' seem to be similar to elephants. This article says how older elephants die close to water and their skeletons pile up. I wonder if these Dinosaurs had the same behavior?

This is a Plateosaurus (I thought they were those Bonehead Plated dinosaurs when I first red the article.)